04-17-2018, 07:38 AM
http://www.nostalgiaair.org/pagesbymodel...013581.pdf
The alignment instructions for the model 44 state that there are two trimmers on the tuning capacitor gang that are sealed and are not to be adjusted in the field. My tuning capacitor needs to be cleaned badly. I normally remove the mica insulators from the trimmers (if possible) and clean using my ultrasonic cleaner. But if this is done, then the trimmers would need to be reset. Is there information on how these two "don't touch" trimmers can be adjusted? Is some sort of special equipment needed? I had always assumed that something other than the normal fixed frequency generator used by Philco service was the limiting factor (vs a normal signal generator).
If field adjustment is REALLY not possible, then I suppose I will clean the capacitor with micas in place and not touch the two trimmers.
Any suggestions?
The alignment instructions for the model 44 state that there are two trimmers on the tuning capacitor gang that are sealed and are not to be adjusted in the field. My tuning capacitor needs to be cleaned badly. I normally remove the mica insulators from the trimmers (if possible) and clean using my ultrasonic cleaner. But if this is done, then the trimmers would need to be reset. Is there information on how these two "don't touch" trimmers can be adjusted? Is some sort of special equipment needed? I had always assumed that something other than the normal fixed frequency generator used by Philco service was the limiting factor (vs a normal signal generator).
If field adjustment is REALLY not possible, then I suppose I will clean the capacitor with micas in place and not touch the two trimmers.
Any suggestions?
