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Safety Materials

Hi-Voltage Warning Our important warning about Hi-Voltage!
Safety Document Tube amp safety document!

Stuff of interest

Interesting Forum Threads A few select forum threads
RDH4 Mirror Scanned version of Radiotron Designers Handbook 4th Edition (copyright expired)

Articles from the secret AX84 directors society. :)

The Beginning of AX84 From someone who didn't pay their studio rent to endless arguments about class of operation. How came to be...

Calculators and stuff...

Power Tube Bias Calculator A calculator for Power Tube Biasing (contributed by Bryan James)
RC Filter Calculator A calculator for RC Filters (contributed by Theodore)

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