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 12-07-2010, 06:17 PM
rca2000's Avatar
rca2000 rca2000 is offline
VideoKarma Member
 
Join Date: Mar 2003
Location: cincinnati,ohio
Posts: 2,096
Quote:
Originally Posted by Eric H View Post
If your 5 still has the metal cone 21AXP in it I'd be very concerned about any extreme temperatures, hot or cold.

I would think expansion and contraction would be bad for that tube.
Yes it DOES appear to have the original 21AX, since the safety glass is still in place, as is the plastic cover over the metal shell of the tube. The set is FAR from operational, and needs a full recap and such...., but is intact, knobs, back cover and all--and as I said--appears to have a good tube.


So, I should just unplug it--and "let it alone" I guess.
Reply With Quote
  #17  
Old 12-07-2010, 10:56 PM
Red Raster's Avatar
Red Raster Red Raster is offline
VideoKarma Member
 
Join Date: Aug 2010
Location: Prince George B.C. Canada
Posts: 176
Hot and cold mileage,cold to hot and hot to cold

Located 620 road miles north of Seatle and a fetish for the round screen,I go to far away places and in a wide variety of temperature changes along the way. From North Dakota to southern Mississippi you will find the temperatures can vary a little bit. So far no vaccum losses including a CTC 5 from Chicago and a zenith port hole w/12UP4 out of Connecticut My furthest pick up was around Bucksport Maine.
Reply With Quote
  #18  
Old 12-08-2010, 12:41 AM
andy's Avatar
andy andy is offline
VideoKarma Member
 
Join Date: Jul 2002
Location: Austin, TX
Posts: 3,933
I wouldn't worry too much about extreme temperatures, as long as there are no sudden changes. Keep in mind that what we call extreme is nothing compared to the temperatures the CRTs were exposed to when they were manufactured. All the glass to metal seals were made at very high temperatures, so I can't imagine another 70 degrees colder makes much difference.
Reply With Quote
  #19  
Old 12-08-2010, 07:09 AM
Reece's Avatar
Reece Reece is offline
VideoKarma Member
 
Join Date: Jul 2004
Location: Cleona, PA
Posts: 2,179
Agree that cold storage probably won't hurt, but if you're gonna warm it, why burn the tubes? Hang a 75 watt light bulb inside the cabinet and throw some drop cloths over the set. All warm and toasty like Aunt Agnes in bed with her heating pad.
__________________
Reece

Perfection is hard to reach with a screwdriver.
Reply With Quote
  #20  
Old 12-08-2010, 04:42 PM
John Folsom's Avatar
John Folsom John Folsom is offline
VideoKarma Member
 
Join Date: May 2004
Location: Melbourne Florida
Posts: 938
I think oldtvman has it right. Moisture is the biggest issue. All the CRTs went through at least 600 degrees F in the oven while they were processed, with a change from ambient to hot and back to ambient in only 3-4 hours. Much more extreme than any temperature delta they will see just sitting exposed to the heat and cold of ordinary weather. The expansion characteristics of the glass to metal joins were carefully engineered to expand and contract at the same rate. Otherwise, no CRT would ever survive being built in the first place.
__________________
John Folsom
Reply With Quote
Audiokarma
  #21  
Old 12-24-2010, 01:23 PM
oldtvman's Avatar
oldtvman oldtvman is offline
Larry Melton (oldtvman)
 
Join Date: Jan 2005
Location: Mishawaka, Indiana
Posts: 716
Will be bringing in the ctc 9 I got from Dean to start restoration next week. It's been setting out in the garage. I'll let it set for 24 hours.
__________________
[IMG]
Reply With Quote
  #22  
Old 02-25-2011, 10:05 PM
TV Charlie TV Charlie is offline
VideoKarma Member
 
Join Date: Jan 2011
Location: Warren MI-suburban Detroit
Posts: 4
Cold

The worst cataract cases I've run across were sets stored in garages, including mine. (Michigan temperature extremes)
Reply With Quote
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 10:27 AM.



Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
ęCopyright 2012 VideoKarma.org, All rights reserved.