[Elecraft] Bias Resistor for microphone

[kruegerbenny]

Hello,

a friend of mine gave me an old microphone from Philips (serial no. :
C944685 ; part no. : 3513 505 00692) which I want to use with my K2
transceiver. The friend said that it should be an electret microphone, so it
will need a bias voltage (he said 12V, but I found in the KSB2 manual that
some mic's work well with only 5V). It is also written that some mic's need
a bias resistor between AF and 5V. 
Is there someone who has a manual to the described mic or an idea how I can
find out how to connect the mic.

Thx for your help

77
Benny
DL8NWO http://elecraft.365791.n2.nabble.com/file/n6954471/IMAG0168.jpg 

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