Westinghouse H-223 restoration
 

A customer dropped off this lovely Westy H-223 with original stand for restoration.

It's a crying shame someone cut a hole in the back because otherwise it is pristine. Looks like they used a saw. Why I can't imagine.

Here's a video on the initial checkout: https://youtu.be/VagQF4KD8tM

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It has a rather unusual interlock that fits into the top of the chassis.
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CRT tests good :)
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Here's a look at the chassis.
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This thing is a real trip underneath. It does not use a flyback! The horizontal yoke windings are driven directly by a pair of 7A5 tubes.
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The 7A5s are in the bottom left above that strange looking transformer.
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The HV is generated by an RF supply similar to electrostatic sets.
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Is that a 10BP4? How does the CRT test?

Yes, it tests good.

I got one of those chassis from a fellow electrician. They were cleaning out the old family home, when it was sold. IIRC, the CRT was bad and the cabinet was missing. It did come was a four tube amplifier, that was original. I looked it over , pulled the tubes and dumped the rest! I kept the small amp, :D:
At the time, I looked like a strange design, HV osc, horiz deflection! :scratch2:

I think I recall this set being desirable for the ability to change the scanning rates without affecting EHT crt voltage. Only one of two postwar magnetic deflection sets I recall that did not use flyback EHT, the other had a prewar brute force AC transformer source and one of the first post-war US production sets, don't recall make model.
Germany had at least one flyback EHT set ca 1939, the E-1 as a "peoples" television receiver.
https://www.earlytelevision.org/Etzold/e1-e.html

It would be interesting trying to get it to scan 720P or 1080i.

and so it begins...

Just by chance I was recently given a pile of Sams photofacts that included this set :)

I wonder if Philco was involved with this chassis design since it has their typical rubber corner shock mounts. Also has a couple loctal tubes.
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Very solid construction. Handy that they stamped all the control functions into the chassis.
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The 10BP4 and almost all the tubes are Westinghouse branded
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Time for a slow, controlled power up.
After about an hour, I got up to 110 volts and was treated with this on the screen.
Very strange to have high voltage with no horizontal deflection. A side effect of the odd design.
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Probably also why there are some spots burned into the screen.
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All three 12AU7s were nearly dead. Replacing them rested in a raster of sorts.
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Adjusting the width freaked the set out a bit.
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A few more weak IF tubes replaced and control tweaking got me this. There is some faint sound and a faint image.
Off to a great start :)
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Philco’s 48-700, had a brute force supply. DuMont had a set that was magnetically deflected and had brute force supply, too. I think they had a retrofit kit for it that they sent out to owners.

I think a few Sylvanias had RF power supplies for the HV, and also, DuMont, being DuMont, had a set that derived the HV from an RF style supply that synchronized to the horizontal…

Thanx much for the fascinating response to my post, the Philco is a very interesting set. Like to know more of the others.
Did Philco have a subsequent 7" electrostat model (50-702) with a troublesome oscillator EHT supply? It was Jim, an old friend that mentioned it to me. I mentioned adapting a salvaged Motorola electrostat EHT oscillator coil into it, but he wanted to solve the problem with the original, which at last commo, didn't happen.
https://www.antiqueradios.com/forums...c.php?t=112520

I was told Westinghosue and others didn't use a flyback to avoid paying royalties to RCA.

So...many...caps... These are just some of the 0.1uF bumblebees. Still many to go.

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Barely any signal is making it through the tuner, but I can feed a signal into the IF just fine.
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They was some input in the design from Philco. In Riders, there is one model badged Westinghouse, that is identical to the Philco 48-1001. :scratch2:

How could RCA claim a patent on prior art, their superheterodyne downconversion claim notwithstanding?