Dale,
You will have to be more specific - there are several types of D-104
microphones.
The original crystal element which is very high impedance and will not
work well directly with modern transceivers with a nominal 600 ohm input
impedance.
Then there was the ceramic element which has a high impedance and is
similar to the crystal element.
Then with the advent of CB, the amplified D-104 came into being. That
microphone can be used on modern transceivers, but be careful with the
gain setting so you don't sound like the audio overdriving CBer with a
lot of distortion.
If you have either the crystal or ceramic element D-104, I can send you
a schematic for an FET buffer amplifier that works quite well with the
K2 or K3. Send me a private email since the reflector does not accept
attachments.
I am a bit confused by your question about the PTT. The normal D-104
G-stand has a bar which activates PTT when you grip it. There is a
sliding "bit of metal" that can be moved up on that bar to keep it
locked in. There are other D-104 stands that have some bars on the
base which can provide PTT, but I have not investigated those.
As for the colors of the wires, I do not recall. I suggest you do a
Google search to find the colors for your specific D-104 microphone.
You might find some relevant information at
http://homepage.ntlworld.com/rg4wpw/d104.html, but that is for the
amplified version. I believe the colors from the non-amplified head are
the same as those shown as inputs to the amplifier.
The D-104 is still a great microphone when adapted to modern low
impedance rigs. I personally use a classic with the G-stand and the FET
in the base of the microphone.
73,
Don W3FPR
On 1/27/2014 8:01 PM, Dale Gray wrote:
All,
I recently was given an Astatic D-104 mic. I have not opened the mic yet and it
has been modified with a ptt switch. I assume to lock the mic in transmit
without holding the grip.
I have the pin out for the K3 connector but I was wondering if anyone has used
this mic. If so, what were the wire colors to the 8 pin K3 connector.
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