Measuring Turntable Platter Speed
I have an older Rega P2 that seems to warble (for lack of a better word) when playing. It's not that it's fast or slow, but I can hear slight, quick, pitch changes when playing a record. I put a new belt on, but no change.
Is there a method or relatively inexpensive instrument that I could use to monitor small fluctuations in platter speed?
Thanks in advance - Jim S.
KAB, the folks that cater to the Technics SL1200 crowd with parts and accessories sells a very nice strobe disc and lazer light. Amazing just how still my rebuilt Victor TT71 platter looks when using it. Anyway, disc and lazer is $109.00 https://www.kabusa.com/strobe.htm The phone apps have plenty written about them, not super accurate but a good comparative tool. I use one as well, the RPM Speed and Wow app.
BillWojo |
@stilljim Sorry, I think I just read the title of the thread and didn't read the entirety of your post. I don't think the device I mentioned will help with that. I'm not familiar with that table, but you say it's "older". Ever changed the belt? |
The P2's performance could possibly be significantly improved by replacing the plastic subplatter. But it's $220. Perhaps not worth it. https://groovetracer.com/subplatter_groovetracer.htm That was my experience with a P5. The Asylum forum may have additional insight. You might find info of a less expensive alternative.
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IF you had the worst case of WOW (slow then fast then slow) the RPM might be affected. But it would have to be way off. No record today would cause it unless the the hole is punched off center. I haven't seen any or had any for a LONG time, unless it's on UTube. Motor, Spindle, Spindle Well, pullies and belt. There nothing else to cause it unless you actually have an electrical contact problem in the motor or powersupply etc. I've seen it in fractile motors for rem drives TT.. Washing machine motors. Russco/Sparta/QRK and the ity bitty Garrards.. :-) Regards |
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