Edison 2/4 conversion pulley assembly differences
Posted: Tue Aug 13, 2024 10:06 pm
Hi All --
There is no end of learning about Edison Home phonographs!
Edison's light bulb went off for me today on yet another issue. The left half (pulley side) of the 2/4 gear assembly I assumed UNTIL TODAY was always a "female" with four holes--onto which the other assembly side (with two "male" prongs) inserted to spin for 2m records. Whenever I pulled apart some model Bs (and found prongs on either side of that assembly) I just assumed that some hobbyists had mismatched the two parts.
What I seem to have learned today (and I need to be confirmed in it) is that the Edison model B (and I assume the A too) 2/4 conversion assemblies had prongs either side that hit and held when pressed together for 2m mode--and the four holes on the pulley side were not introduced until the model C.
Have I learned correctly?
MP
There is no end of learning about Edison Home phonographs!
Edison's light bulb went off for me today on yet another issue. The left half (pulley side) of the 2/4 gear assembly I assumed UNTIL TODAY was always a "female" with four holes--onto which the other assembly side (with two "male" prongs) inserted to spin for 2m records. Whenever I pulled apart some model Bs (and found prongs on either side of that assembly) I just assumed that some hobbyists had mismatched the two parts.
What I seem to have learned today (and I need to be confirmed in it) is that the Edison model B (and I assume the A too) 2/4 conversion assemblies had prongs either side that hit and held when pressed together for 2m mode--and the four holes on the pulley side were not introduced until the model C.
Have I learned correctly?
MP