[ARC5] Carbon cartridge replacement circuit

[Jack Antonio]

On 4/28/2017 1:14 PM, hwhall at compuserve.com wrote:

> First time I heard someone assert that a carbon mike was an amplifier, I
> thought "Whaaaaat???"  Until I thought of the mike button as the analog
> of a grid controlling a current flow.

Another device using carbon as a variable resistor is the carbon
pile regulator in radios such as the BC-966 IFF set, and the
power supplies for the SCR-522. I'd consider these as amplifiers
also.

I have thought that it might be fun to try and analyze one using
tube formulas.

Jack Antonio
WA7DIA