Diodes (was 'Re[2]: [HBR] HBR -- Part 8')

[Walt Hutchens]

Garey said:
> There is a phenomenon in vacuum tubes whereby the heater (filament) and
> cathode of the tube form a "parasitic diode". One side of the filament 
> is grounded, and so on negative half-cycles of the filament supply, 
> rectified 60 Hz pulses are superimposed on the cathode, resulting in hum 
> in the audio.

I should have waited a few more minutes before trying to answer this!
Thanks, Garey.

Walt
KJ4KV