Videokarma.org

Go Back   Videokarma.org TV - Video - Vintage Television & Radio Forums > VideoKarma Classifieds

We appreciate your help

in keeping this site going.
Reply
 
Thread Tools Display Modes
  #1  
Old 04-18-2010, 12:59 AM
Winky Dink's Avatar
Winky Dink Winky Dink is offline
VideoKarma Member
 
Join Date: Apr 2010
Location: Meridian, Idaho.
Posts: 461
Need a focus coil for Motorola 12T2 (TS-53 Chassis)

I've come to the end of my first restoration attempt unless I can replace a dead focus coil. There has to be one out there, somewhere.

So everybody please stop everything, quit your jobs, drop out of school, and help me find one!

My beloved Motorola is our family's first TV, a 1950 model 12T2. Other models with the same (TS-53) chassis are 12T1, 12T3, 12K1, 12KS, and 12K3.
The Motorola part number is 24B792581.

Thanks.
Reply With Quote
  #2  
Old 04-18-2010, 01:18 AM
bandersen's Avatar
bandersen bandersen is offline
Restoring Moto VT71s
 
Join Date: Mar 2009
Location: Chicago, IL
Posts: 7,229
I have a spare TS-60 chassis. I wonder if that focus coil would work ? Here's a picture.

__________________
Here are my Vintage Radio & TV YouTube Channel and Photo Gallery

Last edited by bandersen; 04-20-2010 at 06:50 PM.
Reply With Quote
  #3  
Old 04-19-2010, 11:10 PM
bgadow's Avatar
bgadow bgadow is offline
VideoKarma Member
 
Join Date: Oct 2003
Location: Federalsburg, MD
Posts: 5,397
The Thordarson catalog says that they never made a replacement, and that the TS-53 uses a different coil than the TS-60. I don't want to sound negative, though! I'm sure somebody has it out there-gotta be a parts chassis sitting around...
__________________
Bryan
Reply With Quote
  #4  
Old 04-20-2010, 12:05 AM
Eric H's Avatar
Eric H Eric H is offline
Administrator
 
Join Date: Jun 2002
Location: So. Calif
Posts: 11,277
I once took apart an RCA focus coil to paint it, it was very simple, just a big coil of wire.

If yours can be taken apart it could probably be rewound quite easily with a drill and a spool of the proper sized wire.
You may even get lucky and find a break in the windings close to the end.
Reply With Quote
  #5  
Old 04-20-2010, 03:20 AM
Winky Dink's Avatar
Winky Dink Winky Dink is offline
VideoKarma Member
 
Join Date: Apr 2010
Location: Meridian, Idaho.
Posts: 461
Thanks for the helpful information. I've already taken apart the coil's case, and I've fabricated a crude rig to unwind, possibly repair, possibly rewind. In any case, my first restoration is a can't-lose situation. If I end up with nonworking, nostalgic piece of furniture--well, that's what I intended when I first brought it home.
Reply With Quote
Audiokarma
  #6  
Old 04-20-2010, 06:51 PM
bandersen's Avatar
bandersen bandersen is offline
Restoring Moto VT71s
 
Join Date: Mar 2009
Location: Chicago, IL
Posts: 7,229
I update my pic above. Bryan was right - I have a 24B792169.
__________________
Here are my Vintage Radio & TV YouTube Channel and Photo Gallery
Reply With Quote
  #7  
Old 04-21-2010, 12:56 AM
Phil Nelson's Avatar
Phil Nelson Phil Nelson is offline
VideoKarma Member
 
Join Date: Jan 2006
Posts: 3,876
Rewinding is a good idea and I'd be curious to hear whether it works. When rewinding, I imagine you'd want to take it slowly and try not to cross strands more than necessary, which could result in a coil significantly larger than the original. Watching how the wire unreels should tell you how to lay it back in.

Think of it as a fun science project. If it works -- hey, free coil! If not, it was no good, anyway.

Phil
Reply With Quote
  #8  
Old 04-22-2010, 04:52 AM
Winky Dink's Avatar
Winky Dink Winky Dink is offline
VideoKarma Member
 
Join Date: Apr 2010
Location: Meridian, Idaho.
Posts: 461


That was my thinking, too--I've got nothing to lose. So I made a crude wind/unwind apparatus and went to work. I've unwound about 15% of the coil and I've found three breaks so far, and they're all on the same outer edge of the coil. There might be some green copper oxidation associated with the breaks. After repairing the second break there was continuity through the coil with appropriate resistance, but when I started to rewind, another broken end popped up. I'll see about joining the third break tomorrow.
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 03:04 AM.



Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
ęCopyright 2012 VideoKarma.org, All rights reserved.