Pilot TV-37U #2 Restoration

[Crist Rigott]

I have another TV-37U so while I'm at it I thought I'd do the second one. This one is serial number 210074. 1268 units later than the first one. Some differences are the HV caps are Bumble Bee caps.

It is also missing all the knobs, and it looks like it needs a new audio output transformer (Stancor A-3877, Merit A-2930, or a Chicago RO-8), and the speaker grille has 1 bar broken off, and I'll need 3 12AT7 tubes.

I removed the speaker and taped over the holes in the HV cover and took it to the car wash for cleaning. Then I dried it off the best I could with a towel and into the oven at 170 degrees F. for a couple of hours. Then all the controls will get a squirt of WD-40.

[Eric H]

Every one of these sets seem to have the heavy white corrosion on the plated parts (Zinc maybe, because Cadmium is usually yellow?) I thought it might be a reaction due to dissimilar metals, in this case the Aluminum chassis, but some of the parts, the speaker and CRT brackets, are mounted to Plastic. Maybe just normal deterioration after 70 years?

[Crist Rigott]

Originally Posted by Eric H

Every one of these sets seem to have the heavy white corrosion on the plated parts (Zinc maybe, because Cadmium is usually yellow?) I thought it might be a reaction due to dissimilar metals, in this case the Aluminum chassis, but some of the parts, the speaker and CRT brackets, are mounted to Plastic. Maybe just normal deterioration after 70 years?

Maybe.

[Crist Rigott]

Parts are all labeled and we are ready to go!

[MadMan]

It's just oxidization.