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Hey Guys, I know you're not in Southern California however, we've recently had the FCC issue Experimental Licenses to a company that is testing a Radar System with 10KW ERP causing interference to several Amateur Repeaters in the Los Angeles basin. The FCC Enforcement Bureau from the Cerritos Office was successful to get them off the air as we are Primary on the band. But, now the same company has received a Experimental License to conduct the same testing at the Yuma, Arizona proving grounds with an ERP of 7KW which will cause interference to 220 repeaters from Arizona to southern mountains bordering Imperial, San Diego, Riverside and even San Bernardino County. This is a serious threat to our spectrum and we need to protect it. If you were around during the UPS spectrum grab of 220-222MHz you'll know what I mean. I am the President of the 220 Spectrum Management Association which is the Radio Amateur organization who coordinates repeater channels in Southern California (www.220sma.org). Please check this out, if this can happen in LA, it can and left uncheck will anywhere else. John N. Hudson III, WA6HYQ e-mail: sdjakeblues@... iPhone: 6192648934

Hi all, I have the TPL PA6-1AE UHF repeater amp in stock here. Curious if anyone knows if the imput drive can be adjusted to support 10W drive instead of 5W? A radio tech looked at it and said that Kenwood TKR 850 repeaters don’t drive that amp well at 5 watts because the output at the low power setting bounces around and it can vary above 5W and fry the amp. If I can’t find any documentation on how to increase the drive input I will be looking for an amp that will accept 10W input, and have my current one up for sale. Thanks, Chad

Our DR-2X repeater failed to switch to DC today when we had a power failure. Red “DC” light is on but repeater is dead. It is connected to a 12v 390 ah automotive battery. Any ideas?

Does anyone have experience with both the Tektronix Y400 with YBA250 and YBT250 modules and the Anritsu Cell Master? I’m trying to decide on one for an entry level SA and VNA to use for radios, antenna systems and tuning duplexers. It’s not clear whether the Tektronix has a TG like the Anritsu and whether it would be suitable for tuning duplexers. I’m trying to determine whether I should lean towards one over the other. Any feedback would be greatly appreciated!

I have been trying to get my repeater to work on DC power but I think I'm doing something wrong, or have a wrong setting. The repeater works fine on AC. 900mhz with a tln3259A power supply, with the cables on it to connect to the DC system. When I apply 24+ volts to it, I can not get it to power on. Am I missing a setting in the CPS software or is there something else I need to do? The repeater powers fine from AC. Thank you

OK maybe slightly related if your repeater site is a popular SOTA location: <https://www.youtube.com/watch?v=1pERdo3uUos> I know the developer Ara N6ARA; will contact him about adding proper filtering so these things don't generate IMD at comm sites. ;) Bob NO6B

We are a new ham radio club (RRARC) in TX with currently 60 members living in a 55 and over retirement community. As you can imagine, we are tightly governed by HOA rules. We are about to install our repeater on the roof of the community clubhouse. The clubhouse is on a hill with line of sight to the north and east approximately 8 miles. To the west and south approximately 25 miles. Being new, we do not have a repeater pair allocation yet. Currently we are operating crossband, receiving on 144.650 and transmitting on 441.350. These are test frequencies until we can get a permanent installation site and do some ERP mappings in order to request a frequency allocation. Currently we are operating on a dual band antenna using a diplexer and a Yaesu DR-2x repeater. Here is the question and our plan. Since we will get one shot at antenna installation, we plan to install a Kenwood DB-408-B (450) antenna. It is 8' 5" tall. We plan to remove the top plug and install an ARX-2b Ringo on top. It is 12' 5" tall. We plan to receive on the Ringo and transmit on the DB-408. This will be a temporary solution until we and do site surveys on both 440 and 2mtr in order to request our allocation. Looking for opinions on how well this temporary crossband setup is going to work, using the top antenna for receive and the bottom for transmit with no diplexer since we'll have dual feed lines, and using the vertical stack to negate some desense. We will be likely using 20 watts. TIA Bill kg5ie

Does anyone have a comprehensive operation guide for it? All I could find is installation manuals at ics controllers. Thanks Robert

Friends, My 125W VHF Quantar has a CPN1048G Power Supply in it, but my documentation has nothing on that model power supply. I found some threads in this group with tables that suggest this unit has a battery charger feature and that is about all I know. It does have what looks like a high-power DC edge connector on the back panel, but no DC harness / pigtail. Thus, I have the following questions: 1. Does anyone have any documentation on it to share? 2. Does it have the battery revert feature and if so, does it charge the battery? 3. What type of battery would work with it? 4. What is the proper DC harness for it? 5. Any other advice on it? Thanks! Jeff KC8VFN

I have a programming cable I used to program a low power dash mount astro spectra. I have read that this cable is usable for programming a high power trunk mount astro spectra. I'm not sure about the (B+) power cabling. Do I need to connect the heavy gauge vehicle battery cable (high power battery cable) to the spectra and NOT use the small gauge (fused) wire on the low power programming cable. Will the astro 25 tuner ver. 5.04.00 program my astro spectra? I only require analog NB. No frills I appreciate any guidance. Tim AE7TH Vashon Is. Wa.

can anyone help with this I have a MMDVM STM32 with a Kenwood D700 it’s receiving but no audio coming from handheld anytone 878uviii plus I can see the signal strength full scale on both radios just no audio Robby/AA5AF

Hello Group, I am still looking for a repeater quality antenna, preferably a set of 4 exposed dipoles for a project in SW Fla. This is to replace a current antenna that is in service but needs to be replaced. I don’t mind driving to pickup the ‘right’ antenna of course. Should be something useable in the amateur VHF/2mtr spectrum of course. Thanks in advance for reading. – Mike, K4CVL

I have both of these duplexers available to replace an existing system. The site itself is a water tower with an existing DB224 that has been made available to me. It is mounted at the very top-center of the tank. There is a backup fire department repeater at the site on UHF. I don’t even think it’s plugged in. The tower also has 5G panels mounted all the way around the perimeter. Given that space is not a consideration and all things being equal, which of the subject duplexers would you choose to put behind an MSR-2000 running 50 – 60 watts out of the PA? I have experience with the WP-641, but not the Sinclair. 73, Mike WM4B

I’m looking for a schematic for a Motorola MSF 5000 UHF Repeater Amplifier 75w Model TLE2522A. if you have one, please let me know 73, …Gary, KE8O

Good evening all, I'm having difficulty reading two (very dirty) Icom FR-4000-3 repeaters that I recently acquired for rehab. My software is CS-F3000 version 1.1 and I am using a genuine OPC-478 cable with a homemade OPC-592 (mini-stereo to RJ-45) adapter. PC is Windows 10 with a known good usb-serial adapter. I've double checked the simple two-wire adapter pin out and am confident I have RJ-45 pins 2 and 7 properly terminated to the ring and sleeve of the mini-stereo. No communication between the radio and software. Is there anything special about putting the FR3/4000 series repeaters in "clone" or programming mode? No specific guidance in the owners and service manuals other than indicating power-on is all that's required (unless entering service mode, which has separate instructions). Any insights are greatly appreciated. Jeremy K1LFK

I’m looking for a 107.2 Hz Vibrasender for an MSR2000. It looks like either the KLN6210 or KLN6824 should work. 73, Mike WM4B