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Kenwood TKR 850-1 Ver.1 Repeater
- Thread starter N4ADI
- Start date
Set the repeat function in the channel information. There is a squelch selection in optional features, maybe it will get rid of the constant green led. Receive speaker audio needs a jumper plug in the white connector on the back.
I tried what you suggested with no luck. i finally put it on the bench the transmitter is a mess 3.2 khz off freq pl dev1.2 transmitter is not spurious at full power. I guess someone was playing with this repeater before I got it . time to go check voltages see where that leads me.
Joe (N4ADI)
Joe (N4ADI)
Is there something set for the DB25 on the back that has COR/PTT set to low? If nothing is connected, no voltage, PTT becomes constant.
I'd give it a good once over on the bench with the service manual.
I'd give it a good once over on the bench with the service manual.
Hooboy, sounds like you're going to be really into this. Sure sounds like someone was diddling where they weren't supposed to.
Not sure what you're going to find with a volt meter. I would do a full alignment with the proper test equipment. Do you have a service manual?
Not sure what you're going to find with a volt meter. I would do a full alignment with the proper test equipment. Do you have a service manual?
ok are you getting any key beeps to start with. lets start here to make sure local audio works. if no audio check for jumper on back of radio on molex. if you do have a jumper make sure jumper is pin out is correct for the local speaker audio. now if you have local audio but are not getting any audio on rf there is two main possibility it could be, first is that some one royally F***ed the radio tuning up or another thing i have seen on those is it lost base band audio. ether way it will need a full service and base band audio is not really cost effective to fix.
If he doesnt have discriminator audio, the speaker jumper is a mute point.
I had a early version trk-750 ,that would sometimes decide no audio..
read the radio, wrote the radio, and it took off playing, that was a long time ago
I had a early version trk-750 ,that would sometimes decide no audio..
read the radio, wrote the radio, and it took off playing, that was a long time ago
Well here is the update. I think this repeater was involved in a secondary lightning strike, the repeater had several components bad on the TX/RX board and several on the controller board behind the front panel. The repeater needed a complete alignment of the entire repeater, and the repeater is now up and running and meets factory spec. My question is that according to the manual you have to tune it so that the front end is broad and I can only assume that is because you can have 16 channels on the repeater with different frequencies and that way it will not be deaf on other frequencies. I chose to tune it on a specific repeater pair similar to a GE Mastr II front end. So I assume that means there is 2 ways to set up the repeater, on an individual frequency or broad?
normally you tune for best RX on the frequency that you are going to use it on. if you are using it as a multi ch base you would tune it a bit more broad band by sacrificing some sensitivity for a more broad band.
I have been told that if you don't follow the book precisely, especially in terms of L2 L4 L5 and produce the wave-form as shown in the manual, if you use it as a repeater you will pull the duplexer on the receive side out of tune complements of a high return loss.
yes that is correct it dose not need to be exactly the same just close to it. even with a analyzer i have yet to have one look as nice and clean as it is in the book it looks close but not exact. if you tune for best rx it is going to be just as good or very close to what is needed as that is essentially what you are doing anyway.
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