Grundig / Perpetuum Ebner turntable spins too fast

[sreams]

Hello all,

I picked up an old Grundig console recently:

http://www.radiomuseum.org/r/grundig_7070w3d.html

I think it's from the 50s, and it has a Perpetuum Ebner turntable that does 33, 45, and 78rpm. It seems to spin much too fast across the board, although the issue is most apparent at 33rpm. How does one adjust the speed of these old turntables? Thanks ahead.

-S

 

[vinyldavid]

ummmmm......Can we have the model # of the PE?

 

[sreams]

Well... I don't see a model number for the turntable portion of the unit. It's a Grundig 7070 W/3D. It uses a PE8 cartridge.

-S

 

[sreams]

Okay... a bit of research tells me this unit uses the Perpetuum Ebner "Rex" turntable... I believe.

Like the one that is used in this unit:

http://hupse.eu/radio/frameset.htm?grundig_8050.htm&ContentFrame

-S

 

[Fred Longworth]

If it is going 20% fast, you have a 50 Hz pulley on there, running on a 60 Hz line.

Fred

 

[merrylander]

In which case it might be possible to measure the pulley and use math to calculate the diameter for 60Hz as it will be smaller than the 50Hz. Get it machined down.