[TenTec] Argo 5 repair

[Gary J FollettDukes HiFi]

I have made up extender cables for the Argonaut 5 and have decided to at least TRY to fix it.

I tried the hard reset, no results.

It has excellent receive but, in transmit, it it puts out a signal of about 4.5 MHz regardless of band or VFO setting.

I made up a set of extender cables for the TX board so I can make measurements.

It seems like the radio is oscillating. Also, I am not certain I am getting proper level of TX from the DSP board to the TX board on pin 2 of the connector coming into the TX board. I can tell the difference between FM and SSB at the point before the 455 KHz filter but the signal seems unexpectedly low in amplitude (a few 10’s of millivolts or so).

I wondered if anyone has made up an RF voltage chart for this radio? That would make tracing the problem a lot easier.

Gary Follett