This should be fun (RCA TM-10 15GP22 monitor)

[Phil Nelson]

Thanks for the kind wishes. I promise to treat this thing right.

When I first heard about it, I contacted John Folsom, who advised that it's an interesting set and well worth getting.

The CRT is stamped 15GP22 (and PAR under that, whatever PAR means).

This will be a long term project, so don't expect exciting news any time soon. Today's big achievement was unbolting it from the pallet and grunting it onto a metal table where I can start to clean it up (photo below).

The previous owner also has a B/W monitor for sale, round CRT, model MI-36052. If anyone's interested, send me a PM and I'll get you his contact info.

Phil Nelson

[Sandy G]

Wowwwwwww...

[holmesuser01]

Originally Posted by Sandy G

Wowwwwwww...

My thoughts, exactly!

[Glenz75]

What a find and a half! You sure have landed a real rarity there by the sounds of it! Looking foward to the restoration story when you get to it.. Congrats!

[old_tv_nut]

Originally Posted by Phil Nelson

The CRT is stamped 15GP22 (and PAR under that, whatever PAR means).

Unless somebody knows what PAR means, we could guess - here's mine:
Production Acceptance Run (?)

[old_tv_nut]

Originally Posted by Komet

Very interesting set, what is that big circular plug near the RGB imput?

If you're talking about the big plug near the red, green and blue-colored rings, I don't know what the plug is, but those colored things look like test probe points.

[ChrisW6ATV]

The largest connector, beneath the black and white test points, is the power input, a three-terminal Hubbell twist-lock plug.

[N2IXK]

The large round plug appears to be a twistlock AC power connector...

[Steve McVoy]

We know of a total of 6 of these that have survived.

[Pete Deksnis]

Originally Posted by old_tv_nut

Unless somebody knows what PAR means, we could guess - here's mine:
Production Acceptance Run (?)

Interesting guess. Phil: is there a date code on the 15GP22? The earliest known by me is the fourth week of 1954. If this tube is earlier it could be quite a significant 15G.

Pete

[Phil Nelson]

All I can see is the CRT neck at this stage. Nothing else printed on the glass of the neck. On the base it says Made in U.S.A. 5-22.

I just noticed that someone wrote in pencil on the bottoms of two guns. One says 5/13, the other has an asterisk drawn on it.

Phil Nelson

[miniman82]

If that date code is correct, there are older 21AXP22's out there. The one in my 21-CT-55 has 4-52.

[Pete Deksnis]

Some 15G's have production id numbers etched inside, but I've never seen pencil before. No contamination issues apparently.

Yes, it's a 'new' 15G. Not many around with 1955 date codes. As was speculated before, this may be either selected or, considering the inside dates, custom built for a TM-10.

Pete

[Phil Nelson]

So, the date code is something like year-week (5-22 being 1955, 22nd week)?

It didn't occur to me that the penciled numbers would also be a date code.

If I get some time later, I can look inside for etched codes.

Phil Nelson

P.S. New is good for me, from a customer standpoint. The last thing I want to buy is the first example (of anything) off the assembly line

[kvflyer]

Originally Posted by Phil Nelson

So, the date code is something like year-week (5-22 being 1955, 22nd week)?

...

That would be my guess too...