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

Got this interesting item yesterday:

http://antiqueradio.org/art/RCATM-10FrontPanel.jpg

http://antiqueradio.org/art/RCATM-10Rear.jpg

http://antiqueradio.org/art/RCATM-10...umberPlate.jpg

It's a color studio monitor using a 15GP22 CRT. Its ID plate says MI-40206-A, but the ETF website says it's a model TM-10, so that's what I'll call it.

I was nervous about shipping this beast halfway across North America. It arrived in an 18-wheeler; the driver parked in the street and trundled it down our driveway with a pallet jack. I hovered beside him like a mosquito, grinning and waving my hands and babbling about how this RARE item has a G-L-A-S-S picture tube inside, and I had been a little worried about shipping it 2600 miles, blah blah blah. He probably couldn't wait to get away from the blabby kook.

Good news: The CRT is under vacuum and it tests strong on all three guns (Yay!). The rest looks unmolested and intact, apart from missing an HV cage cover.

It takes an ordinary video input, as you can see from the rear panel, so I should be able to make a picture with it, once restored.

http://antiqueradio.org/art/RCATM-10RearPanel.jpg

It's still bolted to a pallet in my garage, but this under-chassis photo from the previous owner shows an orderly, fairly spacious layout.

http://antiqueradio.org/art/RCATM-10...reliminary.jpg

It may be months before I can mess with this. I already have a winter's worth of projects underway or waiting in the queue. Fun to think about in the meantime, though.

Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html

Oh my, what a find! :banana::banana::banana:

Love the looks of the getter flashes!

jr

Phil, that's a spectacular find. You're to be congratulated. I remember these monitors when they were new, right along with the TK-40 and 41 cameras that went with them. Good for you!

Me likey!! :yes: :yes:

Nice find Phil. I recall they were an RCA TM-10A model. Great it has a good CRT.

http://nrcdxas.org/articles/tm10a/

When I worked at KTLA-TV in the 70's, they finally cleaned out the tech equipment storage locker. 2 of these TM-10A's were up for grabs. All you had to do is stick your name on it and it was yours. I missed grabbing the unclaimed one by 10 seconds. Both of these had the full the metal cabinet on them. They were low use and out of service for probably 20 years. A few years later I did score a working CT-100 from the KTLA chief engineer's home for $100.

-Steve D.

Did I mention that Ah HATE Yew ?!? (grin) Seriously, EXCELLENT score !! Wonder how many of these Bad Boiz are still around ?

Thanks, Steve, for the pointer to that article. I suppose a schematic is too much to hope for, but any scraps of technical information about this monitor will be helpful.

Regards,

Phil Nelson

Great find, but I'm sure that will have zero WAF (Wife acceptance factor) at least in the living quarters.

What exactly is a "Tally" socket used for?

Wow that is blanking cool!

The tally socket connects to the indicator lamps above the screen (lens is missing in the picture). The tally lights on different monitors/cameras were remotely controlled by the switcher in master control, to show which camera signal was being aired at any given time.

I knew a guy who bought the 21" version of this monitor (the TM-21) at a hamfest back in the '80s, but he stupidly gutted it for the transformers and other parts.:yikes:

The 21" version was HUGE, about the size of a washing machine, but heavier. All hinge-out modular chassis, fully regulated power supplies with a whole buttload of 6080 tubes. Used a 21AXP22, IIRC.

I believe the "tally" socket on this color monitor is much like the "tally" light on a broadcast camera that tells the performer which camera is on air. A red light is attached to the socket and when a camera is switched to line or is providing the on-air picture the tally light on that monitor lights up indicating to the director and others in the control room which monitor has the line or on-air picture being fed to it from the camera.
The tally light would switch on from monitor to monitor as the various cameras feeding a picture are "punched up" by the technical director or director. I hope this is clear.

-Steve D.

Dammit, did you get this from ufarad? He told me he wouldn't sell it!

Don't know a ufarad. A guy just emailed me out of the blue.

Phil Nelson

Lucky ()*&#@
lol

He probably got wind of that rotten B/W Philco I rescued from the E-waste recycler and thought, "Man, I bet I can sell that guy anything!"

:)

Phil Nelson

I was going to post "How did you FIND this?". Congratulations on receiving and saving a rare piece of TV history, probably the second most significant find since the RCA prototype from Harry Poster.

Phil, you are going to have to update the name of your site to Phil's Old Radios & Televisions. :D

how satisfying would it be to sit and watch a movie or a dvd of a television show from the early colors days on this!i love this and it is in good hands now.

Sugoi!

I'd start playing the lottery if I were Phil......

"Its ID plate says MI-40206-A, but the ETF website says it's a model TM-10, so that's what I'll call it."

RCA professional gear often had a type number (TM-10 in this case) and always an MI number that appeared in the catalog book/price sheet for ordering. Even the crossover networks used for the public address/music speakers at the 1964-65 New York World's Fair were specified by MI-number, which allowed me to track them down to determine the circuit used.

Phil, nice to see you got it, unlike the sarcastic harpoons above! Just kidding and seriously, glad that you got this monitor and especially glad that the kinescope is good. How many can there be out there?

Yeah, despite all the frivolous noise I make when something like this is scored, I can't think of it going to a better home than Phil...Or any of several more of you guys here that have the technical smarts to truly do it justice...I most certainly DON'T.

Great Score!
 

Great score Phil! Look at all the lytics in that thing; certainly an impressive find. Please post pictures for us to follow on its progress! I look forward to seeing some stills of the picture it produces once you’ve got it dialed in. Bill

My very first TV station job had one of these monitors in prop storage. I could see it, I just couldn't get it out of there, or I would have owned it. Too much stuff between it and the doorway. I did wind up with a TP-6 RCA projector, though.

Congratulations on this find. These things are really scarce now, eh?

A nice overview of this monitor (and lots of early RCA color broadcast gear) available in a 1954 issue of RCA "Broadcast News" here:

http://www.americanradiohistory.com/...77-01-1954.pdf

The site has many other issues available for download, as well....

Great reading from this. Thanks.

Alot of the broadcast equipment I got to see was from this era. Unfortunately, its all gone now. Hmmph. It only sat there in storage for 35+ years!

I hereby nominate you for the most significant historical find of the decade :banana: !!!

And as others said, I don't see any chalky crap in the tube, so maybe you got a military-spec version with a good seal!

Charles

The tubes that went into studio monitors were likely hand-selected from the best production tubes available. Is the tube in this monitor labeled as a standard 15GP22 or does it have a special number?

Ahem...

http://videokarma.org/showthread.php?t=251369

Just sayin'. :smoke:

http://users.inetware.com/androniq/t.../smile/asd.gif

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

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

http://antiqueradio.org/art/RCATM-10CleaningTable.jpg

Wowwwwwww...

My thoughts, exactly!

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..:yes: Congrats!:thmbsp:

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

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.

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

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

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

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