trying to understand the Linn motor

Valhalla boards need to be refreshed, they tend to eat themselves through thermal wear. Off or on. I kept my valhalla’d LP12 on a power bar switched power arrangement and only powered up the table with 120vac, when it was time to use the table. But I see you’ve refreshed the board. They can literally burn the boards out and traces right off. (long term thermal stressing)

Another option is the very decent Hercules board for finally having 33/45 on the same table and to keep the 50hz motor. (Used original Lingos suffer the same thermal fate and need to be rebuilt.)

Both the lingo,and the Valhalla have the two stage power thing going on...and I think the Hercules as well.

It is an easy swap. (the Hercules board)

Soft foam earplugs are good for plugging the bearing well when flipping the table over to do the board swap.
https://www.ebay.com/itm/HERCULES-II-Linn-LP12-NEW-33-45rpm-CE-WORLDWIDE-50-60Hz-110-230v-Easy-to-Fi...

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

Linn likes to run the TT motor at lower voltages to reduce motor vibrations... The Lingo drops the voltage to 60V once it stabilise... The Valhalla is locked at 85V all the time.

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....