Microphone Impedence

[SCN User]

>
>After reading our recent discussion on microphone impedences, I have a
>question regarding gain and Hi-Z mikes.
>
>I have an SBE-34 that runs full output power when tuning it up, but when
>you speak into the microphone and talk normally the power output is way
>down from max, even when the mike gain is all of the way up.
>
>The manual for the SBE says that it wants a medium to high impedence mike.
>The manual refers to a shure model 90B microphone as an example. I am using
>an old Yaesu mike that is marked as having 500 ohms impedence.
>
>Is this high, medium or low? Do you think that changing the microphone
>would give me all of the talk power that I should have?
>
>As a dedicated CW guy, SSB is new to me and I am unfamiliar with the
>operating conditions of SSB radios.
>
>Thanks for the help,
>
>Adam
---------------

Adam,

In microphones any impedance under say 1000 ohms is considered LOW impedance.

exactly where the crossover is, likely is something for debate. Hi impedance

is going to usually be something on the order of 10,000 to 250,000 ohms.

73 Pat  K7YIR  Seattle

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