1950s Zenith Tube Radio
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I found one like this not long ago. I got rid of the selenium rectifier just to be safe. All it takes is a 1N4007 diode. What values are on the new electrolytics you put in?
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lol the cat is funny
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Hey Dan, I'm currently experimenting on the value of the new surge resistor you'll need to add when you swap from selenium to silicon rectifier. We need to keep the plate voltage on our 35C5s below 130V. Ohms law says it should be 440 ohms. I tried that and was getting only 85V at the plate. Lowered value to 240 ohms, and got it up another 10V. It'll probably end up around 100 ohms, but I'll let you know what I settle on for my Zenith.
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@1xcalibur hm your comments aren't showing up so idk what you're saying sorry...
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Very nice! Nice to see you show the inside. That thing is a selenium rectifier, AllAmericanFiveRadio knows well about those. As for the solder, did you try dapping new solder on it while the iron heated it? Cause the old solder might be hard to melt sometimes unless you "start it off" with new solder.
CassetteMaster 1 year ago
@CassetteMaster hm that's a cool idea, but I managed to fix it without de-soldering that part. thanks for the comment! :)
coolbluelights 1 year ago
It's a C725L - 1959 vintage.
1938Silvertone 2 years ago
Thanks! someone else told me it was from 1960, so we're pretty close :-)
coolbluelights 2 years ago