Re: [ARSCLIST] Mostly for laughs

[Don Cox <doncox@xxxxxxxxxxxxxx>]

On 19/10/06, Mike Richter wrote:
> Steven C. Barr(x) wrote:
>> ----- Original Message ----- 
>> From: "Mike Richter" <mrichter@xxxxxxx>
>>>    http://www.mapleshaderecords.com/audioproducts/index.php
>>> 
>>> They don't show the snake oil to lubricate the CD spindle, though.
>>> 
>> During the phonograph "boom years" (mid-teens) there waa a phonograph
>> make, Vitaphone, which actually had its needle on the end of a long
>> piece of wood...whose other end connected to the diaphraghm.
>> Supposedly, the sound "mellowed" while traveling through the
>> wood...?!
> 
> It certainly would have mellowed. Lower frequencies would see
> resonances and higher ones would be damped where the wood actually
> dissipated energy.
> 
> In fact, there's validity behind some of the "solutions" being offered
> on that page. Many turntables are not only sources for subsonic rumble
> but also resonators at those frequencies. Unabated, they can saturate
> the amplification chain and degrade the sound. Adding weights and,
> particularly, damping in that range can improve things.

Rumble (and feedback of rumble)is a real problem when playing 78s.

I have my turntable mounted on rubber shock-absorbers designed for
electric motors, and then on a softly inflated inner tube. Those absorb
the rumble well, and the price was low.

Regards
-- 
Don Cox
doncox@xxxxxxxxxxxxxx