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

[Steven Kline]

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