"Richard Knoppow" wrote in message
m...

"Edward Knobloch" wrote in message
news:n6gvk.335$1a2.107@trnddc04...
Hi, Gang

If you enter the terms "hp-200 Hewlett thesis" in to
Google search,
one of the results is Google Books, which has some of Jim
Williams'
book "Analog Circuit Design". Chapter 7 of the book is
an appreciation
of the HP-200, and an attempt to better its distortion
performance
using modern parts. It's a fascinating chapter, giving a
glimpse
of how an expert designer thinks. Also fascinating are
excerpts
from Bill Hewlett's 1939 Stanford thesis about the
original design.

73,
Ed Knobloch

Bill Hewlett's original patent on the Wein bridge
oscillator is USP 2583649. It can be found on either the
patent office site at http://www.uspto.gov or on Google
patents. Google has the advantage that one can download a
PDF directly. There is likely also additional stuff on the
Hewlett-Packard Memory Project site at:
Ooops, I didn't paste the URL, it is:
http://www.hpmemory.org


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Richard Knoppow
Los Angeles
WB6KBL