STOP the TECHIE 1200 Ringing !

[SiT4]

Ok thanks. Just playing devils advocate, could the dynamat be added without stripping the existing rubber off first ?

[Ianmac]

I wouldnt. If the existing rubber is not in contact with the platter whats the point of putting on an energy absorber on top of it?

[SiT4]

Fair enough.

[HD Goofnut]

Looks great Ian, thinking out loud is the Technics platter balanced?

[Ianmac]

I did try to balance my platters using old technology and failed. I need to make two knife edge bearings or similar very low friction bearings and rotate the platter in a vertical position on a rigid structure that will accept a 12" diameter. I cannot access anything like that due to lock down plus its not something one can do easily at home.
I have looked on the net and there does appear to be DIY electronic methods of measuring dynamic balance.
https://apps.apple.com/us/app/vibrat...is/id817385888
Im not a software expert but I do have (though rarely use) an iphone.

This could be used for any platter so any experts on the forum that could help?
Ill do a general post
Ian

[Bacek]

But if you place phone on a platter you will actually create imbalance, and I guess platters own imbalance will be much lower then that.

Ahh, ok, phone needs to be placed on chassis, not on a platter itself. Nut sure if normal speed of a platter will be enough to pick it but I could try.

Not an IPhone, but I have placed it on a chassis. I can hardly see (or don't see) any difference between spinning and stopped platter. But I can easily observe knocking on the floor. So I guess for me better is to invest in some sort of improved suspension for turntable.

I guess speed must be much faster then 45 rpm to detect it with a phone.

Any way I already bought used platter for around 20USD and I'm going to dump it same way with some Dynamat or similar.