There is a 50 year old, or older, trick used by thousands of public safety repeaters for self-keying intermod. Use a different input and output PL. I've had public safety radio techs tell me it is

That's a moto sales thing. They use 120 deg, hold up their radio and another brand radio that uses 180, and when they unkey, the moto quiets on the RB, and the other brand doesn't, so they point to

It is always a good idea to look at it with 2 service monitors, one as the TX and another to watch the RX at the end. I don't know what difference it makes for tone pl 120 vs 180 degrees, but now

I agree with Jim's assessment that there isn't a reason not to have it enabled. Premium radios (Moto, Kenwood, Yaesu) work as expected. The Baofengs etc., don't typically, even if the CTCSS decoder

I have a surplus Hamtronics REP-100 on 220 if anyone needs one. I haven't had the time to check it out but it supposedly works. Let me know if you are interested and we can work out a deal. I

Jeff, TXRX is pretty ham-friendly. If you give them a call and tell them you are moving a duplexer from commercial to Ham and need new jumpers for the new frequencies they will likely sell you

This project will be very challenging. The UHF CB channels are spaced @ 12.5 kHz and the Tx to Rx spacing is 750 kHz You want to combine two very close frequencies in the 476 MHz range with amateur

There aren't too many situations where you would not want it. It would only be situations where you need the TX to drop immediately, like in packet or similar. There may be issues with it on voter

Sudipta, go to "repeterbuilders.com" web site all the different versions of ASTRON power supplies are there. As far as the 2SC5200's, while they are rated at the same 150w (only in the TO-264 package,

Option 2. Run 2 antennas 1tx 1rx with cans. Obviously minimum 60 ft vertical separation perfered. N3ssl

I have done enough research on the reverse burst setting to understand how it works and what it is intended to do, but am still not sure whether I should check the box or not. It will likely depend

Drew, In my experience if you have 350KHz spacing or more between transmit frequencies, you can do that with a good transmit combiner using 10"-12" pass cans and a dual port isolator. In some cases

Hi All My local radio club in Australia is setting up a new repeater site for both amateur VHF and UHF repeaters and two UHF CB repeaters. CB in Australia uses the UHF band, 476.4250 and 477.4125 MHz

I sometimes cuss at my spell checker, but then I realise it was probably made in US of A. Where do I go to get a good maths checker? LOL John VK4JKL

I was able to reverse engineer the receiver and the sensitivity is about .3uV. The Audio/COR has CD4016 quad switch where most of the connections terminate to the front row pins. It has a speaker

Originally wrote "...3 of their RXs: one 2M & two 220 MHz units." Later I remembered that we had a 3rd RX in service on 220, so went back & changed two to three. If any e-mail client supports

I really struggle with "new" math.  I'm sure that some day - I'll get it. <grin> If anyone has and docs - send then to me and I'll post them to the RB site. Kevin

So the JPLARC isn't the only one with ESP RXs. Yes we have a total of 3 of their RXs: one 2M & three 220 MHz units. The 2M & one of the 220 RXs are in service at a 7500' elevation site. The

I acquired more spare 222MHz repeater parts. The one on the right is a Hamtronics 222MHz transmitter. I have the user manual for it. The one in the middle is an audio/COR and the left is a 222MHz

notice 3 X 78 is 234 (very close to the 230) in other words the 34" cables may be intended to be an odd multiple of a quarter wavelength. That may be significant here.