Fun with vinyl measurements

[Thomas_A]

I think the LP sounds as measured, a bit smeared cymbals. I think your single might be differently mastered or cut, dropping a bit at HF. The compilation LP track; it is the third track and not the first one as the original LP, and I believe they threw it in without any thoughts on tracing problems. Same level as CD on lateral, but going up on vertical. So the Shure does not trace it properly. I'll redo this on the original 1979 LP when it arrives.

 

[Thomas_A]

I'd buy some for $8, if he can do lower values around 2, 2.5 and 3 degrees.

Ok, thanks, this is certainly possible. I've no idea how pursue this since selling stuff like this cannot be done at ASR.

 

[Balle Clorin]

EBay?

 

[Thomas_A]

EBay?

Perhaps. Will report back in a few weeks how it goes.

 

[somebodyelse]

I'd buy some for $8, if he can do lower values around 2, 2.5 and 3 degrees.

Should be trivial on resin/UV printers. Probably not too hard with a reasonable extruder either.

 

[Thomas_A]

Suggestion: next batch tell him to print a giant "6" on them, or 5 or 9 or whatever "size" they are.

Some more.

 

[Thomas_A]

Would a slot or hole be best? And any size contraints for headshells

 

[Jimi Floyd]

Some more.
View attachment 515813View attachment 515814

Is your friend Italian? "piatta" is Italian for "flat".

 

[sqrl]

Would a slot or hole be best? And any size contraints for headshells

I'd prefer a M2.5 hole, so the shim sides stay parallel with the cartridge. However, if you are trying to compensate for deviated cantilevers, you might also want slots.

 

[Thomas_A]

Is your friend Italian? "piatta" is Italian for "flat".

I guess it is ”platta” which is flat in Swedish. (Otherwise we are both half Brazilians so that would be plano or plana.

 

[Balle Clorin]

Would a slot or hole be best? And any size contraints for headshells

I find that a hole is just fine so far, avoids shim displacing it-self, but in some headshells I can see that only hole may prevent cartridge placement at the very front or back

 

[Thomas_A]

First try with the smaller shim 6 degree. Tried with the bigger oned on my 4 g arm and a Shure V15Vx also but they are visually quite big. Below is the v15v with my 7.5 g arm

 

[Balle Clorin]

fastering hardware is both 2.5mm and 2.6mm, so holes in shim should accommodate both=>2.6mm

 

[Thomas_A]

fastering hardware is both 2.5mm and 2.6mm, so holes in shim should accommodate both=>2.6mm

They do. My friend is printing variants. From 0.5 degree and up with 4 holes. Can also be used as azimuth shims. Was thinking of also doing VTA shims with azimuth correction. +/- 0.5 degree

 

[Balle Clorin]

maybe he could print this fulcrum shape..

It makes the azimuth adjustable to any degree (up to the the height of the central ridge determine)...Very easy to adjust azimuth without replacing shim

 

[Thomas_A]

maybe he could print this fulcrum shape..
View attachment 516428

It makes the azimuth adjustable to any degree (up to the the height of the central ridge determine)...Very easy to adjust azimuth without replacing shim

That’s one idea. Right now there are more shim variants than I can cope to test. I want to settle with a set that I can have for measurements eg 3-4-5-6-7 degree using lateral and vertical sine. It takes time to mount and align for each shim.

 

[JP]

I think I FINALLY got a W&F process working with low frequency signals direct from motor FGs.

 

[somebodyelse]

So what's the process?

 

[JP]

Playing with decomposition of identifiable components.

So what's the process?

The most significant take away was using zero-crossings due to the lower frequency, but sinc interpolation instead of linear for the same reason. It's not that impressive once you know it.

 

[JP]

I'll probably make this a web app like sjplot, but in react/js so it's interactive - would be good for the decomposition plot.