Videokarma.org

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

We appreciate your help

in keeping this site going.
 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
  #1  
Old 04-27-2023, 04:18 PM
Dubis7's Avatar
Dubis7 Dubis7 is offline
Alchemizes cash to tubes
 
Join Date: Nov 2014
Location: Leesburg, VA.
Posts: 397
Basic GE AA5 Clock Radio - No Signal at one end of the band?

Decided to pull my GE C-403 clock radio off the shelf and get it going again. The electrolytics were dead of course, and I went ahead and replaced C2, which was a paper cap. The schematic (which I've attached) reads 47mmf, but when I took it out the actual cap was .047. I replaced it with a spare of the same value I had on hand, swapped out the filter caps and got it working!

Except!

When I tune it to the lower end of the band, the signal completely dies. Just some crackling. I also noticed that the actual stations seem to be just a hair off what they are on my other AA5 set that I restored, but that may just be from the simplicity of the circuit.

Fiddling with the two transformer adjustments did nothing, and there are few parts left to even replace. I even went ahead and swapped C2 with a 47PF capacitor I had ordered, which only killed my signal until I swapped it back. Is anyone familiar with this sort of problem?

Video of the symptom is here:

https://photos.google.com/share/AF1Q...VIY3YyelVZZVNn
Attached Files
File Type: pdf radiomuseum-general-electric-co-c403d-188494.pdf (359.0 KB, 11 views)
__________________
To keep your tubes running smoothly, make sure to dust underneath the glass as well.
Reply With Quote
 



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 01:07 AM.



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