[Hallicrafters] SX-122 IF Alignment

[Jeff]

Hi All -

Happy new owner of an SX-122.  It's in reasonably good shape and 
reconditioning nicely.  It has silver mica disease, so today's project 
will be drilling out the mica caps and replacing them with discrete 
components...

I have a question about the low IF alignment though, so hoping that 
there might be someone out there with memory or practical experience.  
The manual states that the low IF is 50 Kc.  When I set the generator 
there (URM-25D), I can get a peak on the VTVM on each of the 
transformers.  My question is this though:  All of the other 
Hallicrafters gear I've reconditioned (SX-101,SX-101A, SX-117, SX-100) 
that uses that low IF frequency has not been exactly at 50 KC (50.75, 
50.5, etc).


I'm using the BAMA manual to do the alignment, but it just seemed 
strange to me.  The receiver seems sensitive, but not as hot as the 
SX-101, and certainly not as the SX-117.

Can anyone share any alignment tips for the SX-122?  I know I'm going to 
have to do this all over again when I remove the mica sheets from the 
high IF cans.


Thanks!

Jeff

WB3JIH