[R-390] BFO Drift?

[Roy Morgan]

On Dec 11, 2008, at 1:13 PM, ANTHONY CASORSO wrote:

> Thanks Tim. That is an excellent response. I am in fact operating on  
> a low band. I can easily check to see if the symptoms track a  
> specific crystal or if they go away above 8 Mhz.

If I remember  correctly some of the local oscillator crytals operate  
on two frequency bands, and none on three. Some on only one.  The  
right page in the manaul will tell you the facts.

The 17 MC crystal is used only on the 7.00 to 7.99 band and below.

Having another stable receiver handy is very useful for this kind of  
troubleshooting.  A bit of wire slipped into the crystal oscillator  
tube shield or nearby the tube if no shield will let you listen to the  
LO signal.

Do let us know what you find.

Roy

Roy Morgan
k1lky at earthlink.net
529 Cobb St.
Groton NY, 13073