Turntable speed accuracy

Dev, As I wrote, I used the Walker because (1) the exact final speed adjustment using only the Lenco idler wheel requires a bit of fiddling. (For example, you have to remove the platter to loosen the adjustment screws, the way I have rebuilt mine, then replace the platter to set the speed, then remove the platter to tighten down the adjustment screws, then replace the platter again, etc.) And, (2) there are some unrelated benefits of using a motor controller; namely it isolates the tt motor from the AC line. Thus any EMI emanating from the motor cannot get back to contaminate AC feeding my phono stage, etc. Is that clear enough? Nothing mysterious.

Also, I already own the Walker, so why not use it? The Walker is useless with any of my other tt's, which are all direct-drive.

Lewm, thx that's great info.

One more thing. I realized whilst taking my evening stroll that I had misrepresented the Lenco. I alone have set up mine so that the speed adjustment is so tedious. On a stock Lenco, there is an external lever that allows you to select 16, 33, 45m or 78 rpm without ever removing the platter, once you have manually set the idler wheel in relation to the motor shaft. So, possibly the guy who told you that the speed was not spot on was using a stock Lenco L75 and was not hip to the fact that a small speed error can be easily corrected with a little DIY effort. I believed that firmly and permanently anchoring the distal end of the idler arm was preferable to using the external adjustment mechanism, wherein the pivot of the idler arm rides on a rail across the motor drive shaft, as you select speed.

Lewm: " I believed that firmly and permanently anchoring the distal end of the idler arm was preferable to using the external adjustment mechanism, wherein the pivot of the idler arm rides on a rail across the motor drive shaft, as you select speed."

I agree. All Lenco tables in stock form have speed issue. Not the fault of the motor, idler wheeel, nor the design. It is in the sliding mechanism that holds the idler arm that is always loose. You can hold it and feel it with your fingers and it's loose and it is this looseness in holding down the idler arm that's preventing the speed to be spot on. You can lock it down of course but then you lose the speed adjustability, hence the PTP approach but adjusting speed would be, indeed, a pain in the arse. Only by keep the opposite end of the idler wheel solidly in place will the speed be stable. It's a very mechanical turntable and if the idler wheel is allowed to move even microscopically on the tapered pulley the speed will change. I have several stock Lencos and they all have the same issue. It's no wonder some diyers made a micrometer to slide the idler arm in keeping in position and having the adjustment ability.

Part number 14 is the culprit.

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Hiho, thats crazy and thanks for sharing. That's exactly what I enjoy about these forumns sharing such, I'm always open minded, learning something new and find tables alone there is allot to learn.