[78-L] stylus measurement

[Bill Klinger]

Don,

The numerical values you asked about refer to the stylus tip _radius_.

Styli having a tip rounded to form a portion of a sphere have been termed
"spherical" styli, ever since Thomas Edison adopted the shape, in 1889.  The
term can be misleading because, in practice, the tip is normally just a
_hemisphere_, at one end of a cylindrical or conical rod.

Cartridge manufacturers and stylus makers cite the radius of that hemisphere
when describing their "spherical"-tip products.

Regards,
Bill
___________________
Bill Klinger
13532 Bass Lake Road
Chardon, OH  44024

(440) 564-9340

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-----Original Message-----
From: 78-l-bounces at klickitat.78online.com
[mailto:78-l-bounces at klickitat.78online.com] On Behalf Of Don Chichester
Sent: Saturday, January 16, 2010 4:14 PM
To: 78-l at klickitat.78online.com
Subject: Re: [78-L] stylus measurement



When we say a stylus has a 3 mil tip (.003 inches) what are we talking
about?  The _diameter_ of the 'ball' at the tip, or the _radius_ of that
'ball?  (By 'ball" I mean the rounded end?  Always has puzzled me.

 

Don (not too sharp) Chichester
 		 	   		  
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