Richardson Electronics has announced the availability of the latest edition of the Care & Feeding of Power Grid Tubes handbook for all of its customers free from stock. The handbook, published by the ...
Fig. 1: The Eimac 4CX300A tube, used in a number of transmitters made in the 1970s and ’80s, has been discontinued. (Image courtesy Roy J. Tellason) Time marches on. The most recent casualty it has ...
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