I have had 3 model 88’s.
Two have 5 setting knobs. The other has 4.
Top one I gave to a friend of mine.
He lives 1400+ miles away so
I don’t have access to that one.
Middle one I let a friend borrow.
He passed away and I’m not
getting that one back.
I do have the bottom one.
I have compared readings to see how
close one was to the other on several
coils and that is how I know the one I
still have reads low. Most of the coils
I test I don’t know what the readings
should be so it really doesn’t matter.
I would repair it if I could.
Here are some pictures of the inside
of the one I have that reads low. I
appreciate your detailed explanation
of what could possibly be the problem
with mine but my electrical skills only
qualify me to change light bulbs.
Tubs
Some very nice and tidy units you have there. Much cleaner than mine which I’ll be working on restoring in the future. Interesting see the 5th knob for the condenser capacity calibration the model 98 does not have that, the transformer does all the work and can’t be adjusted. My early unit attached below Serial # starting at 1000