Re: $5 DIY Tube Condenser Microphone!!!
This schematic is based on a design by NAIANT. See:
See an updated schematic at the above link.
NAIANT has discontinued making this model (November 2007)
That particular NAIANT microphone motivated me to design
the "Frankentube" DIY microphone.
(Look in the Files and Photos section for the Zapnspark folders)
The "Frankentube" is a considerably more complicated design.
--- In micbuilders@..., "handprintsoncavewalls"