Videokarma.org

Go Back   Videokarma.org TV - Video - Vintage Television & Radio Forums > Early Color Television

We appreciate your help

in keeping this site going.
Reply
 
Thread Tools Display Modes
  #1  
Old 01-28-2008, 11:51 AM
vintagecollect's Avatar
vintagecollect vintagecollect is offline
VideoKarma Member
 
Join Date: Jul 2005
Posts: 658
RCA TM-21B Color Monitor

anyone knowing of these were used in most early color tv stations?? The tube count is high, complicated set. Used very good color demodulaion and other advanced circuits? Henry kloss used one of these when he was designing the advent videobeam. It shows his lab setup with this monitor, screen size is adjusted to look like a rectangular picture, but screen is definate roundie and cabinet the same. Station indicator is projected in large white numbers w/ black background from square window above crt. Does anyone have one besides the museum?? Color reproduction must be excellent. For ultra accurate NTSC color?
__________________
1977 Zenith Chromacolor II
A Very Modern Zenith
Reply With Quote
  #2  
Old 01-28-2008, 12:29 PM
Steve McVoy's Avatar
Steve McVoy Steve McVoy is offline
VideoKarma Member
 
Join Date: Oct 2002
Location: Columbus, Ohio
Posts: 1,477
There are 5 surviving TM-21s that we know of, 4 with collectors and one at the Early Television Museum.
Reply With Quote
  #3  
Old 01-28-2008, 12:39 PM
vintagecollect's Avatar
vintagecollect vintagecollect is offline
VideoKarma Member
 
Join Date: Jul 2005
Posts: 658
Good to hear you chime in, That saba projection unit is coool. I wish more american sets were beautiful like that. Here's pic of kloss in lab while using monitor round screen
size shortened top and bottom probaly to mimic 4:3 for videobeam screen validating with henry kloss at the controls. Person working at advent said theses were for accurate NTSC referencing. Click on green arrows to see pic enlarged when popped up.
Attached Images
File Type: jpg kloss lab.jpg (92.2 KB, 176 views)
__________________
1977 Zenith Chromacolor II
A Very Modern Zenith
Reply With Quote
  #4  
Old 01-28-2008, 04:02 PM
old_tv_nut's Avatar
old_tv_nut old_tv_nut is offline
See yourself on Color TV!
 
Join Date: Jul 2004
Location: Rancho Sahuarita
Posts: 7,184
The number above the screen was a piece of plastic to indicate the source (camera number), as this was a studio monitor with baseband composite input (no tuner). The "underscan" operation shown in the picture was selectable with a switch to show the complete image without corner cutoff. Part of the complication of studio monitors was to maintain linearity and convergence when in both underscan and "normal" modes.
Reply With Quote
  #5  
Old 02-05-2008, 09:22 PM
julianburke julianburke is offline
VideoKarma Member
 
Join Date: May 2004
Location: Knoxville, Tennessee
Posts: 644
I have an RCA TM-21 monitor. I don't know if it is registered with the archives yet-thought I have done that. I may get it fired up when the weather breaks. I have a GE PE350 camera sitting on top of it. Geeze it weighs a ton along with everything else I have! Julian
__________________
julian
Reply With Quote
Audiokarma
  #6  
Old 02-05-2008, 09:26 PM
Steve McVoy's Avatar
Steve McVoy Steve McVoy is offline
VideoKarma Member
 
Join Date: Oct 2002
Location: Columbus, Ohio
Posts: 1,477
No, Julian, I didn't have your TM-21 in the database. I'll add it. Is it A, B, C, or D?
Reply With Quote
  #7  
Old 02-07-2008, 01:23 AM
John Folsom's Avatar
John Folsom John Folsom is offline
VideoKarma Member
 
Join Date: May 2004
Location: Melbourne Florida
Posts: 932
Julian, which cRT does you monitor have in it? 21AXP22, 21CYP22 or other?
__________________
John Folsom
Reply With Quote
  #8  
Old 03-18-2008, 05:17 PM
Tinman's Avatar
Tinman Tinman is offline
Reel to Reel Nut
 
Join Date: Aug 2007
Location: Los Angeles, California.
Posts: 10
You must be kidding?? I had one of those beasts when I went to high school.

Maybe I should have kept it. It's very possible that my monitor ended up in the hands of a collector. How interesting..... and it was CLEAN, too.

Well, you can't keep everything.
Reply With Quote
  #9  
Old 03-18-2008, 05:54 PM
julianburke julianburke is offline
VideoKarma Member
 
Join Date: May 2004
Location: Knoxville, Tennessee
Posts: 644
I'm thinking my TM 21 has a 21FJP22 in it. I also believe it was replaced in 1978 because of the warranty sticker on it. It is in my warehouse and will try to remember to look at it again and see which series it is and double check the numbers. It's a nice one and all complete with a beautiful front door.
__________________
julian
Reply With Quote
  #10  
Old 03-19-2008, 11:32 AM
kx250rider's Avatar
kx250rider kx250rider is offline
REAL TVs have TUBES!
 
Join Date: Oct 2005
Location: Los Angeles & Dallas
Posts: 3,239
There were 3 of those several years ago at Apex in Sun Valley... They were rusty and beat-up, but maybe I'll go see if they're still there. Next to them was a complete RCA film chain from the late 50s or early 60s.

Charles
__________________
Collecting & restoring TVs in Los Angeles since age 10
Reply With Quote
Audiokarma
  #11  
Old 03-19-2008, 06:29 PM
Dave A's Avatar
Dave A Dave A is offline
VideoKarma Member
 
Join Date: Aug 2003
Location: SE Pennsylvania
Posts: 1,529
Do I remember right that RCA only put the best of the best production CRT's in these? I wonder how they culled them.

Dave A
__________________
“Once you eliminate the impossible...whatever remains, no matter how improbable, must be the truth." Sherlock Holmes.
Reply With Quote
  #12  
Old 03-19-2008, 10:47 PM
Steve McVoy's Avatar
Steve McVoy Steve McVoy is offline
VideoKarma Member
 
Join Date: Oct 2002
Location: Columbus, Ohio
Posts: 1,477
There is a 21 inch color CRT in Dave Johnson's stuff that looks just like a 21AXP22. It is labeled 1819P22. I was told that it was a specially selected 21AXP22 for use in monitors. Does anyone know if this is true?
Reply With Quote
  #13  
Old 03-20-2008, 10:36 AM
old_tv_nut's Avatar
old_tv_nut old_tv_nut is offline
See yourself on Color TV!
 
Join Date: Jul 2004
Location: Rancho Sahuarita
Posts: 7,184
the setup chart for the B&K tester
http://bkprecision.com/download/docu...on/100-CRT.pdf
shows the same settings for both
Reply With Quote
  #14  
Old 03-20-2008, 10:45 AM
ChuckR ChuckR is offline
VideoKarma Member
 
Join Date: Oct 2004
Posts: 4
When I did transfers on the film chain at Compact Video in Burbank, CA in the early 70's, they used a roundie monitor. I asked and was told that it was a specially selected, optimal picture tube. The date would seem late for a 21AXP22, however, the practice would suggest that it would have been part of monitor manufacture.
Reply With Quote
  #15  
Old 03-20-2008, 11:54 AM
kx250rider's Avatar
kx250rider kx250rider is offline
REAL TVs have TUBES!
 
Join Date: Oct 2005
Location: Los Angeles & Dallas
Posts: 3,239
Later, there were hi-res (supposedly) versions of the 21FJP22... I have one in my Zenith, which if I recall, is a HR21GVP22. I've heard of a military number for 21" roundie tubes, which might be this 1819P22... I wonder if SgtRob might be able to ring in on this?

Charles
__________________
Collecting & restoring TVs in Los Angeles since age 10
Reply With Quote
Audiokarma
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 04:09 PM.



Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
©Copyright 2012 VideoKarma.org, All rights reserved.