Videokarma.org

Go Back   Videokarma.org TV - Video - Vintage Television & Radio Forums > Early B&W and Projection TV

Notices

We appreciate your help

in keeping this site going.
 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
  #4  
Old 12-06-2011, 09:29 PM
Gambr1nus Gambr1nus is offline
VideoKarma Member
 
Join Date: Dec 2011
Posts: 9
I pulled the chassis out of the cabinet and give it a once over with the air compressor. Man at the 50 years old dust I ate, I guess I should invest in some paper dust masks next time.

Well I did a quick inspection of the unit, I've got a few resistors cracking and showing oxidized leads. Also I saw some oxidation underneath both of the cap cans. I didn't notice anything funky looking where I saw the arc at, but I assume it was created by something down-line and not at the site of arcing. I inspected some of the tubes in anticipation of using a friend's hickok when I noticed one of the tubes are different than specified by the tube layout printed on the back of the tv and on the chassis. The tube is supposed to be a 12DQ6A, but instead is equipped by a 12CU6. I looked these up on rm and noticed a distinct voltage difference off pin 5.


This is the equipped tube showing 72.5 volts on pin 5


This is the required tube showing 22.5 volts on pin 5

I believe I am reading this right, they are not listed as compatible tubes so I assume this is the wrong tube.

I plan on ordering caps next week, and testing the specs on the resistors, specifically the suspect ones.
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 10:52 PM.



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