|
You can do both FM and AM alignments by ear (assuming you can get a station to pass to the speaker). Peak the RF amp adjustment (by adjusting the point the slug mounts to the board by turning the slug). Compare the reported freq of a station to the dial indicator and if substantially off tune towards the correct dial marking (till station becomes weak) and adjust osc for best reception walk dial and osc over till you have the station and correct indication (make sure you have stations on bottom and top of the band if you don't then the dial pointer is misaligned with the string and you may have walked the osc away from the correct value)...Readjust RF amp slug after osc if needed. Peak IFs on weak station for max volume and adjust FM detector for minimum distortion...If distortion still present reduce IF gain and try to get lower distortion thru staggering the IF a bit.
I actually have alignment gear and skill, but usually, do things by ear unless something is being difficult or is overly complex/finicky.
|