630 meter antenna tuner. Download 630-2200m N6LF TX antenna.

630 meter antenna tuner The antenna is 30ft X 4 in irrigation tubing with 4 drop wires and 4-20 ft top loading wires with only 8 ground radials 35 to 45 ft long. M-600's may be set to display a different parameter from the one displayed 630 Meter Amateur Radio Antenna - The Lowdown 630. 9:1 on 28. The antenna pictured has supported 100 watts SSB. 630m (472-479kHz) Amateur Experimentation VK/ZL A VK7TW presentation (PDF). Alarm contact: Solid state, opto-isolated, 50 V max. The IF radio (a Yaesu FT-817) is tuned to the frequency for 2200 meter WSPR operation - 136. Repeating the tuning is The ladder line drops about 40 feet to a Balun Designs 4114T current balun, and then is fed by 50' of RG8X to the shack. 450 Ohm balanced feed line that allows selecting one of the Zepp antennas that directly connects to the Balanced Antenna tuner in my ham shack. , extreme low or high impedances) at the tuner end, on all bands. What is the wall construction? For the old 20 meter band rhombic atenna at W1AW, it was fed with 600 ohm ladder line. Antenna Tuning Unit BC-306-A, Dimensions and Weights. 21 Release Notes SmartSDR v2. Still not ideal but slightly more efficient. Figure 2: Block diagram of the 630 and 2200 meter transmit chain. PD Filter: A Word about Antennas With the wavelength of 630 Meters approaching half a mile, a traditional antenna, such as a quarter-wave vertical or half-wave dipole, won’t fit on the average piece of residential real I am a happy user of the Alpha S9v43 — but more for radio research than ham radio, until the opening of 2200 meters and 630 meters — this is the only antenna with which I have logged 2200 m band WSPR signals; on 630 m, some WSPR signals come booming in (more or less). This complete 10-80 meter HF antenna solution requires no antenna tuner and includes: Heavy duty mount and hardware; Matching network with SO239 connector; Stainless steel clamps; until the opening of 2200 meters and 630 meters — this is the only antenna with which I have logged 2200 m band WSPR signals; on 630 m, some WSPR signals come W5JGV antenna tuner for 150 - 500 Khz band Antennas for MF and LF Long Waves, Short Antennas, designing antennas for MF and LF communications Evaluation of various operating modes on 600 meters. nient to use for adjusting an antenna tuner. 00-432. ” (see Figure 1) “I’m really amazed at how good the propagation is on 630 metres. The 735 has a general coverage receiver covering 100 kHz to 30 MHz with 105dB dynamic range. They just 630M antenna tuner, 630 Meter remote tuner, 630 meter antenna. B&W Artwork from the original BC-375-E manual: The General Electric BC-375-E transmitter shown with the BC-306-A LF Antenna Most of the states have been worked more than once, plus the Cayman Islands. "The following antenna was a traditional T antenna stretched between 2 masts. For me, portable operations for 17 meters was doable. o +8' Title: 630 Meter Antenna at N9RUTom Author: Al Burroughs Created Date: Here’s a picture of the transmitter I’m currently running on 630 meters. 22 THEMATCHBOX Impedance Matching The transmitter of the IC-7610 offers max. I decided to remove two turns from the bottom half of the coil, lowering the tuning range from 177-330uH to 165-313uH. , not polarity sensitive. Learn to operate below the AM band. Application description IC-7610 The IC-7610 offers two independent receivers that can also receive different bands and operating modes. K. I have 42 States The meter will quickly tell you if your antenna is too high in frequency (capacitive) or if it is too low (inductive) so that the proper corrective The Lowdown Amateur Radio Antenna offers amateur radio enthusiasts a convenient way to operate on 630 meters in a confined area. : The Source article: We partner with amateur radio enthusiasts as they pioneer the new 630-meter band (472-479 kHz). I am QRT on 2200 and 630 meters! In December 2020 the LF/MT T antenna broke during a snowstorm. Fig. After some time was not so stretched and the antenna wire went close to the base of the coil. Jan 31, 2013 Antenna tuners is a little misleading so I'll just call it an antenna matcher because I think that's what it really is isn't it? Using a long wire on an ICOM R7100 LDG Electronics M-600 Remote Antenna Tuner Meters. I’ll only use the FT-817 in conjunction with it for portable use however. 1 Release Notes. By comparing them, you should be able to construct a tuner to your own particular requirements: Realization of a coupling box by Patrice The torus has 6 wires: 2 side CV, 2 side self and 2 to the outputs of the box, for the RX - TX. 25 MHz video carrier control links and experimental: 426. VK5FQ website 12/02/14 Start build of new website. 630 meter Projects Links → . 00: ATV repeater or simplex with 421. But the basic function is the same. LDG Electronics M-600 Remote Antenna Tuner Meters are optional analog units that provide accurate and precise metering of forward and reflected power, including SWR readings, when connected to AT600ProII Antenna Tuners. 5 watts in on 160 meters produces 50 watts out on 630 meters I am using my 160 meter Marconi T antenna with a second tuner. The 50 W SWR of my antenna alone (no attempt at matching) runs the gamut from 2. 3:1 or vice versa. First Posted 12 February 2011. New antenna description I have installed five support poles (80'-95') arranged in a square with one pole in each corner and one in the center as shown in figure 3. When I decided to operate on the newly opened 630 meter band, the lack of commercial amateur radio equipment for the bands below 160 meters forced me to get creative So here's the approach that I took to get on 630 meters by utilizing a repurposed non directional beacon, a modified HP downconverter, and a reconfigured 80 meter dipole antenna. October 08, 2019 in 630m antennas | Permalink | Comments (0) 630 meter antennas. The antenna I use is a 212 foot long end-fed wire that is comprised of one-half of a "2 half-waves in-phase" antenna that consists of one-half of the 77 foot long 450 ohm feed line and one 135' leg of the antenna. It doesn't necessarily have to be the CU-32 or the CU-25. These stations had obtained FCC The antenna system looks like several thousand ohms at the tuner on 40 meters. New product entries include our affordable “The Lowdown” antenna and a variety of accessories. Page last revised 11 April, In October of 2017, the FCC gave us back a piece of our history by creating a new Amateur Radio band at 630 meters (472-479 kHz). 100 W transmitting power and is equipped with a built-in SWR meter and antenna tuner. Contact Isele uses a 30 meter thin, galvanized-iron vertical wire, strung between a ground rod and a high tree branch for receiving on 630 meters. 630. antenna tuner Antenna tuners come in aluminum or metal cases with high resistance. Antenna is a 40' vertical 300' T, and 8-200' radials. 630 in. About a month ago I fired up the SDR-14 (a wide-bandwidth software-defined "receiver") to "listen" to some longwave signals from some (relatively) high-power stations back east. -. It has no radials and no antenna tuner. The link below will take you to the blog post where there's a complete write-up of the project and For example, a 40 meter 1/4 wave vertical antenna is about 33' tall. PD Filter: Transmitter with LP. The filter mods will also work with the Pro II once you use the appropriate mod for general coverage transmit. Teh final amplifier uses an IRF510 FET producing 12 630 meter modified folded unipole antenna. 8. Some tuners have a “bypass” A slightly long build video on the bucket vario. Signal Corps US Army Antenna Tuning Unit BC-306-A. " Dec 28, 2021. Quick Links. There was a lot to cover! You can get on 630 meters without much effort, hope to hear you on the band. But I Even more than 630 metre antennas, those for 2200 metres would appear almost impossible to accommodate in a typical suburban backyard. News. " no3m. Reactive part of the antenna impedance: TF3HZ live spectrograms (covers a part of the 630 meter band) The Shetland Grabber: 472-479 kHz live Figure 1: Complete (except for antenna and matching network) 630 and 2200 meter transmit station. 5 MHz to 86:1 on 160 meters, as mea - sured at the tuner interface. Adding my V. 780 in. The built in tuner is good for matching an antenna that is close to the frequency you are operating on (SWR 3:1 UPDATE: in 2013 the Marconi Tee antenna was retuned to the new 630-metre amateur radio band as ZL1ZLD ceased operation on 512 kHz (600 metres). BUILD AN HF ANTENNA TUNER MAKE A HOMEBREW HF-VHF ANTENNA TUNER 1. 12. 00-426. 00: ATV simplex with 427. Art The theory is to maintain parallel spacing between the conductors from the antenna to the match box (tuner), and to not approach other metal objects by 2-3x the conductor spacing. ka3jjz Wiki Admin Emeritus. Other Models Also, the BC-306-A LF antenna tuner is needed for operation below 800kc. For some portable operations, that might or might not be feasible. Mounting FT-115-B, Dimensions and Weight. 5m) from the centre wire. . (see the sidebar on the right) “Well remember. Download 630-2200m N6LF TX antenna. The inverse is NOT the case, with the Monitor Sensors transverter's excellent front end having no need for any kind of external filtering. This antenna has been up for a couple of years. Radio Transmitter Bc-375-E, Schematic Diagram; The IC-756 Pro is an HF / 6 Meter transceiver. This 28 turn coil allows operation from 11-30 Mhz. x. The Icom IC-735 is an ultra-compact, easy to use HF radio covering 160 through 10 meters with 100 watts. Background: The conventional transmitting antenna for the low MF range is a vertical conductor, possibly top-loaded, working against a ground wire system. For example, a full-size 630 meter half-wave antenna is over 1000 feet long. Radio Height: 3. 472kHz Transverter Build of a transverter for the 630m amateur This has been one heck of a project. 250-MHz video carrier frequency For 630 meters my antenna requires about 230uH while about 2. * VK2DX simple 630m antenna * VK5FQ suburban 630m antenna * NO3M 630m vertical * N6LF 630m antenna notes * 472 kHz. November 2024: I am once again receiving on 2200 and 630 meters. 630M Station: 630M Amp: QSL cards: Home: Antenna: Misc stuff: Information : Most of our antennas will be very short compared to the 630 meter wave length and the 630 Meter CW Operation with the BC-375 by: Henry Rogers - WA7YBS/WHRM. There are actually 3 antenna connectors on the back of the radio. Absolutely the best way to feed a multi-band antenna thru a tuner! LF Tuner Details - Of course, the upshot is that you can't operate the ART-13 on 630M without some type of antenna tuner. 630M band (472kHz-479kHz) Transverter. Cross-Needle Meter; Antenna, Transceiver inputs; Manual Tuning Controls; With an 8x2x6-inch size, this device is small and compact. Even a horizontal half wavelength dipole would be over 1km long. It, the towers and all other antennas were heavily burdened with sticky wet snow at the time. BC-306A Low Frequency Antenna Tuning Unit « on: March 04, 2007, 11:37:01 AM Essential knowledge to build a homebrew antenna tuner successfully. Antenna Transmatch tuner Links → . I only needed a new tuner for 630m to get on the air, reusing my 160m Marconi T antenna. Advertisement. " courtesy IK1HSS (larger image) "Corona at the end of the top hat. 21 and the SmartSDR v3. by W5JGV. A small window was replaced with a 630 meter Projects Links → . 5 Range Extender Outdoor How I got on 630 meters #Videos Mark Erdle ~ AE2EA. 630m tuning will be added in due course. 160M 1928 MOPA video demonstrating the automatic tuner on 630 meters: 73 Eric. 1 Dynamotor Unit Pe-73-C; 2 Radio Transmitter Bc-375-E; 3 Fig. Quantity: Sold individually. Most of our antennas will be very short compared to the 630 meter wave length and the bandwidth will be narrow. USA. Designed to be centered above a horizontal groundplane, this "HOA-friendly" antenna is This describes a ham radio 630 meter (475 KHz) home brew beacon transmitter and antenna matching system. It's finally done. The top shelf holds a homebrew T Antenna Tuner, a ANC-4 Noise Cancellor, a homebrew Noise Cancellor, a homebrew 630 Meter Transverter and a 233 Watt MOSFET 630 Some antenna tuners also include an SWR/power meter, antenna switch and/or a dummy load – combining several useful shack accessories into one box. AM BC stations are as He discusses receivers, transmitters, amplifiers, antenna tuning, and antennas for this band. I am getting an excellent match on all ham bands from 630 meters thru 6 meters, and great reports. Calif. 6000 Highway Advisory Radio Network, LIGHTNING LED Changeable Message Sign, Lowdown 630-Meter Band Amateur Radio Antenna, MGR. 1:1, the one on the radio is less than 1. What I came away with was an appreciation for what these devices do and a humility for the hams who hand built their own tuners. - the dissatisfaction I was having with my own antenna tuner. Low Power Operation. For amateur "back-yard" use, All groups and messages Antenna Transmatch tuner Links → . Uncategorized. The top-loading allows the vertical member to be shorter than the same frequency vertical antenna. I've rebuilt my 630m TX antenna and retuned it to 2200m. This is the same for both the vertical and horizontal sections. Home. NO3M, who also operates as W3CDX, reports 8 DXCC entities worked on the folded monopole, 80M unipole, 630M Station, 630 Meters, 630M Vertical antenna, Unipole antenna, 630 Meter Power Amp Topic: BC-306A Low Frequency Antenna Tuning Unit (Read 7845 times) 0 Members and 1 Guest are viewing this topic. The antenna tuner uses a sliding variometer to resonate the antenna, and an autotransformer wound on a toroid core to match the antenna resistance to 50 A functional antenna and what transmits on 630 meters? I already had a 160 meter Marconi T antenna, so that was simple. In reality, any losses from the variometer inefficiency Alpha DAS Digital Antenna Selector Amazing Selects upto 36 antennas: MX-304 antenna switch Like new Yaesu FC-30 automatic antenna tuner : Heathkit Grid Dip Meter with coil set GD-1B with 36 states worked on 630 meters, and 35 confirmed, including Hawaii and Alaska. Warranty: 1-year . Related artifacts Wireless. The Maximum power: 2000 W 160 – 10 meters, 500 W 630 meters, 100 W 2200 meters. Once tuned, the job is done and there is no need to endlessly tinker with a bucket variometer or other vintage tuner. 630M Amp. Tapping the front-panel button changes the display to both a digital power/SWR display and a bar graph SWR display. If you are interested in 630 Meters be sure to apply for authorization through the UTC for your station location. 16. The Titanic used a T-Antenna to transmit the emergency calls on the 200 kHz band. } MAJOR CHANGE. e. The 630-meter band was added to the amateur radio operator's band plan in the fall of 2017. Sudden reduction in side loads on the towers when the T fell In practice, that means you end up with an inverted L, or a T antenna. It uses an Arduino with an Si5351 chip to produce WSPR beacon signals. All Messages By This Member #1170 Wireless remote antenna tuner - More info coming soon 630M Station. Frits Geerligs PAØFRI FRI-Match; Peebles Originals Vintage Radio Kits and Parts; LED Tuning Indicator for QRP by PD7MAA; Resistive SWR Bridge for QRP ; ‘crossband’, while they listen on 630 but transmit on HF. I am going to invest in a MFJ-993B tuner as it is better suited to the tuning rigors of these antennas. 17. Contributing Member Offline Posts: 2135. Figure 4 represents one of the four elements. PD. It is a great performer connected to my IC-7300 thru an AH-4 tuner. 2017 Dec 28: New Hints and Kinks 1 & 2 for HP8640 2017 Jun 10: New New Hints and Kinks for HP8640 The top shelf holds a homebrew T Antenna Tuner, a ANC-4 Noise Cancellor, a homebrew Noise Cancellor, a homebrew 630 Meter Transverter and a 233 Watt MOSFET 630 Power Amplfier. and possibly 75/80 meters if you While the usual antenna tuner+VSWR meter would work fine, I decided to build a different piece of equipment that would facilitate matching the antenna and protecting the radio 630 meter lowpass; 630 meters; 70 cm; 70cm; 75 ohm; 75 ohm splitters in 50 ohm systems; 8 bit A/D converter; 8 pin AVR; 80 meter QRM; 80 meters; 8641; 86730; 87315; 10. 2018 Aug 30: New Zepp and 630M The New 630 to 10 Meter Antenna. Previous post JT9-2 Linux script Next post New 630m QSO distance world record set by VK4YB and NO3M 630 eter Antenna at 9RUTom Marconi T type antenna, 50 ft vertical , 4 wire cage to 3 wire top hat at 100 ft. With approximately 5 to 6 picofarads per meter of a relatively small antenna (inverted L with 10 meters vertically, and 40 meters horizontally) may have roughly 10 * 6 pF + 40 * 5 pF = 290 pF . 23 Release Notes I have done some receiving on 630 Meters with my 160 Meter inverted L with good results. Maker. Source of data-- Collector info (Sammler) Author; Model page created by a member from A. All antenna projects below 30MHz with some crossover into low VHF. Enhancements include: dual digital VFOs, 12 memories, full QSK, RIT, speech compressor, and noise blanker. Couldn't ask for more, and Brian Duerr was a great help with all my questions. Joined Jul 22, 2002 Messages 25,786 Location Bowie, Md. HamGadgets ID-O-Matic IV Repeater Controller (IDOM4) Probably a dumb question but - will most hf swr bridges work somewhat accurately on 630 meters and class D amplifiers? Need the latest SmartSDR, Power Genius, Tuner Genius and Antenna Genius Software? SmartSDR v3. , 500 mA max. All I needed was a new tuner. 00. Search 1300 Frenchtown Road • East Greenwich • RI 02818 USA A Southern Avionics SAC-SS250, 25 watt non-directional aeronautical beacon transmitter and antenna tuner in an on-line. The front end on receive eliminates the very strong AM broadcast signals that are normally a problem with many transceivers when connected to my 160m antenna. Better to avoid metals, even with insulation, close to the high voltage antenna ends. 460 in. See "Data change" for further contributors. An Antenna for 630 to 10 Meters. One is for 160 -10 meters, the other is for 6 meters and a third (RCA type) is for a separate optional receive antenna. It has been around since the early days of wireless. “I hear better than most on most bands,” he told Langridge, adding that he lives in a rural area 512 meters above sea level with few noise issues. The system’s Range Extender Outdoor Antenna and Tuner may be mounted at any height above the ground, due to the exclusive coaxial ITS. TOP OF PAGE. Antenna. One last notethe internal antenna tuner isn't mapped to work correctly on the 60m band, but the rig works great with an external antenna tuner or with a resonant antenna. 10 - 13 February 2011. Even under rough weather conditions, these units hold on well. TRANSVERTER FOR THE 630 METER BAND. Here is a description of the latest LF/MF TX antenna at N6LF. It puts out 12 Watts: 630 meter transmitter A Southern Avionics SAC-SS250, 25 watt non-directional aeronautical beacon transmitter and antenna tuner in an on-line The T-antenna acts as a vertical antenna that has capacitive top-loading and works like the inverted-L antenna. I have 42 States worked, and 3 DXCC on 630M, 5 states worked on 2200M. Yikes! A mess of wires! The transmitter is breadboarded while I try various ideas. Rev 1. Hope this helps some of you with your 756 to enjoy 60 meters. I recently purchased a Palstar Model BT1500A balanced L Antenna Switch Desktop Controller; Receive Antenna Signal Processor; Receive Antenna Switches; Shack. 50MHz spectrum up 100 - 150MHz converter to suit SDR using the Realtek (DVB-T) tuner dongle. If you decide to build a dipole, make sure that some type of isolation transformer is used at the antenna feed Several hours were spent yesterday finishing off the new 630m antenna matching transformer and installing the new loading coil with built-in variometer. This type of "full-size" antenna would actually exhibit a slight gain when compared Related Links: Antenna Comparison Chart: Antenna Siting Recommendations: Radio World article: "ISS HPR. post 26 Dec 2023. The MFJ-9982 The 1/2-wave 80-meter doublet with ladder line all the way to a 1:1 bifilar choke/balun in or near the tuner is a much better antenna for 80-10, provided you adjust the ladder line length to avoid the voltage and current anti-nodes (i. Weight: 16. finally 630 and 2200 are for the most hardcore users, and its pretty much WSPR beacons and thats it. A Phase Detector Automatic Antenna Tuner Controller for 600 Meters. 420. 2200 (and 630) Meters. VE7CNF 630m Transmitter . Antenna Details and Tuner. 2 loading coil will lower the resonant frequency of the antenna (adding the coil is adds induction in series The lack of commercial amateur radio equipment for the bands below 160 meters forces hams to get creative, and there are as many ways to get on 630 meters an Doublet (which is the same as a dipole, but with an open feedline). {uThe linear amplifier is more happy when the inbuilt SWR meter on the tuner is used rather than the one in the radio. It puts up with 300 Watts, and it has a front panel with Need the latest SmartSDR, Power Genius, Tuner Genius and Antenna Genius Software? SmartSDR v3. Next is a home built QRP 40-10 meter CW transceiver. 630 meter modified folded unipole antenna. 1 and the SmartSDR v2. Placed at the base of a tower or closest point to ground of an antenna will give a low impedance path to ground for an induced or direct lightning strike. Search for: April 14, 2025 RUZ Antenna; Building a T-Antenna; Suction Mount Antenna; Tape Measure VHF/UHF Yagi Antenna; Temporary Car Antenna Mount; Battery Information; Grounding and Bonding; BC-306A, Antenna Tuning Unit; Coverage 150 - 800 KHz, antenna variometer switch and antenna variometer control with lock funktion, used with BC-191 & BC-375, part of SCR-177. 1. It’s way better than I would have thought”, added Edgar. QSL cards. 0 kHz + WSPR audio offset. 5mH is needed to resonate the same antenna at 2200 meters. As it is now the internal tuner in my FT-991A is not happy on 75 and 20 meters but it can only handle SWRs of up to 3:1. 630 Meter Project It is a home brew WSPR beacon transmitter. Build the 80 M unipole then add the loading coil and vac-cap for the 160M or 630M bands. 23 and the SmartSDR v3. He even describes the easy UTC notification system that's required to operate here. 630M Station; Equipment; Vintage. Modes include SSB, CW, FM and AM. It’s great fun and gives me a good idea of how well I’m getting out. As shown in figures 4 and 5, the antenna is four identical wire antennas connected in parallel at the feedpoint. Most transceivers at my QTH need an external high-pass filter to keep AM broadcast stations from overloading on 160m. * Built-in automatic antenna tuner (160 to 6 meters) * Kenwood ARCP-590 Control Software * Kenwood ARHP-590 Radio Host Program for VOIP * TS-590SG is Kenwood Sky Command® II ready Antenna Tuning Unit BC-306-A, Connection Diagram. No more trudging out to the antenna tune in the dead of night to tweak the tuning. org antenna links * Kevin Loughlin's 630m magnetic loop (video) PS: I have written five books on Now active on 630/2200 meters using the TS-990 1mw out on the DRV port, into a 200 watt homebrew FET amplifier. More information about operating on the 630 meter band can be found on the I really like the idea of lower power and resident antennas - no tuners. As part of bringing 500 kc/s back to life, members of the Musick Point Radio Group built a Marconi Tee antenna, and erected it between the station’s two towers, a span of 90 metres, on 23 September 2009. 310 lbs. No Interest if paid in full in 6 mo on $149+ with PayPal Credit * Yaesu FC-40 Automatic-Matching 100-Memory Antenna Tuner for FT-897/857 Series Transceivers; Tigertronics SLUSB6PM SignaLink USB Interface; Top Rated. At that point the antenna is fed from standard coax from the shack. US $1,195. This allows tuning the Zepps for all other bands besides 20 and 15 meters for a low SWR including 80 meters. Tom WA3KLR. 18 . Consequently I started to really dig in and learn as much as I could about these mysterious magic boxes. The addition of a single turn loop in the feedline will make the feedline appear as a higher impedance. Transmitter without LP. 021 Digital Audio Management System, MXB. Here are a few LF antenna ideas to try: * N1DAY 630m/2200m antenna * VK5FQ 2200m antenna * K0LR computer modelling LowFER antennas A D-3000N antenna should do 11 meter right? Last edited: Jan 31, 2013. As well as all that wire at the top of the antenna, as molo1134 pointed out, you also need to build a monster sized loading coil at the bottom, usually of the variometer type. The base loading coil is 50 turns #12 on 4 inch PVC (150uh). Tuning will be critical, for maximum radiated power your antenna Now active on 630/2200 meters using the TS-990 1mw out on the DRV port, into a 200 watt homebrew FET amplifier. My 58-ft doublet, plus a ~530Ω open feedline, matches on all bands 80m-10m. RE 2. The following suggestions will reduce the difficulty in matching an antenna with a tuner: The best way to operate 160 with an 80 or 40 meter antenna is to load either or both feedline wires (in parallel) as a longwire. A short antenna tuner A short antenna tuner. Consider that a full-size 630 meter half-wave antenna The two outer wires are spaced half a meter (0. The antenna will KL7L 137kHz and 475kHz tuning aids - how to check your antenna is resonant (in phase) and its impedance is matched to 50 ohms; M0BMU scopematch QSOs on 630 meters are typically made using either FST-4 or CW. Build hf antenna tuner This page details several T-match tuners. Misc stuff station’s antenna system will exhibit different characteristics on different bands, this is a typical application for an antenna tuner. net Loop Antennas for 630 Meter Transmitting. We would like to show you a description here but the site won’t allow us. Coupled with an antenna tuner designed for open feedlines. What did I have that transmits on 475 kHz? Nothing ! A Google search located a transverter, 160m to 630m. 0990 AM Antenna Does a Quick Stand-In; Solving a problem for KNBI(AM) in Monterey. Radio Depth: 11. General Electric Co. riscvf ieqioc mqvsct zajog ndjoiq kqo pverto jgyhd oved jagtdojc vjql plgvxr yzest fagi nyuk