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Re: TKR-850 No Receive

 

On Sat, Apr 26, 2025 at 11:38 PM, Ramesh Dhami \(VA3UV\) wrote:
On 2025-04-26 11:33 p.m., Mike Sullivan via groups.io wrote:
Got a TKR-850 that was abandoned at a tower site.. powers on and
transmits fine (can transmit using CW ID button and getting 25w
output) but receive appears deaf, Busy light is staying on and can't
key it up with any amount of power. Tried both ham and GMRS
frequencies, both exhibit the same behavior. Checked all the usual
settings and can't get it to go away. Any ideas of anything else to
check before I say she's dead and just plan on using a mobile for receive?
<-- Hi Mike:? Have you been able to "read" the repeater using the
Kenwood programming software (i.e., to confirm he RX frequency)?

Can you hear anything via the local speaker (you do need the loop-back
connector plugged into the 15 pin molex connector / or you can carefully
use a jumper wire to enable the front speaker.

Do you have any test equipment (signal generator, RF test set, etc.)?

Ramesh, VA3UV, WA3UV

I have read it and programmed both a 70cm and a GMRS pair to test out. Both yield the same result, as stated above.

No audio at all. The antennas that the repeater and my base station are connected to are literally right next to each other, so there should be no problems at all.

Will be taking it to a friend to diagnose, just wanted to ask before I do so.


On Sat, Apr 26, 2025 at 11:41 PM, Jeremy Hansen wrote:

Are you saying the busy light stays on regardless of whether you're transmitting a test signal? (i.e. all of the time?)

If so, is there any audio being generated at the local speaker??? Have you programmed a function button to open the Squelch, and if so are you hearing RX noise when activated?

Jeremy K1LFK


On Sat, Apr 26, 2025, 10:33?PM Mike Sullivan via <Kn4imu=[email protected]> wrote:
Got a TKR-850 that was abandoned at a tower site.. powers on and transmits fine (can transmit using CW ID button and getting 25w output) but receive appears deaf, Busy light is staying on and can't key it up with any amount of power. Tried both ham and GMRS frequencies, both exhibit the same behavior. Checked all the usual settings and can't get it to go away. Any ideas of anything else to check before I say she's dead and just plan on using a mobile for receive?

Mike
Correct, comes on when the repeater goes on and stays on. No audio generated. I have done so, and don't hear anything. I did find some older topics regarding a FM IC going bad, which is common on these. Probably what's going on here.

Just checking all settings and making sure I'm not missing something stupid before diagnosing as a bad IC.

Mike
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