Videokarma.org

Go Back   Videokarma.org TV - Video - Vintage Television & Radio Forums > Solid State CRT Televisions

We appreciate your help

in keeping this site going.
Reply
 
Thread Tools Display Modes
  #16  
Old 07-16-2018, 06:57 PM
WISCOJIM WISCOJIM is offline
VideoKarma Member
 
Join Date: Sep 2005
Location: Grand Chute, Wisconsin
Posts: 1,932
Quote:
Originally Posted by dewickt View Post
Magnavox/Philips 32" lasted over 100,000 hours on CRT, after 200,000 the second tube was OK but the chassis died (flyback), was not worth fixing since NAP had closed down and parts were not available. The replacement 48" flat screen in much better !!
I must be misunderstanding something here.

So you had 100,000 hours on the original CRT, and 200,000 on the replacement for 300,000+ total hours? 300000 divided by 24 hours in a day divided by 365 days in a year would come to more than 34 years if the set was never turned off. They didn't make 32-inch TVs back in 1984, did they?

What year was your TV built, and how many hours a day was it used?

.
Reply With Quote
  #17  
Old 07-17-2018, 08:27 AM
kf4rca kf4rca is offline
VideoKarma Member
 
Join Date: Feb 2015
Posts: 238
When I was at the TV station...

We got between 4 and 5 years out of a tube. And that was in 24/7 operation. Since there are 8760 hours in a year, I figure that about 35,000 hours or so.
__________________
Reply With Quote
  #18  
Old 07-17-2018, 09:30 AM
zeno zeno is offline
VideoKarma Member
 
Join Date: Mar 2013
Location: New Hampshire
Posts: 3,109
Sounds like the Zenith jug got changed. Zenith always used Zenith
tubes ( EIA 343 ) or Rauland tubes (EIA 1101). Zenith owned Rauland
since the early 50's. IIRC the only exception was the first 14" color
that used an RCA ( EIA 274 ). In later years B&W tubes were mostly
Clintons. Small colors ( 9") also used an outside tube.

The NAP sounds like an RCA tube ( EIA 274). If its a NAP / Sylvania
EIA is 312.

TV life is based on the CRT. It was said a good set & jug should go
8 yrs. Average life must have gone to 20 yrs from the mid 70's
on with RCA , Zenith and some Sylvania tubes.

Last thing is the "bad" early 90's Zenith tubes. Zenith did extend the
normal 2 yr warranty on them. Up to 5 yrs on high end sets. The
tube would be free or at reduced price depending on age & price
of the set new. The dealer was also asked to pitch in with reduced labor.
No big deal, by then a CRT could be changed & set up in 15 mn.
The ones that got screwed were Sears customers. They bought most
electronics & self insured them. If your jug went in 2 yrs & 1 day
you got NOTHING from Sears or Zenith.

73 Zeno
LFOD !
Reply With Quote
  #19  
Old 07-17-2018, 10:59 AM
Electronic M's Avatar
Electronic M Electronic M is offline
M is for Memory
 
Join Date: Jan 2011
Location: Pewaukee/Delafield Wi
Posts: 9,806
Quote:
Originally Posted by zeno View Post
Sounds like the Zenith jug got changed. Zenith always used Zenith
tubes ( EIA 343 ) or Rauland tubes (EIA 1101). Zenith owned Rauland
since the early 50's. IIRC the only exception was the first 14" color
that used an RCA ( EIA 274 ). In later years B&W tubes were mostly
Clintons. Small colors ( 9") also used an outside tube.

73 Zeno
LFOD !
Additional exception: Zenith's first consumer color TVs had IIRC RCA 21FJP22 CRTs in them...I've got one or two CRTs with the Zenith sticker but a non-Zenith/rauland EIA.
__________________
Tom C.

What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4

Reading between the scan lines since the mid 2000's.
Reply With Quote
  #20  
Old 07-17-2018, 05:44 PM
mbates14 mbates14 is offline
VideoKarma Member
 
Join Date: Apr 2004
Posts: 941
I know it was changed. I said in my post I replaced it with an Admiral I obtained. I just dont know what EIN it is.

Edit: Nope. I failed to mention that until a few posts down. Whoops.

Last edited by mbates14; 07-17-2018 at 06:44 PM.
Reply With Quote
Audiokarma
  #21  
Old 07-17-2018, 05:47 PM
mbates14 mbates14 is offline
VideoKarma Member
 
Join Date: Apr 2004
Posts: 941
Quote:
Originally Posted by kf4rca View Post
We got between 4 and 5 years out of a tube. And that was in 24/7 operation. Since there are 8760 hours in a year, I figure that about 35,000 hours or so.
Nice. So I have basically doubled that on the CRT thats in my "nightly watcher"

It's good to have a baseline. I know that projection CRTs last far less time, I have had to retube an RPTV once.

Edit: My grandmother had one of the last RCA floor models, CTC203 I think it was. it never had any electrical faults, but back in 2013 or so the CRT got weak, as the picture is fuzzy with bad color bleed especially on reds and greens, the sun looks like its got flames on the right side.

Last edited by mbates14; 07-17-2018 at 06:34 PM.
Reply With Quote
  #22  
Old 07-18-2018, 08:13 AM
kf4rca kf4rca is offline
VideoKarma Member
 
Join Date: Feb 2015
Posts: 238
How about those 16x9 color HD CRT's? I've got three of those sets.
Seems to me they might not last as long as a 3x4 regular CRT.
__________________
Reply With Quote
  #23  
Old 07-18-2018, 09:16 AM
Jon A.'s Avatar
Jon A. Jon A. is offline
Don't mess with Esther.
 
Join Date: Jun 2013
Location: Canada
Posts: 4,133
Quote:
Originally Posted by KentTeffeteller View Post
Also, consider some TV chassis designs drive a CRT very hard in the name of brightness and picture quality, Sylvania SuperSets being a major offender.
Considering that and the worst cabinet build quality I've ever seen, Mexican chassis assembly and an unobtanium 35 meg focus control, I eventually wrote mine off as a hopeless pile of junk. The only thing I liked about it is that it was a remote set with a motorized varactor tuner; fortunately I have plans for that and the attached remote system chassis.
Reply With Quote
  #24  
Old 07-18-2018, 08:08 PM
ESigma25 ESigma25 is offline
VideoKarma Member
 
Join Date: Apr 2018
Posts: 29
My oldest sets (1982 and 1986) seem to be just fine, and I used the 1986 set all the time as a kid (the 1982 set wasn't originally mine). I wouldn't be surprised if they eventually had cap issues though.
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 01:12 PM.



Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
ęCopyright 2012 VideoKarma.org, All rights reserved.