Videokarma.org

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

We appreciate your help

in keeping this site going.
Reply
 
Thread Tools Display Modes
  #16  
Old 01-26-2018, 11:21 AM
bandersen's Avatar
bandersen bandersen is offline
RCA 741PCS
 
Join Date: Mar 2009
Location: Chicago, IL
Posts: 8,085
I did a little more work before installing a new 16GP4. The old candohm was replaced with an aluminum housed chassis mount power resistor. A beefy Panasonic high-ripple current 105C electrolytic main filter cap replaced the Nichicon I had tacked in earlier.



I then installed a vertical retrace suppression circuit as described in Rider TV Manufacturers' Receiver Trouble Cures - Volume 1



Next I popped open the focus rheostat and bridged a break in the resistance wire. It's working very well now


It sure looks strange with that dinky 5" CRT installed.


A strong, rebuilt 16GP4 will take it's place.


Ah, that's better Time for some tweaks with a test pattern generator before installing back in the cabinet.
__________________
Here are my Vintage Radio & TV YouTube Channel and Photo Gallery
Reply With Quote
  #17  
Old 01-26-2018, 01:46 PM
jr_tech's Avatar
jr_tech jr_tech is offline
VideoKarma Member
 
Join Date: Sep 2009
Posts: 4,510
Looking good!

Did you paint the metal cone of the CRT red, or did it come that way? Nice to have a little "reminder" on those that are not enclosed with an insulated cover.

jr
Reply With Quote
  #18  
Old 01-26-2018, 03:00 PM
bandersen's Avatar
bandersen bandersen is offline
RCA 741PCS
 
Join Date: Mar 2009
Location: Chicago, IL
Posts: 8,085
That's how I found it in the set I salvaged it from. I've been told that indicates it's a rebuild rather than being a warning.

There's a visible neck weld and has a rebuilder's label on the cone. I think it makes a great warning and they all should have been red from the factory.
__________________
Here are my Vintage Radio & TV YouTube Channel and Photo Gallery
Reply With Quote
  #19  
Old 01-28-2018, 01:22 AM
EdKozk2 EdKozk2 is offline
Tinker
 
Join Date: Mar 2014
Location: Elkhorn, WI
Posts: 542
Hi Bob,
Picture looks good on that rebuilt crt.
I recently finished a RCA KCS-47 set with a 16GP4 that's dimmer than your old 16GP4. Hope you hold on to the old one, you never know when you might need it.
Reply With Quote
  #20  
Old 01-29-2018, 09:10 AM
bandersen's Avatar
bandersen bandersen is offline
RCA 741PCS
 
Join Date: Mar 2009
Location: Chicago, IL
Posts: 8,085
Yes, I have it. I hang on to all my weak CRTs. Better than nothing and maybe can be rebuilt someday. Got plenty of room with the new house.
__________________
Here are my Vintage Radio & TV YouTube Channel and Photo Gallery
Reply With Quote
Audiokarma
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 01:38 PM.



Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
©Copyright 2012 VideoKarma.org, All rights reserved.