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 05-18-2011, 10:18 PM
DaveWM DaveWM is offline
VideoKarma Member
 
Join Date: Feb 2009
Location: Orlando FL
Posts: 5,607
pluging into the full power (no variac dropping the voltage) resulted in a nice full rastor.

I either get No color or color bars rolling thru (no sync). It has a very soft horz lock, you can flop it both ways with the horz control so I presume the osc is working and when carefully adj it will hold but the phase is not solid (scene floats across the screen), so I presume there is a prob in the AFC on the horz, prob diodes or drifted resistors in the horz afc. I will just go a head and replace them rather than fooling around with it. My guess is the lack of solid horz lock is messing up the burst amp keying pulse from the flyback, and maybe a weak 3.58mhz crystal on top of that. I do get momentary color lock but its very fleeting. I have checked the tubes in the video/chroma, replaced one very weak 6GH8 (osc) and found a tube shield for it (was missing and not loose, darn tech...) and replace a 6WE6 that had a short that would show up after it heated up.

Tested the radio, all seemed good but for normal dirty speaker switches, but I will do a full recap of that later. I know there are a bunch of 5uf lytics in it that tend to dry up. I also will do the stereo mod to the TV selector so I can use the amp and drive it with the audio out from the DVD (will make an adapter that will allow reverting back the the interal TV audio buy just pluging it back in, did this before on the B&W maggie).
Reply With Quote
 



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 12:16 PM.



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