The Magnetic Amplifier
February 2006
A Lost Technology of the 1950s — Rugged, dependable, EMP-proof, and capable of handling greater electrical powers than either transistor or tube, the magnetic amplifier is a simple device that can be built by anyone.
Vacuum Tube In Its 118th Year: Same Old Challenges
November 2006
The engineering challenges of the hot cathode vacuum tube — an invention dated 1906 — are the same today as they were then. The inventing of new, more compact and efficient vacuum-tube designs proliferated madly up until the 1950s, but the art has been frozen ever since.
