My philosophy on old rigs, is if they are picking up signals well, are in
frequency calibration with minor adjustment of oscillator trim, and signal
noise goes down when an antenna is disconnected on any band, there is
nothing to be gained by tweaking internal adjustments, and much to lose if
you goof up an alignment. Simply cleaning many science instruments which
have coatings of dust and grundge often brings them back to full calibration
without tweaking a pot, or trimmer cap, or IF can.
73, Stuart K5KVH
|