RE: Tonearm Mounting

Posted by M3 lover (A) on July 5, 2012 at 16:21:45

In Reply to: Tonearm Mounting/Geometry Question.... posted by Mr Blue Sky on July 5, 2012 at 14:33:39:

Mr Blue,

The measurement for pivot point (tonearm) to stylus tip includes the sum of overhang (typically 15 mm) and pivot to spindle distances. So given your measurements the pivot to spindle distance would be 204 mm. Consider that with stylus alignment 1 mm will be a huge distance.

Now for the Baerwald, or any other popular alignment, it will be a combination of setting both overhang and offset angle (see John's equations). The alternative alignments are based on different assumptions for minimizing distortion. Since a pivoted arm scribes an arc and the mastering cutter head traveled on a straight line tangent, compromise is necessary. Choosing an alignment formula means lowest average distortion across the whole record side or lowering distortion toward the end of the record where it becomes more critical.

I'd suggest a search here on the various alignments to help decide if you want the Baerwald or some other option if you are unclear about that.

"The secret of life is honesty and fair dealing, if you can fake that you've got it made." Groucho

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Follow Ups Full Thread

Topic - Tonearm Mounting/Geometry Question.... - Mr Blue Sky 14:33:39 07/05/12 (18)

Yes, maybe... - tketcham 17:52:32 07/05/12 (10)

Forgive me if this is a dumb question, but... - Mr Blue Sky 18:15:09 07/05/12 (9)

RE: Forgive me if this is a dumb question, but... - dtut 10:02:01 07/06/12 (4)

Not sure I understand.... - Mr Blue Sky 12:06:32 07/06/12 (2)

RE: Not sure I understand.... - dtut 15:18:09 07/06/12 (1)

Desperation is the mother of invention... - tketcham 05:59:53 07/07/12 (0)

That is a... - tketcham 10:23:22 07/06/12 (0)

No dumb questions, only dumb designs... - tketcham 04:32:18 07/06/12 (2)

RE: No dumb questions, only dumb designs... - John Elison 07:15:27 07/06/12 (1)

Worst may be best... - tketcham 08:23:30 07/06/12 (0)

RE: Forgive me if this is a dumb question, but... - John Elison 20:13:49 07/05/12 (0)

RE: Tonearm Mounting - M3 lover 16:21:45 07/05/12 (0)

Sounds right to me... - John Elison 15:56:06 07/05/12 (5)

If I had known math ... - reelsmith. 17:27:56 07/05/12 (4)

CD players rule! ;-) /nt\ - John Elison 20:32:56 07/05/12 (3)

Oh, John.... - JimK 08:07:22 07/06/12 (2)

RE: Oh, John.... - John Elison 09:50:29 07/06/12 (1)

I miss my tubes. - JimK 12:56:56 07/06/12 (0)

Follow Ups

RE: Tonearm Mounting - M3 lover 16:21:45 07/05/12 (0)

RE: Tonearm Mounting

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