Videokarma.org

Go Back   Videokarma.org TV - Video - Vintage Television & Radio Forums > Rectangular Screen Tube Televisions

We appreciate your help

in keeping this site going.
Reply
 
Thread Tools Display Modes
  #16  
Old 05-19-2018, 08:31 PM
dieseljeep dieseljeep is offline
VideoKarma Member
 
Join Date: Jul 2010
Posts: 7,562
Quote:
Originally Posted by maxhifi View Post
Looks really nice, I look forward to seeing how it works!
It looks like the 25L6 went to air!
That tube furnishes the lower voltage to many of the signal circuits. If it is bad, you'll have to replace it before going any further.
Reply With Quote
  #17  
Old 05-22-2018, 01:07 PM
LADR's Avatar
LADR LADR is offline
Местное и дх радио
 
Join Date: Mar 2017
Location: Birmingham, AL
Posts: 189
Why in the world did Motorola put the tuner tubes under the chassis?? Seems stupid to me.
__________________
Your good times will bring me down
Reply With Quote
  #18  
Old 05-22-2018, 02:58 PM
Electronic M's Avatar
Electronic M Electronic M is offline
M is for Memory
 
Join Date: Jan 2011
Location: Pewaukee/Delafield Wi
Posts: 14,758
Quote:
Originally Posted by LADR View Post
Why in the world did Motorola put the tuner tubes under the chassis?? Seems stupid to me.
Some Motos keep the fly and 1B3 under chassis with an access door. Dumont used to put 6AL5 detector tubes and 6X4 rects under chassis in some of their RA-103 sets...There are probably more bad examples in the TV field but at least they were socketed...In the tube hearing aid era, the subminiature types they used (pencil diameterX1.5" long) were often soldered directly into the chassis.

^Yet another attack from boring-trivia-man, AKA me.
__________________
Tom C.

Zenith: The quality stays in EVEN after the name falls off!
What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4
Reply With Quote
  #19  
Old 05-22-2018, 07:23 PM
LADR's Avatar
LADR LADR is offline
Местное и дх радио
 
Join Date: Mar 2017
Location: Birmingham, AL
Posts: 189
Quote:
Originally Posted by dieseljeep View Post
It looks like the 25L6 went to air!
That tube furnishes the lower voltage to many of the signal circuits. If it is bad, you'll have to replace it before going any further.
It didn’t, it was just dirty. Don’t know what the white stuff is.
__________________
Your good times will bring me down
Reply With Quote
  #20  
Old 05-23-2018, 07:16 PM
LADR's Avatar
LADR LADR is offline
Местное и дх радио
 
Join Date: Mar 2017
Location: Birmingham, AL
Posts: 189
I’m starting to paint the cabinet and i think its turning out nice!
Attached Images
File Type: jpg 1A7ADA7A-B3F5-4527-B04D-C87DB184E3AB.jpg (44.2 KB, 26 views)
__________________
Your good times will bring me down
Reply With Quote
Audiokarma
  #21  
Old 05-27-2018, 11:12 AM
dieseljeep dieseljeep is offline
VideoKarma Member
 
Join Date: Jul 2010
Posts: 7,562
Quote:
Originally Posted by Electronic M View Post
Some Motos keep the fly and 1B3 under chassis with an access door. Dumont used to put 6AL5 detector tubes and 6X4 rects under chassis in some of their RA-103 sets...There are probably more bad examples in the TV field but at least they were socketed...In the tube hearing aid era, the subminiature types they used (pencil diameterX1.5" long) were often soldered directly into the chassis.

^Yet another attack from boring-trivia-man, AKA me.
That was the last Motorola that the chassis had to be removed to replace the tuner and high voltage rectifier. The slightly newer larger screen sets had the tuner on the right side with the tubes on top of the chassis. The HV rectifier had the trap door. UHF equipped sets had the 6AF4 under the chassis, but there was an access cover on the bottom.
Then there was the Sylvanias that had the solder-in 5642 HV rectifiers. IIRC, the tube location chart didn't even list them.
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 05:24 AM.



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