UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

vidjoman · 18th Oct 2020, 8:46 am

Actual speed was always a variable. The motor had to contend with a single 45 that weighed almost nothing to a turntable full of heavy 78 rpm discs that weighed a lot more. I understood that the estimated speed was about +3% empty and -3% with a full load. This is also subject to the motor and turntable bearings together with the idler drive all being in new condition.
It would seem that your customers TT is behaving normally and within specification. The details in post #9 covers variation with voltage difference not the actual turntable speed.

18th Oct 2020, 8:46 am	#12
vidjoman Dekatron Join Date: Jun 2013 Location: East Sussex, UK. Posts: 3,326	Re: Accuracy of BSR turntables. Actual speed was always a variable. The motor had to contend with a single 45 that weighed almost nothing to a turntable full of heavy 78 rpm discs that weighed a lot more. I understood that the estimated speed was about +3% empty and -3% with a full load. This is also subject to the motor and turntable bearings together with the idler drive all being in new condition. It would seem that your customers TT is behaving normally and within specification. The details in post #9 covers variation with voltage difference not the actual turntable speed.