In message <[EMAIL PROTECTED]>, "John [K7SVV]"
<[EMAIL PROTECTED]> writes
On their Web page, Astatic does not give the value of the Base to
Collector
resistor value in the first stage of the the preamp but they do for the
same
resistor in the second stage. Have you any idea what it might be?
used (2N, etc).
>
> Ron AC7AC
>
>
>
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of W3FPR - Don Wilhelm
> Sent: Tuesday, September 27, 2005 5:13 PM
> To: [EMAIL PROTECTED]; elecraft@mailman.qth.net
> Subject: RE: [E
PM
To: [EMAIL PROTECTED]; elecraft@mailman.qth.net
Subject: RE: [Elecraft] D 104 mic with K2
The D 104 mic (unamplified version) needs to look into a very high impedance
(50k ohms or greater). That mic was developed in the days of vacuum tubes
with mic amplifier input inpedances in the 50k to 1
KI6WX
increased gain mod of the KSB2 - which is what I use).
73,
Don W3FPR
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] Behalf Of [EMAIL PROTECTED]
> Sent: Tuesday, September 27, 2005 7:39 PM
> To: elecraft@mailman.qth.net
> Subject: [Elec
I would like to try the D 104 Mic. (crystal element ) in the K2 . I
remember a circuit posted on the reflector on this , can anyone help ?
Thanks ,72, 73,
Jerry Uhte K9UT K2 # 1273
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