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Old 06-15-2011, 02:41 PM
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miniman82 miniman82 is offline
First Light: 1952-2011
Join Date: Jun 2009
Location: Great Mills, MD
Posts: 4,118
Originally Posted by John Folsom View Post
Nick, first, thanks for all the great hi-res photos. I am not sure when the 6AU4 was introduced, but this set may perdate its introduction. I have production 15" color sets with 1B3s in them, so it is not unheard of. Probably hard on the poor 1B3s, but they work.

You're welcome, John! At some point I should probably stitch them together to make one giant one, though it would take a long time to download. I don't know when the 6AU4 came out either, but I know we had previously speculated on the horizontal output tube- the 6CD6 in this chassis is dated the 17th week of 1951! Most of the rest of them date from '50/'52, with the 1B3 in the HV section showing 1958.

You are probably planning to do this, but I suggest you make a tube chart, listing tupe type/mfg/date code. Also, a list of part numbers on all transformers, as these often contain date codes and manufacturer info.

Yes, it's one of the things on my list. A lot of the parts on this chassis show RCA stamps, so I'm fairly certain this was made by them. Vert output transformer, power supply choke, some of the other RF cans, and of course the tuner are all RCA items along with some of the tubes (assuming those are the tubes it's supposed to have).

It is anybody's guess if the CRT is still under adequate vacuum to operate, but the signs are encouraging. Of course, my Hawkeye rebuilt 15GP22 tests good, had beautiful getters, and lights up purple like a neon tube when voltages are applied! So you just can't tell by looking.

Of course, you are correct. I hope the test this weekend brings good news. I can look through the center of the base, and am able to see a slight patch of green around the evacuation stem which indicates copper corrosion. I hope it has not done any harm.

Do you have the missing tubes, or are these going to be part of the mystery? I don't see tube numbers marked anywhere.
It's currently missing 2 tubes, no idea what they are or what they do. Part of the mystery! Perhaps Ed Reitan can shed some light on it?

Are any of the control labels readable? I can't tell from the photos.
Yep! The labels are faded, but I can still see what they say. Written in pencil on the front of the chassis going left to right are:

horizontal/vertical hold, power switch/volume, contrast/brightness, and tuner.

On the back:

Pretty much the same stuff as a CT-100 would have. Purity, convergence, drives, backgrounds, focus, ect. Nothing that would make me say "a-ha!", but I don't know much else about the set at this point anyway.
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