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Platter mat insanity

I was doing an idler upgrade to my 401 (more anon) and when finished used the Keystrobe disk to ensure speed. I use a 10" EP as a platter mat. I played a bunch of albums and it sounded fantastic. On the 6th side, I noticed I'd forgot to remove the 4" strobe disc. Duh. I took it off and figured VTA was responsible. So I lowered the arm to see if that made it sound so good. Nope. Put back on the 4" strobe disk and raised arm. The awesome sound returned. So air under the record removed haze, smearing, flattened soundstage and muddled bass; and made it so more musical. Comments... 
128x128noromance
lewm
13,118 posts
 
Resomat, anyone?
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noromance's avatar
noromance OP
9,837 posts
 
@bdp24 Good to see Vic is hopefully bringing the Terminator back. He did stop building the Salvation and hopes to make the arms in Russia?
@lewm Yes. I’m aware of the Resomat and have been intrigued by Vic’s ideas on no clamping etc. I tried lots of mat ideas a while ago including felt floor protectors but the result was always a softening and muddying of the music. This is the first time trying no mat as such under the LP. I suspect that even the Resomat points may stabilize and damp the record enough to reduce the impact of lable area only support.
noromance's avatar
noromance OP
9,837 posts
 
@islandmandan Dan, I'm delighted you hear and (perhaps) approve of the strobe disk effect. 
PS... I never got around to doing the AF idler review due to the above. Anon.
bdp24's avatar
bdp24
9,821 posts
 

I like and agree with all of Victor Pattachiolla’s designs EXCEPT the Resomat. The Salvation turntable, excellent; the Terminator arm, excellent (and a great value). But the Resomat, like the Transcriptors turntable, suspends the LP in air, not a good idea imo.

It was long ago established that an LP groove being traced by a phono cartridge stylus causes the vinyl to vibrate/resonate like crazy, especially if the vinyl is suspended in the air, with no surface below it to absorb and damp that vibration. The vibration in the vinyl created by the stylus travels from the location of the stylus in the groove both out to the edge of the LP and in to the center hole of the LP, that vibration then reflected back from those locations to the stylus, where it is read by the stylus as a time-delayed "echo". How can that be a good thing?! Yes, the echo is a very low-level signal, but the dimensions of the LP groove, and the amount of travel exhibited by the stylus, are extremely tiny, and very vulnerable to any added vibration. IMO, a solid surface in full contact with the LP, the material of that surface intended to absorb and damp the vibrations inherent in LP playback, is the "correct" approach.

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