Enter the vacuum tube: the perfect symbol of technological obsolescence. Despite Chilton’s dramatic flair, however, vacuum tubes are among the least consequential parts of current weapons and have ...

The symbols and subcircuits folders are found ... (Wiley, New York, 1954), 881 pages. 4. Jacob Millman, Vacuum-tube and Semiconductor Electronics (McGraw-Hill, New York, 1958), 644 pages.

In Part 3 of this series, covering the simulation of vacuum tubes in SPICE, 7 we outlined the construction of a model for a VT triode―quite conveniently, the 12AX7. With the symbol(s ...