Videokarma.org

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

Notices

We appreciate your help

in keeping this site going.
Reply
 
Thread Tools Display Modes
  #1  
Old 08-14-2008, 09:02 PM
theblackknight's Avatar
theblackknight theblackknight is offline
<--- BMW 635CSi
 
Join Date: Oct 2006
Location: St. Louis, MO
Posts: 33
sean, it was great to meet ya the other night. thanks for helpin me with the radio, i appreciate it.
Reply With Quote
  #2  
Old 08-15-2008, 12:17 AM
radioactive's Avatar
radioactive radioactive is offline
tube gear fanatic
 
Join Date: Aug 2003
Location: winnipeg , manitoba
Posts: 172
Quote:
Originally Posted by theblackknight View Post
sean, it was great to meet ya the other night. thanks for helpin me with the radio, i appreciate it.
so,did you figure out why it wouldnt tune past 900kc?
__________________


real radios glow in the dark...
Reply With Quote
  #3  
Old 08-15-2008, 08:36 PM
sean's Avatar
sean sean is offline
VideoKarma Member
 
Join Date: Feb 2004
Location: Sullivan, MO
Posts: 271
We used another radio to listen for the oscillator on the Majestic. The oscillator worked throughout the entire band so that is not the culprit. I would guess something with the detector section. Maybe the detector section of the tuning cap is shorting out at the upper end of the band.

I am still looking for the volume pot from the parted out set. I think that the set I parted out was a model 300 since I remember it having a saturable core reactor in it. However, according to the schematic the volume control has the same value as that in the model 310, 200k ohms. I was able to find what I think was the tone pot from that set with the power switch on the back. Have you tried spraying some contact cleaner inside the volume pot? If the pot is constructed the way that many pots were from that era, it may be repairable. I will have to take this tone pot apart to see how it is made.
__________________
Sean - WØKPX
Reply With Quote
  #4  
Old 08-15-2008, 08:44 PM
theblackknight's Avatar
theblackknight theblackknight is offline
<--- BMW 635CSi
 
Join Date: Oct 2006
Location: St. Louis, MO
Posts: 33
the piece of carbon that goes around the inside of the pot is worn beyond repair. I've diassemebled the entire pot and done a TON of messing around with it on a multimeter and nothing helps. This pot is much different than any other I have seen, I think it is poorly designed.


Mine has the tone control which seems to work OK. the tone control is rated different from the volume one IIRC so I don't think it would work in the volume cntrl spot. But if you don't need the tone control I wouldnt mind having it as a spare.


Henry
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 04:07 AM.



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