From: Billy Blastov <ridiculousprocess@gmail.com>

On Thursday, April 10, 2003 at 9:45:09 PM UTC-7, Harv wrote:

"Mark D. Zacharias" <mzach...@yis.us> wrote in message news:b7573f$aucnu$1...@ID-180484.news.dfncis.de...

On the turntable platter, yes. But the motor pulley?

mz

There was one little black dot of belt crud on the brass motor pulley, there were many little dots of black belt crud and a line of black on the flange
on the underside of the platter where the belt rides and transfers the rotation of the motor pulley to the platter.. the belt itself also had some excess crud on it. Cleaning all three of these solved the problem. As I've explained, the waver in the markings on the edge of the platter under the orange strobe was an exactly repeating pattern which seemed to directly correspond to the rotation of the platter.. so I suspect the brass motor pulley had very little to do with it as it was almost clean, and that the crud on the flange under the platter where the belt rides had the most to do with it..
At any rate, when I get a round to it, I'll buy another belt anyway.. but
for now, the cleaning solved the problem, which I still believe had absolutely nothing to do with the turntable's electronics since it runs flawlessly now, consistantly, and the strobe markings simply do not quiver
or waver at all when it's running..
I don't use the turntable every day. Sometimes I don't use it for weeks. Belts deteriorate over time since they're just a big rubber band.. albeit a higher quality of rubber band than you'd buy in a $1.00 pack of 100 at an office supply store.. they're not forever. This one is obviously past its prime, although visually it looks okay.. a replacement is in order..
Harv

Thanks to everyone that pitched in on this fix... yes, it is 2022 and I resurrected my old SLB2 by following the advice here.
speed was wavering even with a new belt. Electrical contact cleaner on the VR's and pot... good scrub of the platter and spindle...
steady as she can be... my teenagers are about to experience vinyl for the first time in their lives...
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