Sweep Linearity of Various VCO chips

[patchell]

    It took a little digging through my archives, but I found some old
data sheets.

    XR2207:
    10:1 sweep    1%
    100:1            3%
    1000:1            5%

    It was even worse than I remember.

    8038 is specced at 0.2% linearity

    XR2206
    10:1 sweep        2%
    1000:1                8%

    Pretty awful.

    XR2209
    10:1 sweep    1%
    1000:1            5%


    Other interesting things I found when going through this old file
was a page from an old cramer catalog.  A sprague DUAL PNP matched
transistor was only $1.13 (100, delta Vbe 10mV) back then.  Pretty
awful, all things considered.

    Also, and probably of much more interest, a document titled:
Accutronics, A Hammond Corporation Company, Geneva Illinois 60134,
Reverberation and its application.

    This document is 24 pages long.  Lots of diagrams, circuits, and
advice.  I wish I had a scanner.  This would be something to post.

    The next document is titled:
Accutronics, The World Leader in Electronic Reverberation.

    This document is a little strange.  The first 5 pages are data
sheets from Accutronics,  the next page is from Electronotes #60, form
an article titled Electronic Music Studio Hardware by W. M. Hartmann
where he talks about reverb strings.  I am not sure what this is doing
in there.  I suspect somebody else gave this document to me because I
never subscribed to Electronotes.  This is followed by another
accutronics article about home stereo reverberation, and then several
pages of misc reverb information.  Somebody must have just stapled
together a bunch of stuff.

    And finally, I found some data sheets for the MN3011, MN3005,
MN3101.  Have no idea where these came from, since I never used BBD
devices.

    If anybody is interested in any of this "stuff", I will see what I
can do about getting it scanned and posted.

--
 -Jim
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