I was most confused by George's reference to "the counter", which
appeared with no explanation that I could find.
It is much simpler than I thought.
> Date: Mon, 22 Jun 2009 11:23:26 -0700
> From: Michael Biel <[log in to unmask]>
> Subject: Re: (Fwd) [ARSCLIST] Fwd: Recording Speed
> I understand what George is saying partially because I've seen him
> do it
> and I am lucky enough to have one of his calibration discs. In case
> Doug and others still do not understand it, Doug's snip cut out the
> important info and left in material that has no meaning without the
> snipped part. =20
> In 1982 George commissioned a 7-inch pressing made of a 450 Hz.
> tone cut
> at 45.0 RPM. That disc can be played at any RPM and a frequency
> will show a reading that is 10 times that RPM. (Play it at 73.7 RPM
> it shows 737.0 Hz. 78.26 shows 782.6 Hz. Etc.) If you have a
> counter handy, you can find what rotational speed you are using. BUT,
> if you include a few seconds of that calibration disc played on the
> turntable at the time of your transfer of the record you are
> working on,
> then later on that frequency can be read with a counter and at any
> you can establish the rotational speed you used. It's like an audible
> strobe disc that has the unique ability to be recorded, and it is as
> accurate as your frequency counter is. Sure, you could use a normal
> test disc of, say, a 1000 Hz. tone, but George's disc is more directly
> readable without using math to have to determine percentage of 1000
> whatever tone you used.
> Mike Biel [log in to unmask] =20