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 01-17-2015, 01:50 PM
Username1's Avatar
Username1 Username1 is offline
Not sure how I got here.
 
Join Date: Dec 2009
Location: Orange County NY
Posts: 3,649
Hi! Sorry this question is pretty frustrating.

Timmy, I have never seen a flyback from this tv, From the pictures Bill put up
I'm thinking it comes with the tube socket, and a few of the delicate wires off
the transformer are already attached to something so they don't break.....
If so, then you have easily identified tie points.... But since we all can't see
the tv at your place, we need to be sure all the connections are correct.

One way to check is to look at the resistance of each pin on the transformer
and make the assumption that as you add wire to the device, resistance will
increase. To check that you begin with your ohm meter at a known point, and
then work away from that point and see if you get what you expect...

If you look at this transformer, point A and point B are the closest points but
the winding is the largest, so putting your meter across A+B you will get a
starting resistance.

Write that down A+B= ?

Then take the ohm meter lead from point B and put it on point C This will
be a new total: It ill be A+B+C= Your meter will be on point A and C for this total.

Write that number down A+B+C=?

Now this is the tricky part, the bottom of the transformer is D But the largest
resistance reading looks like it should be between A and F. Now to me
I think Winding D and F are a separate winding.

It looks like both bottom coils are center tapped, so since the both coils lower
than the center tap should be very short, and parallel to point Resistance
between point D and E should be very small..

Write down resistance D to E =?

Also resistance between C and F should be almost twice the resistance of D to E

Write down resistance C to F =?

This is one way to find the bottom of the transformer. We're trying to confirm that point D
has been connected where it belongs.... I would be ok if you had the old transformer
and we could measure the points off it, without dis connecting these points
to make resistance readings...... But since you don't, you might want to
make these checks....

But before you go, I want you to know I am still concerned with the lack of HV on
the tube after you power down the set.... To that point Have you ever checked to
be sure that the correct heater windings go to the right tubes of the 4 tubes right
there..... It may be possible that something wired wrong there would be a bleed
off the HV when the set powers off..... And I have also been trying to still look for a
good reason why the 1 meg ohm resistor feeding the focus voltage burnt in half.....

Good luck with checking this stuff. You are very persistant with this set.....

.
Attached Images
File Type: jpg transformer-pins.jpg (35.4 KB, 13 views)
__________________
Yes you can call me "Squirrel boy"

Last edited by Username1; 01-17-2015 at 02:15 PM.
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.