[AMRadio] mike

[Geoff]

StephenTetorka at cs.com wrote:

>I appreciate all your time and help, guys.
>
>Excuse me for not mentioning the cathode resistor for bias.
>
>>From what little I have found...both the Collins 310A exciter and WRL Globe King 275 use a 6SJ7 for mike input...in which case, a hi-Z dynamic should work.
>
>So...back to square #1 - what is "hi"?
>  
>

a hiGH Impedance miCrophone is around 50+kohms. 

>Mouser has cheap ( $4 ) crystal elements whose impedance range is from 9K to 25K which doesn't look "hi" to me.
>  
>

The only way to find out for sure if it will work, or not, is to -try- 
it :-)

Nothing ventured, nothing gained.

73 = Best Regards,
-Geoff/W5OMR