12-01-2007, 11:02 AM
Danny, A model 20 speaker will have a nut on the back of the field coil frame. The model 70 (or model 90) speaker is pressed together and has no nut. With the proper output transformer in stalled, the model 20, 70 and 90 speakers will interchange.
I think there is a model 20 speaker listed on ebay right now.
Steve
I think there is a model 20 speaker listed on ebay right now.
Steve
M R Radios C M Tubes