Lynn wrote:
"Jim Mueller" wrote in message
...
Lynn wrote:
"WW" wrote in message
...
Any one need these? Warren
I don't need any (now) but was tossed back half a century when
I saw the coiled spring-like bushing on the motor's shafts. I think
when you bought a 50 cycle player you got a little package with
one of those springs to convert the player to 60 cycle.
OR, was it just the other way around?
Old Chief Lynn
Many motors have those normally. It's just a way to get the right
size. Note that the second motor, P1241826-1.jpg, only has the bushing
on the 78RPM step of the shaft. The 45 and 33 1/3 RPM steps are bare.
On 50Hz the motor would run slower so the shaft would have to be
larger to get the same turntable speed. The adapter would be used for
50Hz operation.
--
Jim Mueller
Right on! And I had forgotten about the 3 speed changers with a single
speed
synchronous motor. My (our) first suitcase style player had such a motor.
The player is long gone, but still have a couple scratchy 33 1/3's... I
think
Bill Haley... Shake, Rattle & Roll?? is one.
Old Chief Lynn
Actually, these aren't synchronous motors. They're induction motors.
The speed is mostly controlled by the power frequency but it isn't
absolutely locked to it. That's why you don't find motors like these in
high quality record players (or tape recorders, either).
--
Jim Mueller
To get my real email address, replace wrongname with dadoheadman.
Then replace nospam with fastmail. Lastly, replace com with us.