[Elecraft] Replacement Hand Microphone

[Stuart Rohre]

You can either use a high impedance to low transformer for the D104 mike, or
get one of the D104 "amplified" mikes which has a impedance converting
transistor circuit in its base, able to drive low impedance modern
microphone inputs.

The crystal high impedance element of the 104 needs to look into a high
impedance to avoid altering the tone response.  It will sound good, if
properly terminated into the right circuit.

Stuart
K5KVH