I purchased a BCD436HP to get back into the scanner hobby. Miracle Whip <gasp> for 6 meters (fully extended, inductance cut out). I compared the mobile Larsen antenna to my Diamond RH77CA HT antenna. I know that I could probably ask some of the employees of my county's EMA about whether my idea will. 7 and 238. Diamond (Original) SRH77CA 144/440 MHz. #10. MPN: RH77CA $ 28. If so, then pick up the BNC version of that antenna. The RH77CA is basically a 1/4 wave whip with a small coil at the base. Dual-Band High Gain Handheld Antenna Rx: 120~900 MHz. Nice antenna but compared to my diamond rh77ca it's not quite as good but close . Apr 15, 2013 #2 dshafer1 said:I have a diamond rh77ca portable antenna for my gre 500 scanner. The bases screw on the the antenna. ScannerMaster is much cheaper on the antennas, but their shipping, via USPS Priority Mail adds $9. support boom for a144s5 sb-144r misc antenna accessories. I mainly use mine mounted in my vehicle with anexternal antena and it puls in. 00. Signal was pretty strong at times. I also got a PRO-96 for myself. The BC125AT is an old style scanner, although when it works, is pretty good, specifically for airband & HAM etc 144/400MHZ bands, In terms of such use case, the overall consensus I believe is Diamond RH77CA. Hand Held: Diamond RH77CA, or Radio Shack 800MHz scanner antenna, or Austin Condor, or Radio Shack telescoping BNC antenna. But the PSR-100 IMO is the superior scanner. The power is limited. Summary. 100% agree - Would recommend. The signalstick is almost 20% longer. Universal Radio has the Remtronix version in both SMA and BNC for $21. com. Why?There is your answer right there. My Lists. The Diamond RH77CA (16" tall) would be my choice for your other needs: 148-174 VHF High Band Police and Sherriff 108-137 Aircraft 420-450 Amature Band 70 cm But it doesn't perform very well in the 700-900 MHz range. Read honest and unbiased product reviews from our users. The Diamond antenna is of course an HT antenna, so it's optimized for HT use. As a result of this exceptional coverage, we actually sell more of these antennas to scanner listeners than hams! So after a couple of days my results are fairly close to others. The contacts didn't last long, but I was very excited to hear the STS on a hand-held from over a hundred miles away. What I noticed is that with the Diamond antenna on the HT inside the truck, it consistently pulls in more signal (on both bands) than the Larsen mobile outside the truck. #2. That's what i've used on my BC125at for many years. I have both the RH77CA and the SRH77CA antennas. Joined Jul 2, 2013 Messages 197 Location Kingman Arizona. 5 miles from a big class bravo international airport and I want to be able to pick up the tower frequency with my Uniden BC125AT. It is a 1/4 wave on 2 meters and a 1/2 wave on 440. Reactions: RCjim. If you're listening to 800MHz, they're the best antenna I've tested. While it's available in both an SMA mount as well as a BNC, you'd need to get the BNC version, and use the SMA->BNC adapter that came with the scanner. It does a fantastic job on Civil and MilAir, VHF Hi, and UHF. The same antenna, on Amazon, is sourced from Zip Scanners (as a marketplace dealer), with a price of $45. Now if you really want performance increase you would have to go with a SlimJim or an Diamond RH-770 1/2 wave extendable. It also does well on 700/800MHz for nearby or stronger systems. David Kb7uns. I will compare the OPEK HR-603VU to the Diamond RH77CA. Using two identical antennas is best, because you can take the port 1 ---> port 2 loss figure and divide it by two to determine the performance of one antenna. Reviews: 63. xxxx)? epbernstein, The Diamond RH77CA antenna has done a great job for me on Uhf (Dallas city public safety is all conventional Uhf, 450 & 460Mhf). Flexible Whip For ALINCO DJ-G29T: SRH519: Dual-band 2m/70cm. Messages. The RH77CA has the SMA connector one needs for the SDS100. I recently resurrected my Diamond RH77CA. 99 for next day delivery so I went for it. I want to mainly monitor CHP (39-42 MHz), VHF govt, UHF govt, LAPD (APCO-25)/LASO (482-510 MHz), and 800-900 MHz conv and trunked systems. (Gain: 440 Mhz. 475, etc) make an excellent test. how do i stop it. We are not accepting backorders. The Diamond RH77CA was my choice to replace the stock antenna on my Kenwood TH-78A handheld dual band HT. Joined Dec 19, 2002 Messages 1,807. It can additionally receive these bands: 120, 150, 300, 450, 800 and 900 MHz. eaf 1956: What kind of scanner and antenna combo are you using? KSP can be a little finicky. It has a much louder volume and with a diamond RH77CA antenna, reception is very good. (Gain: 440 Mhz. Much better on Vhf, very good on Uhf, and fairly good on 700/800MHz. Messages. Diamond Antennas have an excellent reputation within the Amateur Radio community for very high quality products, antennas are what they do and I have a whole bunch of them, they are all properly tuned. The RH77CA is cheaper, and its easier to carry around. *#1 system is incomplete in the RRef database. . 95. $22. Flexible. But yet when I have the antenna that came with the BCT15 at home, I swear, it seems to actually get. I have one for my BC125AT I use for monitoring railroad frequencies when I'm out. The stock antenna is actually fairly good, however diamond srj77ca (or rh77ca and use bnc adapter) is a great antenna. $27. The antenna that I tried has the Diamond (RH77CA) brand on it, and I’m telling you it owns up to the brand name. I like the flex-ability of the 519, but I also like the gain of the 77. The new Remtronix REM-VU100S (shown right) is the same, but terminates. Reactions: chill30240, N9JCQ and dispatch235. I have used it, and tested it pretty well to give these results. I am also waiting to receive the rh77ca I ordered yesterday. Specifications: Bands:2m/70cm + receive up to 900 MHz, *Gain (relative):+6dB, Watts:10, Height:15" Connector: SMA. I though that for the most part you want it tuned to what you are scanning, but I tend to scan everything :p Looking for the best. It is optimized for these bands as well as being vertically polarized and omni directional. Adds 45 lbs, but is self transporting. This triband antenna covers the 136-174, 420-470, and 800-900mhz bands. I’m using the Diamond RH77CA. Glad the OP got it working! G. BC125AT and RH77CA. Fax: 888-206-0582. Frankhappyg Member. My all around favorite has been the Diamond RH77CA which is also a ham antenna for Vhf/Uhf but also touted as being a good all around scanner antenna However, for me, the RH77CA at approx. Consider buying a Diamond RH77CA antenna (which has a BNC connector). I have the Diamond RH77CA antenna and the Radio Shack Deluxe Antenna and the main one that comes with my BCT15. While driving past the airports it seems like I need to be 1-2 miles away just to pick up ATC audio. Will this increase my reception with both trunking and conventional channels. Premier Aircraft Sales is a global leader in the sale of new and preowned piston and turbine aircraft as well as turbine helicopters. The antenna that I tried has the Diamond (RH77CA) brand on it, and I’m telling you it owns up to the brand name. Apparently the only difference is that the Tri Band adds receive capability up to 1300 MHz and beyond, whereas the RH77CA has receive. 95. The RH77CA is basically a 1/4 wave whip with a small coil at the base. 59. #2. All you need to do is enter a frequency and wait a bit. Increase the performance on your handheld or wideband scanner with a Diamond® SR Series antenna. Ok but not optimal for aircraft. Increase the performance on your handheld or wideband scanner with a Diamond® SR Series antenna. The diamond RH77CA works well on the hand helds. 7) Diamond SG-2000HD: 6: 2013-10-24: 89. I would recommend getting the Diamond branded version, even so. So finally got a BCD396T. From. $26. Diamond RH77CA with BNC adapter. Dog: Luna. DIAMOND SRH77CA 144 / 440 MHz TX 120 / 150 / 300 / 800 MHz HT & Scanner Antenna - 15 Inches Tall - SMA Connector. A good 1/4 wave mobile antenna on the car makes a big difference and can be used for VHF, UHF and. diamond. Description: 15" long, male SMA connector, flexible dual-band antenna for handheld transceivers. Dual-Band activity isn’t what it used to be, but this radio is still a bang for the buck. Yep, but don't count on airband enthusiasts and railfans grabbing up SDS's. I wouldn't expect the RH77CA mounted on the roof to out perform the 1/4 wave whip, at least in any amount that you would notice. Tweet Current Stock Status At. Weighs about 1/3 as much a a matter of fact. I'm a little skittish about having the RH77CA on my handheld on my belt at times. The SDS100 is a handheld and the SDS200 is a base mobile. Last but not least on this list is the Diamond (Original) SRH77CA. At risk of sounding really stupid ( if I already havn't before here at Radio Reference ). $144. Dual-Band High Gain Handheld Antenna Rx: 120~900 MHz. 00 on commercial UHF. But it is a great antenna for my needs. Gave his. ago. de784 Member. Lapidary Equipment. While I own both the 125AT and the Diamond RH77CA and they are a good combination, I would hate for you to possibly throw good money after bad. Product is in production Feb 25, 2015. Joined Apr 11, 2005 Messages 2,151 Location Land of 10,000 taxes. MSRP: 24. When connected to the base antenna, I picked up a couple analog conversations that the 536 completely missed. Reactions: DanLP456I have a nice diamond RH77CA that I use with my 2m HT transceiver but I need an adapter to try it w/ the SDSView attachment 135226. i dont care about the price. The Diamond RHC77A is by design an antenna tuned to work best for transmitting at 146 and 435 MHz (the center of the 2M and 440 MHz bands basically) - that doesn't mean it won't work fantastic as a receiving antenna on those bands, and slightly outside of them as well including pretty good/great performance on the 800 MHz bands (I. #19. (Gain: 440 Mhz. David Kb7uns. The SLIM DUCK is a flexible rubber duck made tough enough for military. mauiblue Member. Wideband Discone Antenna. Find helpful customer reviews and review ratings for Diamond (Original) RH77CA 144/440 MHz. g. Okay, based on the advice here and my own research, I decided to buy the Uniden BC125AT and the Diamond RH77CA. sb430r. A night and day difference – especially with my worst-build-quality-ever antenna – the Pryme AL 800. #4. This Remtronix antenna is the same item (they manufacture the one RadioShack sells). Pro-83 with RS Deluxe VHF/UHF antenna for my town and surrounding towns. Adds 5 dB gain to all antennas. 99; Description: Dual-Band HT/Scanner Antenna (BNC) Gain: 2. I never gave it a real chance. It will do poorly on low band. I know the RH77CA was designed to transmit in the 144-148 MHz and the 440 MHz bands, but I wonder if it would be able to transmit on 154 MHz and if it did, then I was wondering if the RH77CA would help to boost the range of my handheld. They all sweep the same and were best at 150 MHz and 450 MHz. The smaller Nagoya UT-108UV had opposite readings: 1. The RH77CA can be purcahsed from ham radio dealers on line for just a little more than what Radio Shack charges for their. RH77CA HT/Scanner Antenna. This triband antenna covers the 136-174, 420-470, and 800-900mhz bands. SMA male base. Unless you extend it all the way, it can be much shorter than the RH77CA. 145 Union Pacific Irving-160. Diamond RH77CA is BNC male antenna. You'll find many threads about an ops personal preference. 800-903-8402. 95 plus $6. Diamond RH77CA. I know the Diamond RH77CA antenna is the gold standard for the BC125AT scanner but I'm looking for an antenna and a NMO magnetic mount that can be easily attached to and removed from the roof of a rental car. I live and operate in the foothills of N/E San Diego County. Flexible Slim Design. Smiley 5/8 SLIM DUCK 160 MHZ Antenna. When it arrived I excitedly put it on and was suddenly not excited, as I was not getting any better reception. I compared both 2M and 70CM reception. beat you too it. Same misspelling. It is far less bulky than the Diamond antenna. Maybe I could put the Diamond RH77CA on the Pro-79 and get a new antenna for my Pro-106? Also, do you know whether Desk Mount for Two Portable Scanners is a good home setup desk mount if I have two handheld scanners which I will/am using as base scanners? Thanks so much! Last edited: Dec 17, 2009. 47 carats, not the complete 1. They have been my go-to airband antennas for 10 to 20 years. 2. . (604) 321-3200. Diamond (Original) SRH77CA 144/440 MHz. 1. Engine 27 was just dispatched with Roseville for a crash on I-80 and was told by Fire Dispatch to contact Roseville on Roseville Fire Tac 4 and engine 27 told dispatch they were no longer able to operate on Roseville's 800 system and would come up on Roseville Fire VHF. CStarr59 said: I've had both scanners and the PSR-100 is a better unit. CW Paddles: CW Morse N0SA SP4. Trapped Dipole. Dual-Band. This rubber duck antenna is longer than your typical stock antenna at 9 inches. Diamond RH77CA Dual Band with BNC - Bands:: 2m/70cm + Receive up to 900MHz; *Gain (relative):: +6dB; Watts:: 10; Height:: 15"; Connector: BNC MaleRemarks: Diamond. Remarks: Works well with 150-162 MHz HT's. 620 Union Pacific DFW Sub-160. The SDS100 has a smaller RF circuit board than the older models, so you've got less counterpoise for a whip antenna that requires a ground plane. Santa Ynez, CA. The RH77CA is basically a 2 Meter/ 440 antenna. plus some good quality coax cable to match, Don't forget batteries, Panasonic Enelopes or Pro. I may try to find a o-ring to fit it later. 7" stubby, Comet CH-32, Maldol MH-209, RS-800, Diamond RH-77CA, and now have just ordered a Maldol AL-500H for better air. azbearhuntr • 3 yr. Last item to show for the day. I read on a post from 2006 that the Diamond RH77CA is the best for railroading but I was wondering if there is a better magnetic. Currently, I'm using the diamond rh77ca antenna but I cant pick up the actual ATC, only planes when they pass by. i am using a telephone dsl external modem. I have searched and read many good reviews on the Diamond RH77CA/RH771. It is a 1/4 wave on 2 meters and a 1/2 wave on 440. . 635 Union Pacific Mineola Sub-161. Jan 14, 2023 #3 Whiskey3JMC said: Welcome to the RR forums. Diamond RH77CA. Programming for CHP is easy, they use single frequency analog in the 42 mhz range (as opposed to trunking systems which use banks of frequencies and talkgroups). Less than optimal on 700/800 MHz. I have also found the RS telescopic antenna with center loading coil is good all around antenna, and in fact works well for me even down on 39-45 Mhz where Calif Highway Patrol (CHP) mostly operates. It is not a bad antenna for RX right around 150/450/750~800 MHz. Joined Mar 21, 2008 Messages 3,042 Location Michigan. D3000N. The RH77CA has made a noticeable difference to me in both transmit and receive versus the stock duck on my VX-5R. I have a Uniden BC125AT with a Diamond RH77CA antenna. Dont let the size fool you, it performed very close to the Diamond RH77CA antenna on 2M ! It also recieves Shortwave radio frequencies better than the stock antenna, but not as well as the RH77CA in this case. how do i stop computer modem interference. 15dBi (430 MHz) Max Power: 50W (Watts) Impedance: 50 Ohm Length: 30 cm Weight: 40g Connector: BNC 1/4 wave length (144 MHz), 1/2 wave length (430 MHz) and finally Made in Japan. 7 on 70cm. And, yes, the RH77CA will trounce the performance of the stock BC-125ATantenna. Dual-Band High Gain Handheld Antenna Rx: 120~900 MHz. Still, it does sort of work up around 750~800 MHz as well. Fax: 888-206-0582. I'm using a BCD396XT with a Diamond RH77CA antenna. Feb 2, 2022. I`m about 20 miles from Hardwood bombing range. You could most likely get a better deal on the PSR-100 online. Why not look into a Diamond RH77CA. Less than optimal on 700/800 MHz. With 800Mhz trunking 'hits' are happening far more often, and the signals are nearly all 4 bars instead of the 2-3 bars I generally get. whether the scanner is 5 feet or 10 feet across the room i get the interference. Tune in to our selection of handheld and scanner antennas for 900 MHz, 220 MHz, 23-centimeter, 33-centimeter, 70-centimeter, and 2-meter operation. It's OK for 700-800MHz but for that work I go with Radio Shack's RS-800 or Remtronix equivalent. This is a dedicated Tri-band antenna for VHF/UHF/900. The NOAA channels (162. Vehicle setup-Uniden SR30c with a Diamond rh77ca BNSF Road-161. 115. 160 KCS Road Whiterock junction-160. As a result of this exceptional coverage, we actually sell more of these antennas to scanner listeners than hams! Buy SRH77CA SRH77 SRH-77 Diamond (Original) SRH77CA 144/440 MHz. Ok but not optimal for aircraft. I gave one away to a friend and then realized I needed that extra and had another one shipped. While it is sold as a transmit antenna for amateur radio handhelds, it works well enough as a RX antenna considering its size. It's the same as the PSR-100 just rebadged for RS and less a charger. 4. If your scanner is missing C1, reception is primarily affected if you're using the stock antenna or something similarly short. I read on a post from 2006 that the Diamond RH77CA is the best for railroading but I was wondering if there is a better magnetic. Larsen does ok if I am at a higher elevation ( class c rv with magnetic mount on hood) but I have trouble picking up noaa. Dual-Band High Gain Handheld Antenna Rx: 120~900 MHz. *Gain (relative): +6dB. Sapphire is famously associated with blue, but that's not its only color. Just a great simple scanner. 95. Feb 25, 2015. The same goes for the SDS200; the telescoping factory antenna drops off below about 110MHz when fully extended, as does the RH77CA. Feb 5, 2006. This is probably high gain dual band ht antenna from a reputed brand, and even though it is a little more expensive than the rest, its performance is unmatched. The Diamond RH77CA is an HT antenna for transmit on 2 meters and 440 MHz. 17m Loading Coil for HV7A & MV3A. Find this Ring. The RH77CA is a good antenna, especially for Vhf & Uhf. 2. The antenna does have a slight bend to it which just doesn't seem to want to go completely straight any longer. The OP is asking about a Diamond SRH77CA, which is a 144/440 antenna. My main area of interest is in the railroad band and VHF-Hi police / fire too. In many areas, two or three different signals may be available. SRH77CA Dualband HT/Scanner Antenna. Mark. Contact one of your local for current price & availability. (Gain: 440 Mhz. That eliminates the problem of figuring out a calibrated reference antenna, and averages out sample variation a little bit. (Gain: 440 Mhz. Fast shipping. . Buy Diamond Antennas at GPSCentral. I have entered some groups and have the proper TGIG assigned. It's great for VHF-hi, great for UHF, as good as can be expected for VHF-lo and no better than the antenna that came. 5. Regarding your programming question. After reading some recommendations on antennas I bought a Diamond RH77CA. Quad / Multiband HF-VHF. 03. Diamond X50A Dual Band Base Antenna - 5. Diamond Antenna RH77CA Diamond Antenna Dual-Band HT Antennas | DX Engineering Free Shipping - Diamond Antenna Dual-Band HT Antennas with qualifying orders of $99. Even the new Diamond RH77CA antenna on the 436HP is pulling in stuff much farther away now, the one pesky analog frequency I monitor the most (County FD dispatch @154. Manufacturer's Website. Specifications: Bands: 2m/70cm + receive up to 900MHz. $31. Unit 206. Product is in production Diamond Antenna RH77CA. . It will do poorly on low band. We would like to show you a description here but the site won’t allow us. Diamond RH3. 27 mHz, 50 mHz and 70 mHz will not be a problem for this antenna. I also have the RH77ca, and it is better on lower frequecies, so as usual, it all depends on what you want to listening to. The NOAA channels (162. Dual-Band High. Dual-Band High Gain Handheld Antenna Rx: 120~900 MHz. Jul 5, 2017 #4The only difference would be the extra flexibility of the SignalStick. 15dBi (430 MHz) Max Power: 50W (Watts). White sapphire is actually much cheaper than blue and has become a popular natural alternative to diamond. out of stock. . Description: 15" long, male SMA connector, flexible dual-band antenna for handheld transceivers. Diamond RH77CA SRH77CA Antenna -- is what was recommended 5 years ago on this forum. HRO carries them by the handful. May 31, 2007 #16I have used a PRO-43 with a Larsen KD4-150/450 commercial HT antenna, and I've used a PRO-97 with a Diamond RH77CA. The Diamond RH77CA was my choice to replace the stock antenna on my Kenwood TH-78A handheld dual band HT. Very popular scanner antenna. Like they're standing right next to me. It appears to be the standard Uniden duck with a slightly altered base for weatherproofing. Keep in mind, though, that lab-made white sapphire is also available. $28. Reviews. I agree with the above post - the RS800 is a good antenna - but for 800MHZ. It's also about 4" shorter than the Maldol AL-500H, which is a consideration when using a hand-held. Dec 2, 2004 #3 Take a look at these 2 antennas. 1,440. #4. It will cover other bands, and there are more antenna threads here than you can shake a stick at, but the. Engineered and constructed in Japan, the Remtronix 842 is as good as its 800mhz formidable predecessor, the Remtronix '800', and even. Hi guys I just moved not far from credit Vally hospital and was wondering how good I would be able to pick up the repeater a with my Diamond RH77CA which I already have purchased and my Uniden BC125AT I'm looking at getting. One additional note is that while the antenna I ordered was tuned for the 160 mhz band, it gives excellent performance in the 154-155 vhf-hi public safety frequencies as well. Agreed! Even the new Diamond RH77CA antenna on the 436HP is pulling in stuff much farther away now, the one pesky analog frequency I monitor the most (County FD dispatch @154. Since it didn't receive that great when on the road, I ended up with a larsen multiband on a magnetic mount which seems to do much better when moving. Take that Pro-404 and put a diamond RH77CA antenna on it and you won't believe how good it works. Diamond RH77CA HT/Scanner Antenna - Black (42) Total Ratings 42. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright. (Gain: 440 Mhz. White sapphire is actually much cheaper than blue and has become a popular natural alternative to diamond. 3. I've noticed that the stock antenna that comes with the scanner could be better. But I’m not adverse to using the supplied SMA/BNC adapter if the SMA version of the Diamond antenna doesn’t fit, and ordering the Diamond RH77CA (BNC) antenna instead. Joined Jul 17, 2006 Messages 192 Location North Carolina. 5. Reactions: trauts14. I'm using it with my PSR 500, trying it with my RS 800 antenna and the Diamond RH77CA. The 771 is for transmitting on 2 and 440 and receive only on the rest - same as the 77CA. Pro-97 with Diamond RH77CA on a suction cup mount. While driving past the airports it seems like I need to be 1-2 miles away just to pick up ATC audio. diamond. The Diamond Antenna SRH77CA / SRJ77CA / RH77CA is a dual band 2m/70cm ht antenna for portable handheld amateur two way radios. Similar threads. . The SDS100 is good enough to reliably receive systems inside their intended coverage area, and GPS + Location Control beats pretty. 5 miles from a big class bravo international airport and I want to be able to pick up the tower frequency with my Uniden BC125AT. Be sure to use a Diamond RH77CA antenna. Wow! Unreal, the difference. The antenna will make a difference. Premier Aircraft Sales is a global leader in the sale of new and preowned piston and turbine aircraft as well as turbine helicopters. Buy SRH77CA SRH77 SRH-77 Diamond (Original) SRH77CA 144/440 MHz. #2. ago. Several years ago, the 15" flexible antenna was in very short supply stateside. F. That's true, but it's actually a dual-band HAM/Amateur radio antenna, tuned for 2-Meter & 440 MHz. High quality, high gain + receive up to 900 MHz HT antenna. 2. N. This isn't so much a problem as it is curiosity, but I'm using the BNC Diamond RH77CA on my BCD396; of course using the SMA->BNC adapter. 5 inches (35 cm) tall and weighs about 1 ounce (30 g). Diamond Antenna Dual-Band HT Antennas are a quality and cost-effective solution. The new antenna seems to work well and signals are clearer. DHAS12 Member. Review Summary For : Diamond SRH77CA Dual Band (2 m /70 CM) HT Antenna; Reviews: 63 MSRP: 29. The one above is a monster, and is just too big for my uses. ka3aaa Member. 73 Greg Clearwater/Dunedin, FLGet the Diamond RH77CA. Diamond (Original) RH77CA 144/440 MHz. The BC72XLT is a much smaller unit and if thats what you are looking for then get what works for you. 15 dBi, Max Power: 10. Joined Feb 13, 2014 Messages 3,301 Reaction score 6,820Even works in the CB and aircraft bands. Diamond Antenna RH77CA HT/Scanner Antenna quantity. Recommend the Diamond RH77CA for an all around antenna even though it is very LONG. ones I had before were like that until today when I finally took delivery of a Diamond Antenna Coaxial Adapters BNCJ-SMAP. Dosster. Can anybody recommend a better hand held antenna? Height is not too much of an issue, and neither is price. Diamond® Antennas are sold through authorized dealers.