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A Simple Test

Maybe everyone is already doing this andI'm the last one to figure this out, but I've tried a simple test to determine the degree of motor noise that is transfered to the cartridge.

Find a good clean record which has a longer time between a couple of tracks and, while the record is playing between tracks, turn the motor off and then back on. You'll probably detect the disappearance and re-appearance of hum and/or rumble. Any noise remaining when the motor off will be from other areas (surface noise, bearing noise, etc.)

This has been quite useful in helping set proper belt tension (more tension= more noise) and also identify differences and problems in motors as well as quickly identifying whether a motor or belt tweek was useful in reducing noise.

It's been quieter around here lately....

Jim
jimbo3

Showing 3 responses by jphii

jphii
485 posts
 
Thanks Doug.

The router is about 10 grand. I've been looking at them for about a year. I can use it for many things at the shop, especially doing cabinet work. Anything it can do for the turnatbles is just a bonus!!
jphii
485 posts
 
Doud,

Don't try it. It will leave a nasty residue, which I am sure will piss you off! And it will probably eat the mylar.

Trust me on this.

Joe
jphii
485 posts
 
Doug,

100' roll? Where did you find it? I was going to use VHS tape for the next 2 tables, but if you can turn me on to your source, I'd rather go mylar.

I know about the no motor noise. But, this just remined me that the reason my battery power has not shown up yet is I forgot to send Chris a check. OOPS! Guess I'll have to do that on Monday.

I also lookes at a CNC router table last week at the Carolina's Wood Expo. They are made right up the road in Durham. So, I think I'm going to buy one. SO, that means I'll have the Cocobolo platter soon!
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