[TenTec] Orion Sub-Receiver Trouble

[TJ Sheffield]

On an intermittent basis my Orion sub-receiver will display approximately 
“five bars” of noise while the main receiver may show S-2.  Both receivers 
are on 20m at present.

If I tune the sub-receiver down to 13.000.000 the “five bars” of noise is 
still displayed and the hash is still heard in the sub-receiver.  If I tune 
to 12.999.900 the “five bars” of hash drops entirely and a more reasonable 
1-1/2 bars of “normal” background hiss is heard.

The sub-receiver noise at 13.000.000 and above sounds something like a 
mixture of high and low tones that are cycling, burbling and/or pulsing at a 
rapid rate.  Sorry I don’t have a more technical description for this noise! 
  Tuning to 12.999.900 and below the hash disappears and I hear the “normal” 
background hiss of a quiet band.

If the sub-receiver is above 13.000.000 and I cycle the main power switch 
off / on the condition persists.  If I tune to 12.999.990 and cycle the 
power the condition is “cured” but a noticeable “pop” is heard when rolling 
from 12.999.900 to 13.000.00 however the sub-receiver hash is gone.

When the sub-receiver noise is present the rig is not useable for split 
operation but the “cure” at least is available.  I’m running the latest 
firmware.

These observations will be cross-posted to “ditsnbits” but I though I’d 
mention it to the group.

Thanks very much,

TJ Sheffield, KL7TS
Anchorage, Alaska