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

[Phil Nelson]

Got this interesting item yesterday:







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.



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.



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

[jr_tech]

Oh my, what a find!

Love the looks of the getter flashes!

jr

[Ralph S]

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!

[hi_volt]

Me likey!!

[Steve D.]

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.

[Sandy G]

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

[Phil Nelson]

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

[Eric H]

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?

[mstaton]

Wow that is blanking cool!

[N2IXK]

Originally Posted by Eric H

What exactly is a "Tally" socket used for?

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.

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.

[Steve D.]

Originally Posted by Eric H

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?

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.

[miniman82]

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

[Phil Nelson]

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

Phil Nelson

[miniman82]

Lucky ()*&#@
lol

[Phil Nelson]

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