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

Ted Kendall · 18th Oct 2020, 9:14 am

Comparisons are odious, as the bard said. If the thing is within 1% of nominal speed under ideal conditions, I'd say that's good going. I have detected something under 1% slow in isolation, but then I have absolute pitch as well. In juxtaposition, just about anybody can detect the minutest difference, by phasing if nothing else - the human senses are very good in this regard. Historically, professional tape machines and cutting lathes themselves weren't always perfectly on speed, particularly constant angular tension transports like the Ampex 300 series. The deck is within spec, and that should be the end of the matter.

18th Oct 2020, 9:14 am	#13
Ted Kendall Dekatron Join Date: Jul 2008 Location: Kington, Herefordshire, UK. Posts: 3,675	Re: Accuracy of BSR turntables. Comparisons are odious, as the bard said. If the thing is within 1% of nominal speed under ideal conditions, I'd say that's good going. I have detected something under 1% slow in isolation, but then I have absolute pitch as well. In juxtaposition, just about anybody can detect the minutest difference, by phasing if nothing else - the human senses are very good in this regard. Historically, professional tape machines and cutting lathes themselves weren't always perfectly on speed, particularly constant angular tension transports like the Ampex 300 series. The deck is within spec, and that should be the end of the matter.