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Thorens Turntable Speed Indicator Accessory

Perusing ebay I noticed this unusual accessory made by Thorens. I like the concept that this speed indicator, made from aluminum, is built to last unlike the cardboard indicators I’ve previously used and possibly it is more precise.

Just one of those curiosity things for me especially as Internet searches resulted in a complete absence of information on this particular device, surprising as Thorens products are so popular. Anybody seen one before? Any guess when these were available, 1950's, early 1960s?
tubes108

Showing 2 responses by elizabeth

elizabeth
6,726 posts
 
Too bad it is a 50hz disc. no good in the USA. You would have to be in Europe, or some country that uses a 50 hz A/C supply to actually work
elizabeth
6,726 posts
 
Belt thickness. The speed relates to the middle of the belt. So speed off, get a thinner or thicker belt. Thicker would speed it up, thinner slow it down.
Do NOT forget: measure the speed with an LP playing!! the Lp playing on many belt driven TTs WILL slow it down a bit. So if you check it only with no Lp playing, it may run slow when it IS playing a LP.
This does not happen (usually) on direct drive TTs.
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