[Elecraft] K2 and K3 Microphone Input Impedance

[John]

Rest assured George, the mic input Z is not a rig selection criteria for
me.  This is for a completely different item I am developing to adapt my
mics to various rigs including the K2 and K3.

John

On 1/6/2011 5:55 PM, George & Jan wrote:
> John,
> I would not select a radio on the input impedance of the microphone input!
> It is not critical at all - should be at least 10 times the microphone 
> impedance.
> 
> Pro-Audio from as far back as the antique Western Electric unbalanced 
> systems of the 40s tend to be in the range of 1 k to 10 k. Mostly depends on 
> what the designer wants to emphasize. Lower would tend to reduce noise 
> pick-up. Higher would tend to load the mic less thus improving S/N. Probably 
> neither value is significant.
> 
> George
> AI4VZ
> 
> -----Original Message----- 
> Was there a compelling reason for having different termination values, 10k
> vs. 1k, between transceiver model lines?
> 
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