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My Sonora is a model LWU-181. The only thing I can find is a schematic on NA that says "pre 1945". I pulled the chassis to clean the controls and the only caps that have been replaced are the electrolytics. I got this set the first time back in '91 at a radio show and I don't think I ever pulled the chassis. So, those caps have been in there at least 18 years. They are Nichicon brand and appear to still be in good shape; so, I'll leave them alone and replace the old paper caps.
The Westinghouse is a model WR260 from circa '39.
I also pulled the Sparton chassis to clean it's controls and it appears that every cap is original. It's amazing that those filters are 70+ years old and are still functioning. The radio will still receive a recap just to be on the safe side. My tuning problem is due to a dried out rubber grommet on the tuning shaft. If I hold the shaft in hard enough, I can tune the radio.
I did discover a new radio station during all of this: WIST-690 out of New Orleans. They play "standards" like Sinatra, Perry Como, etc. The older I get, the better I can tolerate this kind of music. It sure beats the usual dull talk crap that's on most other station.
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