[Hallicrafters] Re: More SX101 Drift Problem

[Edward B Richards]

Hi Bill;

Here I am again. Sounds normal to me. A small drift on AM is not very
noticeable as audio is derived from the difference in frequency between
the carrier and the sidebands. Since they all come from the transmitter,
they maintain their frequency relationship even when they drift. They all
drift together. Not distorted. On SSB even a small drift is bad as the
carrier is inserted by the receiver (BFO) but the when sideband drifts,
the difference frequency (audio frequency) changes, causing distortion.

73, Ed Richards K6UUZ
 

On Tue, 11 May 2004 21:59:11 -0500 "Bill Campbell" <wd4hen at bellsouth.net>
writes:
> Hi and thanks to all who replied.  First of all let me clarify, I 
> only
> replaced the paper caps (black beautys and tiny chefs) several were 
> bad
> simply by visual inspection.  I replaced the damp chaser, which is
> definitely working, and turned the radio from its side to its bottom 
> (normal
> operating position).  I allowed the radio to warm for a full hour.  
> Results,
> she drifts (back and forth, not up or down) in both upper and lower
> sidebands but not nearly as bad as before.  However, in the AM 
> position
> tuned to WWV, she just sat there, no discernable drift.  Radio has 
> been
> playing now for several hours on WWV with no adjustment necessary.  
> It
> appears the bfo is drifting.  Does this sound reasonable and has 
> anyone
> encountered this problem?  Thanks again for your input guys, I do 
> appreciate
> your assistance!
> 
> 73,
> 
> Bill - WD4HEN
> 
>