[Hallicrafters] S40 alignment help

[Edward B Richards]

Hi Brian;

Have you checked to make certain both signals are not coming out of your
generator ? I have not run across this in aligning several hundred
receivers. The Image would be 910 kc away not 50 kc. Since you say two
signals are present on all bands, I would suspect the generator. Try it
on another radio.

Another thought is the BFO is on and way off frequency. 

Another thought is one of the IF's is oscillating 50 kc away. Try tuning
the IF's with both signals present. If one or more adjustments pop and
whistle, the IF is oscillating. Good luck.

Now tell me why band 5 stops oscillating at the low end on the SX-42 I am
working on. The other 5 bands aligned good.

73, Ed Richards K6UUZ

On Tue, 16 Nov 2004 14:57:43 -0800 Brian Crawford
<Brian.Crawford at shaw.ca> writes:
> I am trying to RF align my S40 and am having difficulties 
> particularly at
> the 14 - 7 mc points (band 3).  I have done an 455kc IF alignment 
> (which
> seemed OK) but...
> when I put my SigGen at 14mc I get signals at 14mc and at about 14.5 
> both
> about the same strength and the same at about 7 & 6.6mc (although 
> the 7mc
> one may be very slightly weaker but I can't pull the 6.6 one up to 
> 7mc by
> adjusting the cap.)  Adjusting the SigGen strength or moving the 
> generator
> lead farther away doesn't help, they both disappear together.
> 
> Given these are about 500kc apart do I have a 455kc IF issue and if 
> so what
> should I be looking for.
> 
> The other bands seem better, the second signal is not very 
> noticeable if
> present at all.
> 
> Thanks all
> 
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