[Boatanchors] National HRO-7 IF/Xtal Filter Alignment

[Bill Stewart]

GM All and a Happy New Year, 
I have been working on and playing with a HRO-7. It works well, but the selectivity seems to be off a tad. 
Little or no attenuation on opposite side of zero-beat. The IF is spec'ed to be 456+/-2kc. I hooked up 
the sig. gen., as specified in the manual, and at first did not get a signal from the spkr. I tuned the SG 
until I found a sig., from the rcvr, at a SG freq around 438kc. Before I start turning screws, is this off-freq 
condx a sign of miss-alignment and hopefully can be adjusted back to 456kc or does this indicate the xtal is 
way off its intended freq. If that's the case, can the IF be re-tuned to 438kc and still work properly, including 
proper xtal filter action, etc. 

Tnx for any hints, suggestions etc.....73 de Bill K4JYS