Using a VFD as an Amplifier in a Primitive Radio Circuit

This is a short video demonstrating the use of a vacuum fluorescent display (VFD) as an amplifying device. The video shows the effects of varying plate voltages on the amplification produced by the VFD, using a simple crystal radio as the audio source. Schematics and additional details for both the radio and the amplifier can be found on my web site at: www.hpfriedrichs.com

• Category

  Science & Technology

[akkudakkupl]

Very nice idea :-) i must look for some VFD segments on electronics scrapyard :-) I must test this :-)

[Mark McGough]

The VFD has similar internal structures to a vacuum tube, with a plate (anode), combined filament & cathode, and grid. He's using the VFD as a vacuum tube amplifier. Pretty neat.

[Jo0ngle]

LOL, thats a funny way to use VFDs - pretty cool idea.

[smokyatgroups]

Is the display just in series with the audio source? Does the amplification come from negative resistance effect of gas plasma?

[douglas seidlitz]

Genius.

[john3kbs]

Rally cool!

[Ben Weaver]

Hey - good job. I'd never have thought of using them like that.