[Norm_N_Tam]

From the Antique Radios forum:

RCA certainly investigated and tested the dynatron oscillator circuit before the 24 tube was placed on the market; their senior tube engineers decided that the effect had too much variation from one tube to the next for them to support it as a recommended application.  Nevertheless, Crosley used it anyway.  When RCA fixed the problem in the 24A and discontinued the 24, a lot of Crosley owners were left high and dry.  Crosley sued, but RCA successfully argued that since they never supported dynatron operation of the 24 in the first place, they were not obligated to support it in the 24A.  Fortunately, in most cases it was just a matter of changing a resistor or two to get a 24A to oscillate in those radios.

Does anyone know which model Philco superheterodyne radios used a dynatron oscillator?  I'm interested to look at the schematics of such models.

Thank you!