[TenTec] Orion 565 Sub-Rcvr. Problem - Squealing Tone, no signal

[MadScientist1948]

From your description, it sounds like something in the synthesizer. It is not immediately apparent what part on the receiver board itself could cause that.

However, I do have a spare sub receiver board you could borrow to try if you wish. i’d need it back or $100 plus shipping for it.

It’s too bad that the synthesizers in the Orion are not the same. You could try taking the injection from the main receiver and running it through the L. O. input of the sub receiver.

If you have a signal generator, you could remove the TMP cable from the L. O. inputs, one-at-a-time, and set the generator to produce the proper frequency and amplitude of each. Then see if you can tune in signals by varying the generator.


Gary
> On Jun 20, 2018, at 6:10 PM, Steven Kline <skline4 at verizon.net> wrote:
> 
> Has anyone experienced squealing tone in sub-receiver (not 366 type) which varies as you rotate vfo.  Radio was re-capped and new battery.  Have performed ram clear and master reset consecutively several times.  When squealing tone occurs I can turn sub-vfo couple kHz and goes away … then just dead air no signal…. go another 5Khz or so and here comes squealing tone again.  It’s seems to be cyclical.  I’m not getting any discernible signals since this started last night.
> 
> Anyone have thoughts?
> 
> Thanks,
> Steve - W5JK
> _______________________________________________
> TenTec mailing list
> TenTec at contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec