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Vacuum Fluorescent Display Amplifiers For Primitive Radio
H.P. Friedrichs (AC7ZL) made this audio amplifier by using a VFD as a triode. A neat idea I've seen on hackaday a few times. Some characteristic curves are provided at the end of the article.Sat 16 Jun 2018 11:27:43 AM MDT - permalink -- http://www.hpfriedrichs.com/radioroom/vfd/rr-vfd.htm