[Elecraft] Birdie on 6m with the RX port selected?

[Lance Collister, W7GJ]

Hello,

I just noticed something peculiar and I wonder if anyone else has noticed it, and/or 
anyone can suggest a solution.  I seem to have an unstable birdie on 50.126 when I 
select the RX ANT port (either with the Elecraft preamp, or my normal preamp here, 
which is an LNA CA50-T).  It is gone when I receive with a preamp going into the main 
antenna port.  The unstable birdie does not change when I rotate the antenna, which 
leads me to believe it is some strange cndx in the radio itself.  Any ideas on how to 
remove it (other than listen through the main XMIT/RECV antenna port)?  That is about 
the worst spot in the 6m band to have a birdie :-( TNX and 73, Lance
-- 
Lance Collister, W7GJ (ex: WN3GPL, WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8)
P.O. Box 73
Frenchtown, MT  59834  USA
QTH: DN27UB
TEL: (406) 626-5728
URL: http://www.bigskyspaces.com/w7gj
2m DXCC #11/6m DXCC #815