[Elecraft] CM-500 dynamic mic vs electret

[Bill Frantz]

When teaching cave rescue communications, most of which uses 
wired military surplus field phones, we teach yelling into the 
ear piece if the microphone fails. Another example of a dynamic microphone.

73 Bill AE6JV

On 11/7/20 at 7:47 PM, ny9h at arrl.net (Bill Steffey NY9H) wrote:

>Many a speaker has been forced into service as a microphone, 
>and is a frequent design element as both in an intercom.

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