Just in case you are not a vet with the 850, is there a molex plug in the connector under the transmit coax connector?
On my Kenwoods it has to be there with 2 pins jumpered for the speaker to work.? Don¡¯t know if all configs need it but it took me a day to figure out that mine did.
?
73
Mike
?
?
On 2025-04-26 11:50 p.m., Mike Sullivan via wrote:
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.
?
<-- What is the exact model of this 850, is it a version 1 or version 2 repeater? - reason for asking is that there was a design issue with earlier V1's (floating inputs on the DSP chip), which caused the 3.3V regulator (I think!) to fold, thus the audio amp having insufficient supply voltage.
Despite this, you can also check for discriminator noise (with no RF signal applied) at pin 10 of the DB25, and once you inject a signal, you should see activity on this pin.? I would use a HT not a base station with antenna's so close!
The other question is how far off from the original RX frequency are you? - the internal BPF has a 3dB BW of abut 10MHz:
?
You will probably need to re-tune the RX (eventually), but for now, start with checking for noise and any sign of a signal on pin 10 of the rear DB25.
?
<Credit to Jeff, WN3A for tutoring me on this stuff!>.
?
Cheers,
Ramesh, VA3UV, WA3UV
?
