09-23-2014, 02:27 PM
Other models that used the K-17 speaker were 14B, 17B,18B and 118B. You could also use a K-7, K-21, or a K-22 and probably a few others but you would have to replace the output transformer with one designed for push-pull output and disconnect the bucking coil.
Steve
Steve
M R Radios C M Tubes