"Harry Leiser" ) writes:
Does anybody know if the Astatic D-104 will work with an old Drake T4X-C?
What are your thoughts on amplified vs. unamplified D-104 for this use.
Thanks, K1HL


The issue is whether the microphone output impedance matches the rig's
input impedance. The D-104 is high impedance, it had a crystal cartridge
though I don't know if that changed with time; I don't know what the input
of the Drake is.

A lot of those built in preamps were about adapting to different rigs.
If the rig has low(er) impedance, then a single transistor is one
way to give the microphone a high impedance load while a low impedance
output for the rig.

If you simply load down a high impedance microphone, you'll end
up little output and a distorted frequency response.

Michael VE2BVW