John Broskie's Guide to Tube Circuit Analysis & Design

Auto-bias and the circlotron OTL amplifier
Back in 2001, I covered a circuit to balance the idle current (and thus to eliminate the DC offset) of a circlotron OTL amplifier, which easily could have been part of the auto-bias series of blog entries. Here's the link. The title is "Subject: active DC offset correction."






Kit User Guide PDFs
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BCF User Guide

Download PS-3 User Guide

Janus regulator user guide



Tube CAD does the hard math for you.

This program covers 13 types of tube circuits, each one divided into four variations: 52 circuits in all. Tube CAD calculates the noteworthy results, such as gain, phase, output impedance, low frequency cutoff, PSRR, bias voltage, plate and load resistor heat dissipations. Which tube gives the most gain? Tube CAD's scenario comparison feature shows which tube wins.

Windows 95/98/Me/NT/2000/XP


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