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Kenwood TKR-830 won't repeat

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madlabs

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Hi All,

I have a TKR-830 here on the bench. I can't get it to repeat however. It receives a signal and audio can be heard through the speaker but it does not repeat. If you key up with the mic it transmits on the correct output frequency. It is acting as if it has a tone set which it is not receiving BUT it does not have a tone board. So it receives, the busy light lights but no TX. Any ideas?

Jonathan
 

domes

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The TKR-830 is not a "repeater". It is a (analog) Trunking Station. Just a transmitter & receiver designed to operate with an external LTR or MPT type trunking controller which handles the audio & repeater control functions. If you want to make a repeater out of the 830 you'll have to add some type of external controller/repeater panel with whatever coded squelch system you want. The TKR-840 is the real repeater version of the 830.
 

madlabs

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Aha! Well thanks for that. Pretty funny that Kenwood didn't know that. I did some probing around yesterday and couldn't find a COR type signal on the back, I'll have to look for that. Any idea what they would call that?
 

kayn1n32008

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Aha! Well thanks for that. Pretty funny that Kenwood didn't know that. I did some probing around yesterday and couldn't find a COR type signal on the back, I'll have to look for that. Any idea what they would call that?

Should be COR.


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madlabs

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Just probed the back again. The only two outputs that change upon RX is the RSSI (not usable for COR) and an output labeled SC (SQ control output). That seems usable, logic low upon RX, may be able to loop that directly to the PTT.
 

kayn1n32008

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Should be COR.


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05def7c16fbbfc156cb169ea4f076b5b.jpg


From the TKR-740 service manual

http://www.repeater-builder.com/kenwood/pdfs/tkr-740e-svc-man.pdf

Looks like pin 17 is COR. It’s called Squelch Control.



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kayn1n32008

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Just probed the back again. The only two outputs that change upon RX is the RSSI (not usable for COR) and an output labeled SC (SQ control output). That seems usable, logic low upon RX, may be able to loop that directly to the PTT.

Sorry was replying to you when you posted. SC=COR 0v when Signal present, 5v when squelch is closed.

I would suggest NOT looping it to the PTT, but using a repeater controller so you have things like a TOT, and the ability to adjust a hang timer, be able to have an ID ect.


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madlabs

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OK, two jumpers and it is repeating! Going to need to put a real controller there but we now have proof of life. Thanks!
 

kayn1n32008

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OK, two jumpers and it is repeating! Going to need to put a real controller there but we now have proof of life. Thanks!

Take a look at the service manual. There are voltages for the TX audio and RX audio levels.

That service manual will help you except it is for a VHF repeater instead of a UHF.


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madlabs

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Yeah, I'll use a proper controller. I'd like to put a tone on it if nothing else. It is going to be a GMRS repeater so no CWID required but I'll have the controller do it anyway. Ham, habits die hard.

Thanks for the help!
 
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