[Hammarlund] SP-600-JX-6

[wb3fau55 at neo.rr.com]

Folks, I got another question about the fixed freq operation.  As I can only guess,  how does one determine the freq of a crystal?  What I am asking is-  for a given freq,  below 7.4 mc,  do you add 455kc?  [or subtract?]  Then, above 7.4,  do you use 3.95 mc,  plus  or minus  the IF?  I know you folks know how to figure the xtal freq, for a given operating freq, so please enlighten me...tnx  Russ.