My next restoration victim, Silvertone

[Eric H]

I tested all the tubes, only one was bad.

The 4BQ7 in the tuner showed a short, there's a note from a tech on inside of the cabinet that says "4BS8=4BQ7" and sure enough, the tube chart shows a 4BS8 in that location.
I found a NOS 4BS8 to replace it but it too shows a slight short on my tester, possibly my tester is just wrong on this one, in any case I'm going to use the 4BS8 since that's what it originally came with.

I also gave the chassis a bath, it was filthy and some of the plated parts had that green Cadmium corrosion on them, I used some spray cleaner and a wire brush on the corroded parts, followed by a hot water bath, I avoided getting the flyback soaking wet. After that it went in the oven on the lowest setting of 170 for 15 minutes and then left it in another 30 minutes with the oven off, it came out sparkling clean!

I found this model in the 1956 Sears Wishbook catalog on http://www.wishbookweb.com/

Turns out the cabinet is Aluminum so what I thought was rust inside must just be 60 years of dirt and whatnot.

The tube shields are unusual on this set, I couldn't figure out how to remove them at first. They are two piece thin spring steel attached to the chassis, each half wraps two thirds of the way around the tube making a nice tight fit all around, you simply have to pull them apart and they open up exposing the tube, a really ingenious idea since it makes a good connection to the chassis and it holds the tube firmly in place.

Oh, and I found the Damper tube, hiding at the very bottom under the sweep tube, it's the usual 12AX4, you can just see the socket peeking out bottom right.