Videokarma.org

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

Notices

We appreciate your help

in keeping this site going.
 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
  #11  
Old 02-23-2011, 11:44 AM
DaveWM DaveWM is offline
VideoKarma Member
 
Join Date: Feb 2009
Location: Orlando FL
Posts: 5,607
what odd is I dont really know why I had the orig high current, the only thing I did was to replace the HOT coupling cap (the .01 tested a bit weak on my cap tester but not much just a little, certainly not enough to resolve this)

I think what was going on was the HV filament lead was shorting to the chassis, when I pulled it out an bench tested iit I could see/hear the arc.

after dressing it away from the chassis (short term fix) the arc resolved and the HOT current came down. I assume this was the base problem with the cathode current.

focus on that 1st pic was not very good. I plan to check the focus tube (1v2) and will check the focus voltage at the CRT.
and need to check the contrast control to see if its effective, maybe a weak Y signal (has all the orig eletrolytics, so I was thinking maybe the 12BY7 cathode bypass cap). I have seen low Y result in loss of detail.

finally I have to figure as bad as the cateract is, that has got to be hurting the pic some.
Reply With Quote
 


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 04:36 AM.



Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2026, Jelsoft Enterprises Ltd.
©Copyright 2012 VideoKarma.org, All rights reserved.