Finished a Stromberg 400H. Did little more than recapping, and it works well. Then I got another 400H and did the same--recapping, replacing bad tubes & resistors. This is a link to an album showing both sets:
https://picasaweb.google.com/coldrb/...eat=directlink
But the second one doesn't work well. For example, each station is received at equal strength at two frequencies 60 kilocycles apart. All I can do is multimeter testing. So I put the chassis side-by-side and checked voltages and continuity. Now I have data with anomalities which I don't understand (The only thing I've figured out is that the second set may have a short in the capacitor can I rebuilt [C26]).
Hopefully, with a simple 5-tube radio, someone can get me pointed in the right direction. I've posted schematic, wiring diagram, voltage data, continuity data. These are in the album, but these single-pic links give better resolution.
Schematic:
https://lh5.googleusercontent.com/-E...%252520100.jpg
Wiring Diagram:
https://lh3.googleusercontent.com/-h...%252520126.jpg
Voltage Data:
https://lh5.googleusercontent.com/-z...%252520120.jpg
Continuity Data:
https://lh5.googleusercontent.com/-c...%252520122.jpg
Other Tests:
https://lh3.googleusercontent.com/--...%252520124.jpg
If anyone has time to look at this stuff, I'd really appreciate advice.
- Winky