has anyone else tried Lloyd Walkers latest tweak

You're welcome, Rodman. In connection with the mention of crystal-controlled oscillators in my post, I should of course also have mentioned the billions of quartz controlled watches that are out there.

Regards,
-- Al

Dear Rodman, I assume that I am "Mr. L". If so, please tell me how your last post in any way addresses the question of whether an inert crystal (not one that is energized in any way) can prevent RFI from affecting one's vinyl playback. Yes, Al pointed out another way in which crystals are/were used in radio, but that does not resolve the issue. I read the relevant literature in my search. When a crystal is excited by RF, it does not remove the RF from the environment; it samples the RF selectively for its particular resonant frequency and then resonates, or not, as I see it.

Traditionally, only a few stones don't need clearing(citrine, kyanite, etc.). Unless this crystal is one of those, I would suspect that the stone would need time between listening sessions, in order to clear itself. EMI and RFI, would saturate the crystal, so that it's no longer effective. Is there any drop off in sound quality towards the end of a long listening session?

Alert - possible double post

The really interesting thing about crystals is that they can absorb vibrations of many frequencies - including Very Low frequencies! As when crystals are used in room corners. I suspect focusing on non-audio applications like crystals in radios and watches is a little bit irrelevant to the whole audio applications thing.

Somehow- I couldn't care less! Just enjoy your music!