[AMRadio] mike

Geoff w5omr at w5omr.shacknet.nu
Tue Mar 15 13:41:36 EST 2005

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,

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