[Chas]

Rob,

I have two Radiola 25 frames cut down for test panels. I only need one test panel. I also have a 25 in a phono panel, but both rheostats are of a high value (AC). For the 25 DC as in the 28, only one tube has filament control for volume and they are around 60 ohms.

However, one control is a flat-pack resistance and the other is the round cartridge.

>>> I must know what type control flat or round resistance for the volume <<<

I also found two 2 mf Stromberg-Carlson bypass caps. But no brackets FWIR these were from the AR-812 v-cat of which the bracket was integral with the cabinet... Bypassing the detector and the B+ 90 with these should be fine. There may be pairs of holes in the 28 frame where these should be mounted, a flat strip of metal with two holes and long screws/nuts would be fine.

Please advise resistance type...

Chas