[Milsurplus] SIMPLE Carbon Microphone Substitute.

[Dennis DuVall]

I forget, what’s the mike pushing in the BC-669, i.e., a pair of P-P grids directly through a transformer or is there an additional input amplifier stage?

Ran a -669 at Ft. MacArthur for several years but I don’t remember any mic problems…….

Dennis D.  W7QHO
Glendale, CA

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