This is some information on vacuum tube characteristics and on audio designs based on vacuum tubes. Covers information on tube data and fitting of equations to characteristic data. These have evolved using Microsoft Excel spreadsheets and vba suboutines and functions. I have a whole bunch of xls design files for different circuit configurations, equalizations, optimizations, etc. I have no idea if there is any interest out there for this material.
Email me at either 'd_heiser@att.net' or 'dheiser594@gmail.com' if you want any of this stuff
CONTENTS
Generic Values of Amplification
Factor, Plate Resistance and Transconductane for some tubes"