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