Everything for Electronics

Bob Armstrong

Bob's Articles

Vacuum Tubes for the 21st Century
November 2006
Hard as it may be to believe, there are still some applications today where a vacuum tube is a better choice than a transistor, and even a few applications where transistors simply aren’t an option and a tube is the only choice available.

The Stereo 6T9
August 2004
Building a Vacuum Tube Amplifier

Power Line Frequency Monitor
October 2006
The frequency of the power coming into your house is 60 Hz, right? (at least it is in the US). Everybody knows that right? On a mailing list that I read regularly, there was recently a long, heated discussion about frequency stability of the AC power that's in our houses...

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