trying to understand the Linn motor


I have an old Valhalla Linn and it may be time to change its motor.
The board has been serviced and all caps upgraded.
As far as I can tell, the board produces 85 volts at 50 Hz.
If I am wrong on this, please let me know.

However, the motor on the Linn (Premotec 9904 111 31813) is 
rated at 110 volts (with -15% +10% voltage tolerance according to its spec).
This indicates that the motor should not be driven with less than
93.5 volts (-15%).

So, what am I missing ?

Thanks


128x128cakyol

Showing 3 responses by cakyol

My situation is a bit weird....

I have an Ariston RD11 in the US.  Its Valhalla board has the 3.9Mhz crystal (for 60Hz).  However, at the output, it has the 0.22uF capacitor designed for the "110 V ac-50Hz: C=0.22mF, speed = 250 rpm" output.

I cannot figure out what the board is outputting.  Is it 50Hz or 60Hz ?

I need a scope to figure it out.


I need a 50Hz pulley for my US Ariston since moving to a hercules board requires the motor to be driven at 50 Hz.  I can always change the 45 rpm crystal on the hercules to a 3.9Mhz and make it work at 60 Hz but that is my last option.  This way, I could drive both 50Hz or 60Hz motors, but I prefer the pulley method first.
Thanks

I almost always give my platter a hand spin as I power it on to make it easier on the motor & the belt.  I guess as long as I continue doing that I can probably lower the voltage even more (like 60V as in Lingo).

I wonder what the lowest threshold voltage is for it to stop altogether.  I will make that experiment one day....