[Elecraft] Re: Mics for K3

[Joe Subich, W4TV]

> You may be able to hook them up through a matching 
> transformer however.

You could also use a simple one or two FET/Transistor 
preamplifier/buffer powered by the electret bias.  There 
are several such circuits floating around for the D-104. 
They would require only minor modifications to use bias 
on the mic lead instead of a separate wire or battery. 

73, 

   ... Joe, W4TV 
 



> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net 
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Robert C.Abell
> Sent: Wednesday, January 30, 2008 12:11 PM
> To: tubestuff at comcast.net
> Cc: elecraft at mailman.qth.net
> Subject: [Elecraft] Re: Mics for K3
> 
> 
> Attn. DW Holtman,
> 
> I too have and use the Astatic 7077 mic for my Drake TR-7 and 
> have a D-104 for my 
> Collins KWM-2A. I doubt that they will work with an Elecraft 
> K3. They are high impedence
> mics and the K3 would need a low impedence mic.
> You may be able to hook them up through a matching 
> transformer however.
> IMHO.
> 
> 73, Bob  VE3XM
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