[ARC5] Carbon cartridge replacement circuit

[Brian Clarke]

A carbon microphone is DEFINITELY NOT an amplifier. It is a variable
resistor.
73 de Brian, VK2GCE.

On  Friday, 28 April 2017 4:33 AM, Richard opined:

    An ohm meter reading won't tell you much. Both a dynamic or carbon mic
will have resistance of similar value.  Carbon microphones were used for
many decades because they are fairly simple to make but mainly because a
carbon microphone is also an amplifier so the mic has very high output and
does not need as much amplification as other types do. 
<snip>