most brushes basically useless!

Posted by nsgarch (A) on October 10, 2012 at 09:40:25

In Reply to: RE: construction details: posted by adaug on October 10, 2012 at 04:57:45:

Hi Andre,

There are two important considerations:

1.) The first, and I guess the 'most' important thing to look for is how the carbon bristles are "bound" into a brush. In two out of my three samples, the bristles are imbedded in a plastic strip; then the strip (holding the bristles) is clipped or slid into a metal handle. Brushes of this type of construction WILL NOT WORK -- because the plastic part in which the bristles are imbedded is NOT conductive, and so interrupts the flow of static to ground (or even to your hand!) So I have come to the conclusion that brushes of this type, where the carbon bristles are held or imbedded on a non-conductive material (like plastic) are basically USELESS for removing static charges from a record. There may be other carbon brushes out there, besides the Hunt brush, that hold the bristles in a conductive (metal) material. I have not examined them all.

2.) As long as the carbon bristles actually contact a conductive element (in the Hunt brush, the rows of bristles are clamped in place by the aluminum handle) then all that is necessary is for a drain wire to be electrically in contact with the handle (because the handle itself is in electrical contact with the carbon bristles!)

To answer your specific question, I just pulled the endcap off the Hunt brush and placed the stripped end/wires of my little drain wire across the rough edge/end of the handle/extrusion, and then I replace the endcap to hold the wire in place. This is of course temporary. I will eventually solder a little spade or eyelet fitting to the end of the drain wire and then drill a hole in the aluminum handle to attach it with a little metal tapping screw. So in the case of the Hunt brush, at least, there is a clear electrical path from the bristles to the handle to the drain wire. Does that clear it up for you?

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Follow Ups Full Thread

Topic - Carbon bristle record brushes - nsgarch 21:51:41 10/6/12 (20)

RE: Carbon bristle record brushes -photo? - adaug 18:06:19 10/9/12 (3)

construction details: - nsgarch 18:23:41 10/9/12 (2)

RE: construction details: - adaug 04:57:45 10/10/12 (1)

most brushes basically useless! - nsgarch 10/10/1209:40:25 10/10/12 (0)

the result is in! - nsgarch 20:58:26 10/7/12 (2)

I always wanted to try that - violinist3 21:34:22 10/7/12 (1)

The 3 brushes I tested . . . . . . - nsgarch 21:57:39 10/7/12 (0)

Here's something I discovered ... tell me if I'm missing something ... - bjh 08:51:26 10/7/12 (1)

RE: Here's something I discovered ... tell me if I'm missing something ... - nsgarch 09:41:23 10/7/12 (0)

RE: Carbon bristle record brushes - bjh 08:48:03 10/7/12 (1)

RE: Carbon bristle record brushes - nsgarch 09:43:55 10/7/12 (0)

RE: Carbon bristle record brushes - tesla 04:45:35 10/7/12 (0)

RE: Carbon bristle record brushes - mosin 22:51:53 10/6/12 (7)

the important issue, for any of these ideas to work . . . - nsgarch 10:11:42 10/7/12 (0)

RE: Carbon bristle record brushes - John Elison 23:33:53 10/6/12 (5)

RE: Carbon bristle record brushes - mosin 00:50:30 10/7/12 (4)

RE: Carbon bristle record brushes - John Elison 14:44:39 10/7/12 (1)

RE: Carbon bristle record brushes - mosin 14:50:56 10/7/12 (0)

I wonder if Shure's approach with the CF damper brush on - Opus 104 03:17:59 10/7/12 (1)

RE: I wonder if Shure's approach with the CF damper brush on - berndt 11:38:36 10/10/12 (0)

Follow Ups

most brushes basically useless! - nsgarch 10/10/1209:40:25 10/10/12 (0)

most brushes basically useless!

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