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
  #16  
Old 06-15-2011, 04:30 PM
ceebee23's Avatar
ceebee23 ceebee23 is offline
VideoKarma Member
 
Join Date: May 2004
Location: Melbourne, Australia
Posts: 356
WOW .. this is going to be the most amazing thread... this is real history .... I sure hope you can get the set to come alive... this really is what all this is about. Good luck and congratulations!
__________________
____________________________
........RGBRGBRGB ...colour my world
Reply With Quote
  #17  
Old 06-15-2011, 04:54 PM
Steve McVoy's Avatar
Steve McVoy Steve McVoy is offline
VideoKarma Member
 
Join Date: Oct 2002
Location: Columbus, Ohio
Posts: 1,477
Congratulations on getting to delivered. It should be an exciting project.

The space marked Delay doesn't look like it is in the video section?
Reply With Quote
  #18  
Old 06-15-2011, 05:00 PM
Steve D.'s Avatar
Steve D. Steve D. is offline
VideoKarma Member
 
Join Date: Sep 2002
Location: Hollywood Hills, Ca.
Posts: 1,790
Nick,

Great photos. Glad everything arrived in good order. My money is still on this being an RCA prototype. Look forward to what ever you guys discover.

-Steve D.
__________________
Please visit my CT-100, CTC-5, vintage color tv site:
http://www.wtv-zone.com/Stevetek/
Reply With Quote
  #19  
Old 06-15-2011, 05:56 PM
ohohyodafarted's Avatar
ohohyodafarted ohohyodafarted is offline
Bob Galanter
 
Join Date: Sep 2005
Location: Whitefish Bay, Wi (Milwaukee)
Posts: 1,053
Glad it all got there in good shape Nick. Especially that rare proto CRT. Hard to tell what the getter looks like from the photo, but you could check for continuity on the filiments before I get there on Saturday.

I will bring the Sencor and the B&K along with the adapter for the 20Pin bi-decal base.

From the photo I can tell the gun assembly is definately of the 15GP22 type with electrostatic convergence cup. It has some centering wings that are spot welded to the cup that are not present on a 15G gun but other than that, the gun is a 15G gun.

In the event the crt is a leaker, You could send it to France to be leak sealed with frit glass and re-gunned. John and I will be sending our first 4 15G tubes over there sometime in august. We have special cartons and a crate being built. Each round trip shipment to France and back will contain 4 tubes.
__________________
Vacuum tubes are used in Wisconsin to help heat your house.

New Web Site under developement
ME http://AntiqueTvGuy.com
Reply With Quote
  #20  
Old 06-15-2011, 05:58 PM
ggregg's Avatar
ggregg ggregg is offline
VideoKarma Member
 
Join Date: Oct 2010
Location: Minnesota
Posts: 702
Good for you Nick. Will enjoy watching your progress. That is quite the set.
Greg
Reply With Quote
Audiokarma
  #21  
Old 06-15-2011, 06:34 PM
ChrisW6ATV's Avatar
ChrisW6ATV ChrisW6ATV is offline
Another CT-100 lives!
 
Join Date: Feb 2007
Location: Hayward, Cal. USA
Posts: 3,464
Congratulations for your acquiring this unique set, Nick. I notice the convergence pin on the CRT socket looks like new, so it must not have had much use, though the 1958 1B3 is interesting.

Quote:
Originally Posted by ohohyodafarted View Post
John and I will be sending our first 4 15G tubes over there sometime in august. We have special cartons and a crate being built. Each round trip shipment to France and back will contain 4 tubes.
Bob-

I am happy to hear that the RACS 15GP22 rebuild project is moving beyond the one-off stage and into true production.
__________________
Chris

Quote from another forum: "(Antique TV collecting) always seemed to me to be a fringe hobby that only weirdos did."
Reply With Quote
  #22  
Old 06-15-2011, 06:52 PM
Steve McVoy's Avatar
Steve McVoy Steve McVoy is offline
VideoKarma Member
 
Join Date: Oct 2002
Location: Columbus, Ohio
Posts: 1,477
One of the things that Harry Poster told me was that he suspected that the previous owner (not a TV person) had plugged tubes in sockets just to sell the set.
Reply With Quote
  #23  
Old 06-15-2011, 07:00 PM
Steve McVoy's Avatar
Steve McVoy Steve McVoy is offline
VideoKarma Member
 
Join Date: Oct 2002
Location: Columbus, Ohio
Posts: 1,477
Bob, one of the photos from Harry showed the filaments glowing, so the filament has continuity and the tube isn't fully air.
Reply With Quote
  #24  
Old 06-15-2011, 07:12 PM
Mal Fuller Mal Fuller is offline
VideoKarma Member
 
Join Date: Jun 2011
Posts: 110
The chassis seems to show signs of a normal life and maintenance period during your set's first years in some kind of service. Sprague and Mallory single-section electrolytics and the 1B3 date coded 1958, all suggest a period of "normal" use.
Having no apparent delay line along with a chassis area earmarked "delay" is another unsolved mystery.
I gather reading twixt the lines that this set recently came from Harry Poster. He sure has had some rare merchandise through the years.
Reply With Quote
  #25  
Old 06-15-2011, 08:00 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 adventure begins! Have you determined at all if this could be a dot-sequential prototype rather than early NTSC?
Reply With Quote
Audiokarma
  #26  
Old 06-15-2011, 08:05 PM
MelodyMaster's Avatar
MelodyMaster MelodyMaster is offline
78s Galore.
 
Join Date: Apr 2009
Location: Mississauga, Ont, Canada
Posts: 86
Quote:
Originally Posted by Mal Fuller View Post
The chassis seems to show signs of a normal life and maintenance period during your set's first years in some kind of service. Sprague and Mallory single-section electrolytics and the 1B3 date coded 1958, all suggest a period of "normal" use.
Having no apparent delay line along with a chassis area earmarked "delay" is another unsolved mystery.
I gather reading twixt the lines that this set recently came from Harry Poster. He sure has had some rare merchandise through the years.
You know, a luminance delay line can also be a network of peaking coils and resistors in a can, or a long thin shielded wire wrapped around a non-inductive core with an active frequency compensation circuit. Until cheap glass delay lines were developed there were several methods of delaying a broadband signal. - Of course the delay might have been removed.. I gather this set does not use IQ demodulation otherwise it would need TWO delays.
Reply With Quote
  #27  
Old 06-15-2011, 08:12 PM
Sandy G's Avatar
Sandy G Sandy G is offline
Spiteful Old Cuss
 
Join Date: May 2003
Location: Rogersville, Tennessee
Posts: 9,571
This is kinda like findin' Gottlieb Daimler's heretofore unknown SECOND prototype of his 1886 car under a tarp in a dry barn somewhere...
__________________
Benevolent Despot
Reply With Quote
  #28  
Old 06-15-2011, 08:53 PM
miniman82's Avatar
miniman82 miniman82 is offline
First Light: 1952-2011
 
Join Date: Jun 2009
Location: Great Mills, MD
Posts: 4,159
Quote:
Originally Posted by ChrisW6ATV View Post
I notice the convergence pin on the CRT socket looks like new, so it must not have had much use.
I think you might be right....




Took a little time to wake up, but all 3 guns read at the top of the good scale after sitting for 5 minutes and the life test ain't bad either. Anyone wanna hear how the variac powerup of the chassis went?
Attached Images
File Type: jpg IMGP4550A.jpg (61.3 KB, 259 views)
__________________
Evolution...
Reply With Quote
  #29  
Old 06-15-2011, 08:59 PM
Pete Deksnis's Avatar
Pete Deksnis Pete Deksnis is offline
15GP22 demo @ ETF 2007
 
Join Date: Jan 2005
Location: Big Rapids, MI
Posts: 761
Quote:
Originally Posted by miniman82 View Post
Anyone wanna hear how the variac powerup of the chassis went?
You guys are getting all the fun! Don't keep us in suspense...
Reply With Quote
  #30  
Old 06-15-2011, 09:04 PM
Eric H's Avatar
Eric H Eric H is offline
Administrator
 
Join Date: Jun 2002
Location: So. Calif
Posts: 11,565
Quote:
Originally Posted by miniman82 View Post
I think you might be right....




Took a little time to wake up, but all 3 guns read at the top of the good scale after sitting for 5 minutes and the life test ain't bad either. Anyone wanna hear how the variac powerup of the chassis went?
You're got to be kidding, this tube tested good!!
Can it be plugged into a working CT-100 chassis to see if it works.
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 11:58 AM.



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