Hf Receiving Loop Antenna

The E field antenna has more statics, and the loop is less sensitive under 1. Active receiving loop antennas are a terrific solution for local noise and thunderstorm static rejection on the low bands. NEWSFLASH ! ML&S are pleased to announce a new radio from Yaesu ! The all new compact Yaesu FTDX10 – HF/6M/4M 100W – Hybrid SDR Configuration Like the FTDX101 series, the new FTDX10 utilizes the Yaesu Hybrid SDR configuration – More info to follow soon…. Making efficient loops at HF is easier as the capacitance’s are larger and stray capacitance is therefore not such an issue. This is done by winding a coil or loop, generally with tightly-spaced turns over one end of a ferrite rod or bar. An Indoor VHF Delta Loop. Mobile Antennas Mobile Antennas. If you live in the shadow of one or more powerful AM broadcast transmitters, contact me for information on a solution for you. The antenna loops are relatively small but achieve good receiving levels in conjunction with the low-noise amplifiers. Dave's Homemade Loop Antennas, Page 3. You are now part of the magnetic loop HF antenna craze that is sweeping the amateur radio community. DX Engineering conceived innovative phasing methods and systems for HF directive receive arrays. I have only tried it on the 80m band. USA, Canada delivery — W6LVP magnetic loop. It is based on the Möbius loop design which results in a high degree of noise cancelling. com Magnetic Loop Antenna for 80-20 mtrs by Frank N4SPP. Antenna Gain:40. In addition, there is a lot of content around this antenna. Loop Antenna Loop Antenna. 80 Ex Tax: £269. The antenna can be for all LF, MW and HF professional monitoring and short wave listening. An Indoor VHF Delta Loop. For receiving-only small loop antennas I refer to chapter 7. I will try to explain in few words how the small magnetic loop antenna works. I cut off one end of the connector and formed a loop 1/5 the diameter of the main loop. The best of two worlds come together. 3: 13' 1" 6 Meter : Model # Band Stacked Element Phasing. HF Receive Antennas. Chameleon Antenna Portable Magnetic HF (10 - 80M) Loop Antenna, 10W CW, 25W SSB. Antenna Rotator with Arduino. The Cross Country Wireless HF Active Loop Antenna is a compact receiving loop with a frequency range of 200 kHz to 70 MHz with extended coverage up to 148 MHz. With this RF SWR Bridge board, you can measure in thru-mode filters, amplifiers and in reflective mode antennas, impedances, inductance, capacitance and impedance matching etc. High Gain Hf Antenna. Please note that the 1700-6000 element has fairly low gain and the HF-1 element has very low gain. For the last year I have been running a Wellbrook ALA100LN preamplifier driven from a 8m x 2m wire loop for LF to 6m. I was able to receive BBC Radio Wales from here in Norfolk on 882kHz at about S6-7 on my Icom 756 Pro 3. No other US loop can make this claim. There are tales on the internet and amongst Hams that this antenna is a “cloudwarmer”, in other words, the radio energy goes straight up and “warms the clouds”. Small loop antenna used for receiving, consisting of about 10 turns around a 12 cm × 10 cm Small loop receiving antennas are also almost always resonated using a parallel plate capacitor The use of coupling coils for inductive (magnetic) transmission systems including LF and HF (rather than UHF. It's just the reverse for loop antennas - they have high H field strengths and low E field strengths. My friend Antoine-K3DY worked some ZL’s and VK’s at sunrise on 80M CW using this antenna for receive. For non-resonant end fed antennas, the typical feed point impedance is 300 to 600 ohms and a 9:1 impedance transformer (e. In the past wide band HF loop antennas have not been cheap, normally costing $300+ dollars from manufacturers like Wellbrook. Your email address will not be published. Single turn small loop as transmitting antenna. Field trials of the CHA F-LOOP 2. Phase-locked loop feedback control circuit. Newegg shopping upgraded ™. The loop was wired as an unshielded type loop. 80 Meter Loop Antenna. 4 GHz loop antenna will only need to be about 12 centimeters in perimeter. The official website for The Deputy Commandant for Mission Support. The video starts out with the transceiver using the receive loop. TECSUN AN-48x is an active loop antenna for enhancing shortwave (SW), medium wave (MW/AM) and longwave (LW) reception. I feed both loops from a single coax run tied to both loops. Direct waves travel directly from the transmitting antenna to the receiving antenna when they are within the radio line-of-sight. For an These patterns are what antenna engineers call reciprocal—in that the transmit-power (the capability of the AP to 'speak') will be highest at the peaks, and so will the. Building on these design breakthroughs, Hi-Z Antennas has been producing excellent receiving systems for over five years. Combining circuit for loop antennas consists of three phase inverters. Principally an impedance matching is not necessary. For this reason, this is an antenna highly recommended to those who are new to ham radio. Receiving Antenna Arrays [11] In this section, observations and results are pre-sented from HF‐MIMO measurements in which both the “X‐Y‐Z” array and the ground symmetric loop (GSL) array were simultaneously employed. One or the. As the antenna is wound with litz wire inside the pipe, it is difficult to model it in electromagnetism (EM) simulation software such as FEKO or HFSS. Same item and improved quality as the old Pixel Specifications: HF Receive Antenna Type: Shielded Magnetic Loop. The loop has a broad frequency range of 20kHz to 70MHz, plus extended coverage, which takes operation up to 148MHz. I discovered these popular antennas from other Hams at the Contesting Club (Potomac Valley Radio Club) I belong to. Eight instantaneous switching directions. Hf loop antenna. Mounts with Coax. Diamond® Antennas are sold through authorized dealers. It can also be used for VHF FM reception and will give useful VHF airband reception when mounted outdoors. The noise has reduced a lot and listening to the low bands is not annoying anymore. Register now to gain access to all of our features. Folklore claims a small "shielded" loop antenna behaves like an electrical sieve or filter, sorting "good magnetic signals" from "bad electrical noise". The basic formula for determining the length of a full-wave wire Loop antenna is: 1005 ÷ freq (mHz) = Length (feet). wav file, and in Edison it shows that there are loop points set at the end. (Very large currents can circulate in loop antennas, and wires can get quite warm!) So generally for the HF bands, stranded wire, covered or bare, is a good choice. Trying an HF Horizontal Loop Antenna I was looking for a new antenna to try this weekend. Hf loop antenna. This link is listed in our web site directory since Thursday Jul 14 2005, and till today "HF Receiving Loop Antenna" has been followed for a total of 18587 times. Below some pictures of the box and antenna before the active components were added. The component which can restrict a wide operating bandwidth is the choke balun. The receiving station, which was muted up until now, will typically emit an audible alarm and visual alert for the receiving operator of the incoming call. As the diameter of the loop used is rather small the signals are not very loud. Operating mode SSB/CW/AM. Autore Topic: Antenna Loop Magnetica HF (Letto 34170 volte). Loop antennas have been popular with 80-meter DXers for more than 30 years. This is a design by KK5JY. This is a small loop, that is the length is ≤0. Technically, the 3805er is a single-turn shielded loop antenna. 5 watt 20-meterband AM/CW transmitter RF Powermeter / dummy load Viportmutant: Portable (balcony) multi band HF-antenna. It has gain, they receive well, low noise, takes up little space and cost $$ cheap $$. USA, Canada delivery — W6LVP magnetic loop. Antennas: Shortwave [HF] _. For ELF and Natural Radio our L-600S H-field loop works well with a sound card or earphones. ~ € 10: 4 (or more) ceramic egg insulators: Attach the antenna to string or rope. It can be tuned at or below 1. HF loop antenna. The AX-81S Active HF Antenna is an excellent match for WiNRADiO WR-G303i, WR-G303e, WR-G313i and WR-G313e, shortwave receivers, and WR-G33EM marine receiver. I will try to explain in few words how the small magnetic loop antenna works. The loop is Based on Don Moman's famous loop his drawing is at the bottom of the page. High Gain Conical Horn Antennas. Experiment with full-wave loops. 80m Loop Antenna. This is a 200 Watt PEP step up transformer for end fed full and half wave antennas without radials, designed as a 200 Watt PEP upgrade by PA0EJH for the originaly Par Electronics designed 25 Watt HF endfedz multiband end fed antenna. Linear polarization. 86 - Fan-Dipole Antenna for 80m to 6m. Diagram of the loop antenna. They are very useful in radio communication or even the TV signal reception. Electrical circuit of this active antenna amplifier board is based on high impedance differential amplifier wired across the loop. Maximum power 250 mW. 93 - Picnic Vertical Wire Antenna. The ALA 1530 active magnetic loop antenna (I). the circumference of the loop). Novel Internal High Gain Loop Handset Phone Antenna Design 30. HF (Multi HF) (3). 1MHz-180MHz 20dB SDR FM radio antenna LOOP small loop HF antenna. Leave a Reply Cancel reply. FT-891 HF+50Mhz ALL MODE MOBILE TRANSCEIVER. Rob Wagner. This following antennas were inspired by Harry Lythall (SM0VPO) 'flat-dwellers' frame antenna which he uses for Rx (and low power TX) on 80m and 160m. In this chapter the small loop antenna will be discussed as a transmitting antenna. The smaller loop is about 60 cm in length diameter 1/5 of the main loop, material is 1,5 square mm copperwire. Follow these steps to successfully configure the console to receive with any SDR and for transmit either a SDR (Pluto, LimeSDR) or an external radio with an up-converter. Wellbrook Communications are the only UK company that supplies a complete range of Long wave loops, Medium wave (AM) loops and Shortwave (HF) receiving loop antennas for radio amateurs and listener hobbyists. This was a perfect copy and far better than I can get it on any of my other antennas, including a W5GI 100ft dipole and a Western HF10 dipole outside and an array of dipoles in the loft. 4 GHz uplink of NB and WB TPX is RHCP, 10 GHz downlink of NB TPX is vertical, WB TPX is horizontal. Even then it would be very subjective. Antenna impedance/connector: 50 ohms / 2*SO-239 + 1*RCA/Phono for RX only (HF: 16. This report describes development of a tri-axial mutually orthogonal broadband twin-loop receiving antenna for the HF band. We have a dedicated team here to help. Using the receiving loop described it is again possible to enjoy general SW listening and operation on the lower HF amateur bands thanks to the significant reduction in the level of QRM. The loop has a broad frequency range of 20kHz to 70MHz, plus extended coverage, which takes operation up to 148MHz. Receive antennas are the The "LoG" or "Loop on Ground" is a simple antenna to get you going. Obviously, they have advantages over a wire -- unless the wire is very long. Loop Antenna Fields. The loop was wired as an unshielded type loop. theperimeter. The Stealth ST-940B Mobile HF NVIS Magnetic Loop Antenna has been developed to address the emerging need to reduce the visibility of vehicles fitted with traditional HF antenna systems. Building on these design breakthroughs, Hi-Z Antennas has been producing excellent receiving systems for over five years. There are equipment reviews of the Elad. 4 GHz loop antenna will only need to be about 12 centimeters in perimeter. However, it also requires retuning quite often in order to stay on-band. Antenna Gain:40. This combination of factors pulled down the average and median signal reports and masked how well the loop performs on 40 meters. It is the pad in the lower left of the module, right next to the small coil. the layout of my yard allows me to place a few receive antennas about 100 feet away from the house and the most obnoxious noise generators. A magnetic loop antenna is a winding of copper wire around a frame (for air-core loops) or around ferromagnetic material (for ferrite loops). A balun is a device that is used at the feed point of a balanced antenna when an unbalanced feed line is desired to feed the antenna. HF Portable & Flexible Receive Loop Antenna Covers HF frequencies (10 kHz to 30 MHz) Usable on VHF up to 300 MHz as a folded Dipole. Antennas 101. For just receiving, the only 'tuned' antennas I've used were air core loops for MW DX. Remarkable for an antenna that is only less than three foot in diameter and covers 3. Antenna and static discharge wicks should be inspected carefully on the walkaround for integrity and burns, especially if lightning or St Elmo's fire has been observed. I have been experimenting with some Receive-antennas for the Low HF bands (80 and 160 meters is "low-band" to me). Antenna Commercial Antenna Discone Antenna HF Antenna HT Antenna Loop Antenna Marine Antenna Mobile Antenna Noise Canceling Antenna Pre-Amplifier Antenna Receiving Only Antenna Satellite Antenna Scanner Antenna SWL Antenna Tuners Antenna V-U-SHF Antenna Whips. Which of the following is multiband HF receiving antenna? a) Square loop b) Log-periodic c) Conical horn d) Folded dipole. The loop is Based on Don Moman's famous loop his drawing is at the bottom of the page. A loop antenna will be resonant (with a purely real impedance) as the perimeter of the loop approaches one wavelength in size. Recently Chinese manufacturers have begun producing a low cost wide band (100 kHz - 30 MHz) magnetic loop HF antenna known as the MLA-30. 7 MHz (80 – 10 meter ham bands)!. The active receiving element is about 5 by 10 cm large. This amplifier can use two separate small magnetic loops. The Alpha Loop is a 10-40 Meter transmit/receive antenna, which handles 100 Watts PEP SSB, 50 Watts CW, and 25 Watts Digital. magnetic loops are a compromise antenna and performance will be down on a full size wire antenna particurlarly on lower hf bands this article compare this magnetic loop with a full sized wire antenna on 80 meters by vk3ye. Maximum power 250 mW. The antenna calculator above uses this formula as a starting point to calculate wire lengths for the dipole. Cross Country Wireless HF Active RX Loop 200 kHz to 70 MHz. Magnetic field lines form loops such that all field lines that go into an object leave it at some point. It means if UE is experience SNR of 0 dB then it should be able to decode a 15Khz signal when the received power is equal to or better than -125. This antenna can receive. The best range I could get using the onboard PCB track antenna was approx 10 to 15 mtrs. A powered receive loop that covers 500khz to 30mhz, and has the same characteristics as their magnetic loop antenna, but no tuning required. It is based on the Möbius loop design which results in a high degree of noise cancelling. Super Antenna MP1DXTR80 HF SuperWhip Tripod All Band 80m MP1 Antenna with Clamp Mount and Go Bag ham Radio Amateur MLA-30 Loop Antenna Active Receiving Antenna. 95 including shipping. HF in the HF Antenna stands for the high-frequency. ) If you propose to change the element diameter, you will need to change all the element lengths! For small corrections, it's safe to make the correction using either of two methods. Mini Whip vs 80 Meter OCF Dipole On HF For Reception. the loop antenna gives the possibility to null some sources of interference. BUT, if you don't have any noise issues to contend with this high up, the loop designed for attenuating noise at 5. other Amateur bands. The most important is the physical size of the antenna used, then its radiation pattern. Building a G3JKF Magnetic Loop Array (Amateur Antenna How-To Guides) 30. How to construct a loop antenna for receiving HF? Ask Question Asked 6 years, 8 months ago. Amateur Base Station Antennas (2) HF Vertical Antennas (13) CB mobile + Mounting Kit (13) HF Mobile Antennas (7) HF Wire Antennas G5RV (2) HF Wire Long Wire Antennas (4) HF Wire Antennas Delta Loop (4) HF Wire Mono Band Antennas (9) HF AM-PRO Mini Dipole (1) CB Radios (2) CB Radio Packages (27) Magnetic Mounts (8) CB Accessories (5) Cable (53. The tuned loop is spiral-wound and square, has about ¼ λ total wire length. 30 - Half Delta Loop Antenna. For simplicity we will start with a single turn loop. K9FD Receiving Loop. If the loop. Technical rept. If the data is received correctly, the receiving Arduino is informed that there is data available and proceeds to decode and action it. I'm not sure if I believe that particular theory, but in any case, the loop can improve reception. We also sell Quality AM/FM, DAB+, shortwave and longwave radios. Receive signal strength indicator (RSSI) and SNR Bass boost * You will also need a proper antenna connected to breakout board. Mobile Antennas Mobile Antennas. What follows is a very inexpensive indoor receiving loop which covers both 80/75 and 160 meters. It is fixed on to an oak base for tabletop mounting, and this measures 300 x150mm. com offers the best prices on computer products, laptop computers, LED LCD TVs, digital cameras, electronics, unlocked phones, office supplies, and more with fast shipping and top-rated customer service. In this chapter the small loop antenna will be discussed as a transmitting antenna. Расчет Bi-loop антенны. Antenna is a pin for external antenna which is often unmarked. Camera (optional). Using a loop antenna, the direction to (or from) the antenna could be determined by monitoring the strength of the signal received. NEWSFLASH ! ML&S are pleased to announce a new radio from Yaesu ! The all new compact Yaesu FTDX10 – HF/6M/4M 100W – Hybrid SDR Configuration Like the FTDX101 series, the new FTDX10 utilizes the Yaesu Hybrid SDR configuration – More info to follow soon…. DETAILS Description: AN-200 Loop Diameter: 9 inches / 230 mm AN-200 tunable medium wave loop antenna is designed for receiving AM (medium wave) broadcasting. " Here are the plans for this antenna. I have built a broadband magnetic receiving antenna. I have only tried it on the 80m band. Great for travel! Indoor Antenna Operating Tips. 00 Ex Tax: £66. Diagram of the loop antenna. Graphics by G8ODE iss 1. W4OP Small Transmit/Receive Loop. In order to receive clear AM Stereo signals -- on the TX-11b or any other AM radio, however, you have to have a good antenna. Patch Array WA5VJB. HF Receiving loop antenna Posted in HF Antennas, shortwave. The main receiving loop is 35cm diameter and has two windings with a switch to select whether you choose one or both of them. It works from 3 MHz to 30 MHz, with up to 10 watts on SSB and CW with a very sensitive receiver. If the distant station is not audible at all, it may take several tries to "get it right". PA0RDT Mini-whip active receiving antenna. Initially I had considered putting it in the attic - but that space is already past it's limit of antenna complications with the current antennas. Small Receiving Antennas 4 to 9 dB RDF 4 dB: Bidirectional 8 foot diameter "magnetic" loop close to the ground 5 dB: Single vertical antenna (short vertical or ¼ wavelength vertical) 6 dB: 225 foot Beverage on Ground (BOG) 6 dB: 250 to 400 foot Beverage about 7 feet high 7 dB: Unidirectional terminated small loop flag, pennant, EWE, VE3DO. The loop was wired as an unshielded type loop. HF - Loop Magnetica 1 QRP. Small loop antennas are mainly of two types − Circular loop antennas; Square loop antennas; These two types of loop antennas are mostly. Amateur Base Antennas. (HF-1 does not tilt). the circumference of the loop). The most important is the physical size of the antenna used, then its radiation pattern. The loop thus spans VLF, LF, MW, HF, as well as the lower VHF bands. NEWSFLASH ! ML&S are pleased to announce a new radio from Yaesu ! The all new compact Yaesu FTDX10 – HF/6M/4M 100W – Hybrid SDR Configuration Like the FTDX101 series, the new FTDX10 utilizes the Yaesu Hybrid SDR configuration – More info to follow soon…. Resonant loop antennas have a circum­ ference of 1 λ. Capable of automatically tuning across its frequency range in less than a 50th of a second, it is compatible with virtually any HF transceiver including frequency hopping types without the need for a separate control. We have recently been able to obtain a small number of YouLoop HF/VHF portable receive only passive antennas that were produced by the owner of Airspy. The W6LVP loop is better at stealth and ships in a much smaller box. A collection of ham radio antenna projects mainly for HF bands. Thicker wire provides better reception and is more suitable for transmitting (if you have a license) but it is heavier. So, if we receive an electro-magnetic signal on equally sensitive individual loop and wire antennas, phase shift the feeder signal of one by 90 degrees and then add, we double the sensitivity in line with the loop in one direction, and cancel it in the other to produce the cardioid reception pattern. There are equipment reviews of the Elad. 28 dB loss typ. We also sell Quality AM/FM, DAB+, shortwave and longwave radios. The most important is the physical size of the antenna used, then its radiation pattern. The Cross Country Wireless HF Active Loop Antenna is a compact receiving loop with a frequency range of 200 kHz to 70 MHz with extended coverage up to 148 MHz. Loop antennas (magnetic) are known to accomplish this. When a wave is transmitted or received, it may be done in different directions. Portable Magnetic Loop Receive By : N6VOA 13-55 Mhz. For instance, Figures: A, B & C have the horizontal side as their base, while Figures D & E feature the horizontal component at the top of the antenna. HF Receiving loop antenna Posted in HF Antennas, shortwave. 160 Meter Full Wave Loop Antenna We compared 10 top of the line 160 Meter Full Wave Loop Antenna over the latter 2 years. The rotation of the magnetic loop allows moving it’s rather sharp null around to engage noise sources or other QRM, especially plasma TV RFI. We have over 32 years of experience designing and building antennas and systems to satisfy the ever expending communications needs. Receive loop antenna MFJ-1886 HF loop shortwave antenna. High Gain Hf Antenna. The electrically small size of these loop antennas has the advantage of convenience in handling, availability of a zero- response orientation, and a simple expression for the voltage produced by a given field strength. This is an unusual antenna in my collection, the PA0RDT active mini whip. The loop has a broad frequency range of 20kHz to 70MHz, plus extended coverage, which takes operation up to 148MHz. -----, "Improved HF Receiving Loop. The frequency bands of primary importance in antenna theory are listed. Antennas: Shortwave [HF] _. This report describes development of a tri-axial mutually orthogonal broadband twin-loop receiving antenna for the HF band. It is basically a transformer loop antenna: it consists of a multi-turn tuned loop and a small feed loop. The tuned loop is spiral-wound and square, has about ¼ λ total wire length. 91 - Inductance-Loaded Shortened Dipole for 160m. Finally, the directivity of a vertical HF antenna can be effectively employed at the reception end to cancel out high-angle interference caused by near-by stations. 5 MHz to 29. NEWSFLASH ! ML&S are pleased to announce a new radio from Yaesu ! The all new compact Yaesu FTDX10 – HF/6M/4M 100W – Hybrid SDR Configuration Like the FTDX101 series, the new FTDX10 utilizes the Yaesu Hybrid SDR configuration – More info to follow soon…. Steve Yates - AA5TB. The Loop Skywire, with a triangle shape called Delta Loop Antenna, is an easy to build multiband antenna, without the necessity of traps or coils, using just simple wire. The Advanced HF Solutions antenna has the ability to receive the same signal level as a large dipole. Operating mode SSB/CW/AM. HF -- All you can eat from zero to 30 MHz Nils Schiffhauer, DK8OK. Magnetic Loop Antennas What are magnetic antennas? ‘Magnetic' because they pick up the magnetic component of an electromagnetic field, unlike the usual antenna forms (dipoles, yagi antennas, vertical antennas), which only respond to the electrical component. 5 watt 20-meterband AM/CW transmitter RF Powermeter / dummy load Viportmutant: Portable (balcony) multi band HF-antenna. We demonstrate that optimization of the small HF antenna's receiving-performance parameters, such as its receiving sensitivity and noise figure, are directly a function of optimizing the antenna's impedance match and radiation efficiency, independently of whether a dipole, monopole, or loop-like design is utilized. K-180WLA Active Loop Broadband Receiving Antenna 0. Thus, the small and light antenna can be used flexibly. Mounts with Coax. The loop comes in a triangular form factor, measuring 1m across and 1m high. QRZ Shareware Collection antennas -- over 40 antenna files. Ignore them and you'll spend big bucks with little improvements in receiving ability. Indoor HF operation. The loop thus spans VLF, LF, MW, HF, as well as the lower VHF bands. 94 - Laid-Back Quad Antenna for 80m. The Cross Country Wireless HF Active Loop Antenna is a compact receiving loop with a frequency range of 200 kHz to 70 MHz with extended coverage up to 148 MHz. wire strung around your house at rain-gutter height, plus. 10 watt HF 15 meterband amplifier using 2SC1969 or 2SC1944 or 2SC1173 10 watt HF 17 meterband amplifier using 2SC1969 or 2SC1944 or 2SC1173 1 watt 10-meterband AM/CW transmitter 0. More Antennas Means Better Performance. A collection of ham radio antenna projects mainly for HF bands. All mounting hardware is provided. These are typically constructed with a loop of conducting material formed so that the two ends of the loop are almost touching. Amateur Base Antennas. The low-resistance magnet loop principle and the direct and centered grounding of the loops (completely symmetrical structure of mechanics and electronics) result in a. Marris, G2BZQ See Feedback, May 1996 QST for corrections to this article. MFJ-1888 - High Performance Receiving Loop - 5 to 30 MHz. It can be tuned at or below 1. Shared Apex Loop Receive Antenna System. 95 including free worldwide shipping. 85 - Backpack J-Pole Antenna for 10m, 6m, 2m. NEWSFLASH ! ML&S are pleased to announce a new radio from Yaesu ! The all new compact Yaesu FTDX10 – HF/6M/4M 100W – Hybrid SDR Configuration Like the FTDX101 series, the new FTDX10 utilizes the Yaesu Hybrid SDR configuration – More info to follow soon…. 2:1 or better from 60/40-6M when the antenna is mounted in the clear. 91 - Inductance-Loaded Shortened Dipole for 160m. Smartuners for Stealth Antennas (SGC) 4. Because I am close to a MW broadcaster 9 pole HPF and 9 pole LPF are used to remove the 0. Normally I would be sceptical about the performance of such a small device for HF use but I read a few favourable reviews on the internet and decided to order one for using with my Tecsun PL-600 ssb radio and I thought it would be handy for trying with sdr-radio using a standard r820t2 usb dongle and spyverter HF. Then I used a switch to handle each IR code and print the corresponding key value. Note that this antenna is actually slightly directional off the ends of the antenna, not towards to open side of the loop. 2018 Mobile magnetic loop HF antenna - P/N 2018-00-01 Ideal for NVIS propagation or applications requiring constant coverage for distances of 0-1000km, the loop antenna provides significantly more gain than conventional whip antenna systems. If you are not receiving High Definition programming, consult the TV's manual or contact the manufacturer to make sure A larger/stronger antenna will not necessarily solve this problem. This sale is for an HF magnetic loop antenna that should be attractive to anyone living in an apartment, residence, or other location where it is not possible to erect an outside dipole antenna. Introduction: An antenna which requires no resonant tuning over such a wide range and with a performance equal to a high-gain beam antenna Careful positioning of the antenna can null-out annoying interfering stations while at the same time receiving just the station of interest. Four Antenna + Cable Pairs. 52) to determine that the loop inductance on 160m is about 110uH. Here, you'll find links for high gain antennas covering hf-vhf-uhf. The coupling loop features a novel hybrid coupling scheme that guarantees a match of 1. 160m preamplifier. 2 meter FM; 2 Meter Full Wave Loop-The Magic Wand Antenna. The performance of the small loop is less than that of other antennas. 60cm SMA jumper cable 6. I surmise that my loop's local environment is having effects over the theoretical radiation plots. You may create your loop with wire, small tubing, or the outer shield of coaxial cable. 975 MHz and 162. PK's Shielded Magnetic Longwave Loop Antennas (150 Khz to 500 Khz). The antennas are a bit difficult to see in the video, but that underscores how stealthy they really are! Locally on ground wave, I also received a superior report with the loop. In addition, there is a lot of content around this antenna. The Underestimated Magnetic Loop Hf Antenna receiving antennas category belongs to antennas main collection and get reviewed and rated by amateur radio operators. 5 mm and we have a "real part" of Z which is the sum of radiation and of loss resistances. It is perfect for operators who do not have space for a larger HF antenna or those who have noise floor issues. So far received 8 votes for a total score of 6. AUTOTEK is the best choice to you! We produce many kinds of antennas, including VHF Antenna,UHF Antenna, VHF/UHF Dual Band Antenna, Tri-BandAntenna, Ham Radio Antenna, CB. In contrast to most loop antennas-this HF radio antenna can accept a higher TX power. Here, you'll find links for high gain antennas covering hf-vhf-uhf. turn loop of about #18 insulated hookup wire by taping the wire in place one inch inside the foil loop. With this RF SWR Bridge board, you can measure in thru-mode filters, amplifiers and in reflective mode antennas, impedances, inductance, capacitance and impedance matching etc. In addition WiMo purchases further variants, such as end-fed antennas from HyEndFed or Chameleon, as well as various types from Diamond. 3: A popular low noise receiving antenna used by Low Band operators is the EWE, Flag and K9AY antennas. The BABY loop at TOKYO Hamufea 2015 the first day, had been parked near the smoking area. Thus, the small and light antenna can be used flexibly. The official website for The Deputy Commandant for Mission Support. This antenna is the direct cost and performance competitor with the MFJ-1886. Loop antenna. It features digital tuning, dual VFOs, RIT, CW Keyer and more. Receiving antenna for 80 and 160 metes band. Today we are proud to present a compact DXer-206. This is where you can shop for amateur radios, accessories, antennas, WiFi/ mobile radio antennas 'Magnetic' because they pick up the magnetic component of an electromagnetic field, unlike the usual antenna forms (dipoles, yagi antennas. Sufficient funds have been received to repair the vhf and uhf antennas at the high school. 90 - Double-Delta Antenna 80m and 40m. PK's Loop Antennas. I am using a multiband dipole antenna fed with open-wire line and a balanced ATU. 80m Loop Antenna. Recently Chinese manufacturers have begun producing a low cost wide band (100 kHz - 30 MHz) magnetic loop HF antenna known as the MLA-30. Mini LF loop This design is for a mini HF loop of side length 42cm and is suitable for receiving on 80m and 160m bands. (Revised and updated 8 Apr 2000) (Second update 13 Feb 2002) W7LR tried a 50ft version of this antenna on 160m. The Classic Rain-Gutter Loop Antenna – Is it any Good? A simple technical look at an HF horizontal loop of. Horizontal Loop Antenna Experiments. Can hear many stations now on 160-40M where I would mostly get an S7-S9 noise floor which covered up weaker signals on my wire vertical. The bandwidth capability of the Chameleon Antenna provides reliable and efficient communications. The most common material for home building small ham radio loop antennas is common copper plumbing pipe. Mounts with Coax. Because I do not have room for low band Beverages, the K6STI loop has proven to be a most valuable low noise receive antenna for me. As an example, using a long wire antenna noise on the 80 Metre band was typically S8, the loop has reduced this to S1 or better. I discovered these popular antennas from other Hams at the Contesting Club (Potomac Valley Radio Club) I belong to. BUT, if you don't have any noise issues to contend with this high up, the loop designed for attenuating noise at 5. The following photos show a Magnetic Loop Antenna that is a complete lash-up in terms of the mechanical construction yet it is giving some surprising results. the circumference of the loop). Because of that belief, this type of antenna is also called a magnetic loop. Tweeks are stronger and cleaner with the loop; anyway, the results are very similar, but the area occupied by the loop is about 500 times smaller. If you live in the shadow of one or more powerful AM broadcast transmitters, contact me for information on a solution for you. antenna-gain (integer [0. Magnetic loop antenna has great performance for receiving weak AM/SSB radio signals in urban area where an regular beverage antenna is usually overloaded by industrial HF noise of modern city. Since a good loop antenna will have a high Q factor, this capacitor must be variable and is adjusted along with the receiver's tuning. For an These patterns are what antenna engineers call reciprocal—in that the transmit-power (the capability of the AP to 'speak') will be highest at the peaks, and so will the. MLA-30 Loop Antenna Active Receiving Antenna 100kHz - 30MHz for Short Wave Radio 7/10 We have selected this product as being #8 in Best Hf Antenna For Balcony of 2020. This makes the antenna perfectly usable for FM Broadcast, Aviation Band and 2m HAM Band; A very welcome option for portable VLF/LF/HF/VHF operation. This antenna is approximately 32" in diameter and was constructed to last for many years. HF-DAABT5:Digital Coax or Toslink SPDIF to Analog RCA L/R Audio Converter Adapter with Bluetooth 5. Receive/Transmit Descriptors: Both settings are used to sets the number of descriptors that are allocated in the host memory for storing either received packets, or packets to be transmitted. DX Engineering offers both upgraded versions, the AlexLoop Walkham Premier Antenna (without AlexTune) and the AlexLoop. The loop comes in a triangular form factor, measuring 1m across and 1m high. (Magnetic Loop Antennas) Steve Yates - AA5TB. No Longer Manufactured, replaced by the ALA1530LNP. He used a "pre-war" Terman handbook (p. W6LVP loops cover 2200 through 10 meters (135 kHz through 30 MHz) with no tuning or adjustment. The main receiving loop is 35cm diameter and has two windings with a switch to select whether you choose one or both of them. 6 Еlement loop antenna. Loop Antenna Loop Antenna. You can use another short piece of wire to twist around both sides of the loop wire, thus "grasping" the insulator and preventing any movement. W4OP Small Transmit/Receive Loop. March 20, 2020. The Finnish Radiation and Nuclear Safety Authority @STUK_FI carried out some careful Field Strength analysis on my circularly polarized 40m band Three Phase Tripole and Linearly Polarized NVIS HF band Magnetic Loop Antenna. Compromise disguise antennas are no strangers to hams, especially on HF. Just for trial purposes, I've taken an aluminium bicycle rim (outer diameter 700 mm) and attached a variable capacitor. The loops rotate 360° in azimuth and tilt ± 90° in elevation. DX Engineering conceived innovative phasing methods and systems for HF directive receive arrays. Multi Band HF/VHF/UHF. No Longer Manufactured, replaced by the ALA1530LNP. (Revised and updated 8 Apr 2000) (Second update 13 Feb 2002) W7LR tried a 50ft version of this antenna on 160m. 32-34 Effective, low-profile 160-meter antennas present a formidable challenge. The antenna has been made in a small junction box (Model # E989NNJ-CAR bought at Home Depot). This following antennas were inspired by Harry Lythall (SM0VPO) 'flat-dwellers' frame antenna which he uses for Rx (and low power TX) on 80m and 160m. Best to have 2 antennas to compare signals! Devote at least a year to test antenna before giving up on an antenna. Most signals are received and recorded using a software. A portable quad antenna for QRP operations for 10, 14 & 21 Mhz Bands. If the inductor has a circumference of much less An efficient Magnetic Loop Antenna has a very high Q. 5 to 1 SWR across all bands by using a Russian vacuum variable capacitor. Receiving only antennas category is a curation of 84 web resources on , Comparison Chart of Rx antennas, Triband Receiving Loop for 160/80/40m, The K7TJR Array 160m antenna. I'd be very happy to receive your QSL. HF radio waves propagate from the transmitting antenna to the receiving antenna using two methods: ground waves and sky waves. If the antenna has a gamma match that goes to the bottom of the antenna, then both antennas should be oriented in the same direction. Loop antenna systems seldom have intermodulation-distortion problems because of their lower sensitivity, lower impedance level, and better selectivity. The small single turn magnetic loop (SSTML) antenna consists of a single winding inductor, about 3 feet (1 meter) in diameter, and a tuning capacitor. Recently Chinese manufacturers have begun producing a low cost wide band (100 kHz - 30 MHz) magnetic loop HF antenna known as the MLA-30. The instructions below are for a four foot loop. DX Engineering offers both upgraded versions, the AlexLoop Walkham Premier Antenna (without AlexTune) and the AlexLoop. l SDR portable HF Transceiver. Расчет Bi-loop антенны. Using Your Rsp For Antenna Comparisons. Principally an impedance matching is not necessary. « il: 01 Ottobre 2011, 10:56:27 ». The antenna loops are relatively small but achieve good receiving levels in conjunction with the low-noise amplifiers. As an example, using a long wire antenna noise on the 80 Metre band was typically S8, the loop has reduced this to S1 or better. Just installed the mag loop receive antenna and connected to my IC-7610. Bias supply 4. Antenna History. Its modular construction facilitates experiments to understand where the Möbius inspired electrical design provides benefit. The primary is the small inner loop that is 1/5 of the size of the main loop. 80m Loop Antenna. 15 Small Loop Receiving Antennas 299 16 Small Transmitting Loop Antennas 319 17 Antenna Modeling Software 327 18 VHF/UHF Transmitting and Receiving Antennas 339 19 Microwave Waveguides and Antennas 369 20 Antenna Noise Temperature 417 21 Antennas for Radio Astronomy 421 22 Adjusting, Installing, and Troubleshooting Antennas and Transmission. Log Periodic Dipole Array. improve SWR of a transmitting loop 9 messages all, I'm starting to venture into the world of magnetic loop transmit antenna's. Covering Ku, Ka and X band sat receiving. -Small Loops • Loop Equations • Measuring Efficiency of a Loop or Vertical Antenna • Evaluation of My Loop -Comparison to Verticals • Conclusions -References. The secondary is the main loop, and is the actual antenna. The antenna is a triangular loop antenna 1. As a temporary measure I'll be be wrapping a long wire around the garden, and using it with a 9:1 balun and Mizuho KX-2 ATU that arrived today. Receive Feedline Common Mode Сhoke, feedthrough DC, SO-239. Autofocus 8 megapixels with LED flash. Antenna impedance/connector: 50 ohms / 2*SO-239 + 1*RCA/Phono for RX only (HF: 16. HF Portable Loop Antenna (CHA F-LOOP) Operator’s Manual the magnetic loop HF antenna craze that is sweeping the amateur radio community. You must buy the LA1 base and also order the loop elements for the bands you are interested in. But which ones are worth the effort?. com/airspy-hf-plus/. , patch antennas with a magnetic mount), but I needed more antennas than I had so I built a couple of The antenna is soldered directly to two terminals of an SMA connector. W4OP Small Transmit/Receive Loop. It is the energy storage or reactive induction field response within λ/10 distance from the antenna that gives small "magnetic loop" and "electric dipole" antennas their names. Select antenna to use for transmitting and for receiving. The loop`s preamplifier is phantom-powered through coax, so no external wiring is needed for remote installations. As an example, using a long wire antenna noise on the 80 Metre band was typically S8, the loop has reduced this to S1 or better. UPC: 00861085000268. Package Contents: 1. Travel loop antenna type 40-10 and 80-10. In addition WiMo purchases further variants, such as end-fed antennas from HyEndFed or Chameleon, as well as various types from Diamond. Mounts with Coax. So, if we receive an electro-magnetic signal on equally sensitive individual loop and wire antennas, phase shift the feeder signal of one by 90 degrees and then add, we double the sensitivity in line with the loop in one direction, and cancel it in the other to produce the cardioid reception pattern. MLA-30 Loop Antenna Active Receiving Antenna 100kHz - 30MHz for Short Wave Radio 7/10 We have selected this product as being #8 in Best Hf Antenna For Balcony of 2020. The loop thus spans VLF, LF, MW, HF, as well as the lower VHF bands. Nearly all the serious Contesters in PVRC, and all of their Superstations, have Receive-only Antenna options for the lower Bands. WiMo - YOUR expert for radios and antennas. Flag/Pennant LOOP HF Antenna KIT 50 Ohm with Preamp. Internal Transmit/Receive keying relay disconnects Antenna/Preamp from your receiver when transmitting. 44 foot diameter insulated flexible metal loop with UHF Plugs (PL-259). You can hold the AlexLoop in one hand and tune with the thumb. HF -- All you can eat from zero to 30 MHz Nils Schiffhauer, DK8OK. As loop antennas get larger, they become better antennas. A Small Loop Antenna for 160 Meters QST June 1993, pp. Receive Antenna Control and Phasing Boxes; K9AY Terminated Loop Array ; The Flag Antenna: Basics. HF Receive Antenna Remote Mounting Position: Elevated. A lot of the concerns in transmitting antennas (low SWR, high efficiency, etc) are of diminished importance for receiving antennas, so it's surprisingly easy to make a perfectly good receive antenna with very little design effort. It can be had for a bargain price of around £35 and works great for the price. Patch Array WA5VJB. HF Receiving loop antenna Posted in HF Antennas, shortwave. The whole antenna is about three feet wide, relatively light and fits on a single pole, which I supported in the ground using a screw-in support obtained from Clas Ohlson. Direction finding with small loops. It is fixed on to an oak base for tabletop mounting, and this measures 300 x150mm. In other words, unlike other magnetic transmitting loop antenna controllers, there is no need to transmit and re-tune for minimum SWR every time the frequency has been changed. Building a G3JKF Magnetic Loop Array (Amateur Antenna How-To Guides) 30. Il diametro del loop puo' variare da 1 metro a 2 metri migliorandone il rendimento, il condensatore varaibile da 500 pf permette di operare anche in 80 metri, mentre se da 350 pf accorda Il rendimento e' buono, l'antenna risulta molto selettiva ed il ROS si mantiene costante 1:1,2 circa su tutte le bande. Gyroscope interrupt signal. Active receiving loop antenna English version. Field trials of the CHA F-LOOP 2. AlexLoop Walkham Premier Small Portable Magnetic Loop Antennas are lightweight, can be quickly assembled and are easily tuned to any frequency between 6. Half Delta Loop Antenna 19 31. HF Loop Antenna DIY - Simple & Easy to Build Advantages: Simple & Cost Effective, Suitable for Indoor Installations, Compact in I recently purchase the MFJ-1886 Receiving Loop Antenna for $249 and $45 for shipping via FedEx. In contrast to most loop antennas-this HF radio antenna can accept a higher TX power. Sorry ,this product is not sell anymore. NEWSFLASH ! ML&S are pleased to announce a new radio from Yaesu ! The all new compact Yaesu FTDX10 – HF/6M/4M 100W – Hybrid SDR Configuration Like the FTDX101 series, the new FTDX10 utilizes the Yaesu Hybrid SDR configuration – More info to follow soon…. The Magnetic Loop Controller tunes the antenna in real time, tracking every movement of the Transceiver VFO. In addition WiMo purchases further variants, such as end-fed antennas from HyEndFed or Chameleon, as well as various types from Diamond. Can hear many stations now on 160-40M where I would mostly get an S7-S9 noise floor which covered up weaker signals on my wire vertical. QRZ Shareware Collection antennas -- over 40 antenna files. Receiving Antenna Arrays [11] In this section, observations and results are pre-sented from HF‐MIMO measurements in which both the “X‐Y‐Z” array and the ground symmetric loop (GSL) array were simultaneously employed. Please keep in mind this chatbox is shared with often hundreds of users; don't use it for chatter; use it ONLY for messages about the operation and use of this WebSDR, and about the signals received with it. It comes with the balun “tee” connector, coax inverter, 2x 1m semi-rigid coax cables for a ~60cm loop, and 1x 2m semi-rigid coax for the feedline. 3m (51″) wide with a built-in low noise high dynamic range RF amplifier. (see photos) Already worked a DX CW station I could not select out with the radio using the vertical. CHECK OUT MY OTHER ITEMS I HAVE FOR SALETHANK YOU FOR LOOKING AND HAPPY BROWSING. Small Receiving Antennas 4 to 9 dB RDF 4 dB: Bidirectional 8 foot diameter “magnetic” loop close to the ground 5 dB: Single vertical antenna (short vertical or ¼ wavelength vertical) 6 dB: 225 foot Beverage on Ground (BOG) 6 dB: 250 to 400 foot Beverage about 7 feet high 7 dB: Unidirectional terminated small loop. You may create your loop with wire, small tubing, or the outer shield of coaxial cable. We also sell Quality AM/FM, DAB+, shortwave and longwave radios. LimeSDR-USB HF - 3. In the plane of the loop the antenna is mostly receptive to vertical polarization. The Loop Skywire, with a triangle shape called Delta Loop Antenna, is an easy to build multiband antenna, without the necessity of traps or coils, using just simple wire. A separate counterpoise or earth is not required. If you are not receiving High Definition programming, consult the TV's manual or contact the manufacturer to make sure A larger/stronger antenna will not necessarily solve this problem. That has been our history and it will also be our future. Amateur Mobile Antennas. Errante's 2x225 Ohm virtual ground balun for the dipole-like center-fed folded monopoles multiband HF antenna system Find out more here. Active receiving loop antenna English version. 68 might make an interesting "middle-sized loop" at 13. Which of the following is multiband HF receiving antenna? a) Square loop b) Log-periodic c) Conical horn d) Folded dipole. Global AT-1000 0. Normally I would be sceptical about the performance of such a small device for HF use but I read a few favourable reviews on the internet and decided to order one for using with my Tecsun PL-600 ssb radio and I thought it would be handy for trying with sdr-radio using a standard r820t2 usb dongle and spyverter HF. Once the antenna was setup, we tested the antenna performance with a commercial HF rig. Antenna Theory - Loop. HF Receiving loop antenna Posted in HF Antennas , shortwave Receiving HF signals at my location is a compromise situation due to the antennas I use and the high noise environment in the city. Click any picture to enlarge. The stand alone 80m loop is approximately four feet in diameter. Transmitting is an entirely different ball game. How Low-noise Receiving Antennas really work This area deals primarily with low noise antennas, and discusses effect of antenna directivity on weak-signal reception. Same item and improved quality as the old Pixel Specifications: HF Receive Antenna Type: Shielded Magnetic Loop. The Megaloop MLA30 Plus antenna is compact and easy to install on a balcony or. The smaller loop is about 60 cm in length diameter 1/5 of the main loop, material is 1,5 square mm copperwire. Receive/Transmit Descriptors: Both settings are used to sets the number of descriptors that are allocated in the host memory for storing either received packets, or packets to be transmitted. effective 180 m receiving loop preamp using 2 j310 fet's. Loop antennas have been popular with 80-meter DXers for more than 30 years. The feed of the left antenna is on the bottom. The Half-Wave Dipole Antenna. UE normally has a noise figure of 7 dB then then Rx sensitivity for one sub-carrier will be -125. Active 6 years, 8 months ago. These are typically constructed with a loop of conducting material formed so that the two ends of the loop are almost touching. Antenna Theory - Loop. The New FTDX10 Compact HF/50MHz 100W SDR. Я был бы очень рад получить Baшy QSL. Introduction: An antenna which requires no resonant tuning over such a wide range and with a performance equal to a high-gain beam antenna Careful positioning of the antenna can null-out annoying interfering stations while at the same time receiving just the station of interest. Collinear Franklin Antenna 20 32. Some sources state that the shielded nature of the loop provides additional noise immunity by shorting the (noisy) electric field to ground while responding to the magnetic field. Am Loop Antenna Diy. 2 feet long), made of solid silver rod, in the middle of the roof of an average vehicle, the efficiency would barely meet 90%. This small amplifier works nicely with your supplied loop of apx 3 to 4 feet in diameter. We have over 32 years of experience designing and building antennas and systems to satisfy the ever expending communications needs. In the past wide band HF loop antennas have not been cheap, normally costing $300+ dollars from manufacturers like Wellbrook. « il: 01 Ottobre 2011, 10:56:27 ». Best results will be achieved using a narrow-band vertically polarized antenna tuned for 161. I will try to explain in few words how the small magnetic loop antenna works. Listed under the Antennas/Magnetic Loop category that is about Magnetic Loop. The following photos show a Magnetic Loop Antenna that is a complete lash-up in terms of the mechanical construction yet it is giving some surprising results. Add Soldering Service. The exact shape of the loop is not particularly important. Principally an impedance matching is not necessary. L3Harris pushes the boundaries of space technology by providing reliable antenna and sensor solutions for critical communications, imagery and global positioning, navigation and timing missions. Thus, the small and light antenna can be used flexibly. PVC insulation reduces the velocity factor of antenna wire. The BABY loop at TOKYO Hamufea 2015 the first day, had been parked near the smoking area. A good place to look at antennas would be DX Engineering - Free Shipping on Orders Over. Best Buy provides online shopping in a number of countries and languages. 15 Small Loop Receiving Antennas 299 16 Small Transmitting Loop Antennas 319 17 Antenna Modeling Software 327 18 VHF/UHF Transmitting and Receiving Antennas 339 19 Microwave Waveguides and Antennas 369 20 Antenna Noise Temperature 417 21 Antennas for Radio Astronomy 421 22 Adjusting, Installing, and Troubleshooting Antennas and Transmission. Ignore them and you'll spend big bucks with little improvements in receiving ability. 3: 13' 1" 6 Meter : Model # Band Stacked Element Phasing. For LTE configurations with dual TX RRUSs, redundancy can be achieved by cross-connecting the antenna feeders between the RRUS and the antenna. 5" SATA 6Gbps 3D NAND S. 68 might make an interesting "middle-sized loop" at 13. A loop antenna is actually sensitive to the magnetic field and not the electric field (it is. Tweaking the Flag Antenna; The Bi-Directional Flag Antenna; Building Flag Antennas; Flag Antenna Arrays; Low Dipole as a Receiving Antenna ; In Search of: Accurate Impedance Measurements. Ferrite core antennas, known as loopsticks, are widely used as antennas for radio receivers, particularly for AM broadcast band radios. How Low-noise Receiving Antennas really work This area deals primarily with low noise antennas, and discusses effect of antenna directivity on weak-signal reception. This is a small loop, that is the length is ≤0. Diversity antenna switch. Capable of automatically tuning across its frequency range in less than a 50th of a second, it is compatible with virtually any HF transceiver including frequency hopping types without the need for a separate control. I have been experimenting with small (generally less then 1/10 wavelength circumference) transmitting loop antennas in the HF bands since the 1980's. ) If you propose to change the element diameter, you will need to change all the element lengths! For small corrections, it's safe to make the correction using either of two methods. turn loop of about #18 insulated hookup wire by taping the wire in place one inch inside the foil loop. The feed of the left antenna is on the bottom. 350MHz upper single side band receiving of amateur radio. The loop has a broad frequency range of 20kHz to 70MHz, plus extended coverage, which takes operation up to 148MHz. CHECK OUT MY OTHER ITEMS I HAVE FOR SALETHANK YOU FOR LOOKING AND HAPPY BROWSING. RF signals are electromagnetic waves that consist of an electric. The most common material for home building small ham radio loop antennas is common copper plumbing pipe. If the distant station is not audible at all, it may take several tries to "get it right". No other US loop can make this claim. 5~30 MHz Loop. Great for travel! Indoor Antenna Operating Tips. 95 (Inc VAT at 20%) Add To Cart View Details Wishlist. Because I do not have room for low band Beverages, the K6STI loop has proven to be a most valuable low noise receive antenna for me. It works from 3 MHz to 30 MHz, with up to 10 watts on SSB and CW with a very sensitive receiver. The directional loop design in combination with the receiver's high pass filtering, greatly reduces unwanted noise and hum.