You can align by ear but it will not be quite as accurate.
If aligning by ear do not start with IF transformers but rather osc & antenna trimmers. Set the osc trimmer so high end of band aligns close with the dial markings. Use antenna trimmer to peak up volume. If a radio has a padder adjust it for max volume at low end of the band.
Finally peak up IF Transformers for max volume. You can do this by ear or with a meter measuring for negative AVC voltage.
Norm
:Is there a technique for calibrating radios that uses a "by ear" method or is the only way to use a frequency generator and inject the IF frequency etc to adjust the filters??? I live in an apartment and don't have a shop and would like to know if it is possible or if there is a technique out there that needs no outboard gear?? Thanx Brian