I presume that Delco was not making tubes in the early 1930's.... So my question is who was making these tubes for Delco? (Current guess is Sylvania.)
Any info would be appreciated... E-mail: kd4hsh@carolina.rr.com
These tubes are in, what I think is, the first series of radios made by Delco circa 1931.
I have the RA-3 version table model TRF for 32 Volt farm lighting systems. I think these were unique radios because they were designed to get their high voltage from a built-in or table model dynamotor! Follow the links below for more on this...
Right now I'm missing one of the Delco D236's any chance you have one for sale? It does not have to test good.....
A pair of D238's are run in parallel for the audio output.
All the tubes have the little J1 - do you know what that means?
D236's are used for the TRF & Det./1st. audio.
