I am currently in the middle of converting a D-104 Eagle into a usable mic
and have had a bit of experience in the past with them. I am trying to
recapture a bit of the nostalgia from my early ham days. I paid too much
for it, but not only is the chrome flawless, but it came with the original
The easiest way to use an unamplified D-104 with the K3, or replace a
bad/noisy transistor preamp is this single FET circuit from W9AC:
http://72.52.250.47/images/D104.pdf
The single FET is uniquely suited for the high impedance crystal
element and bias on the mic power. When handled properly
D-104 microphones with the amplifier in the base work just fine with
modern rigs. Look at the bottom of the microphone - if it has a hole
with an adjustable potentiometer below the hole, it has the amplifier.
The Heil rebuild kit is not needed unless the mic element is bad. The
frequency
I might add that if one has an amplified D-104, but wants to remove the
dependency on the battery in the base, that single FET addition can
replace the amplifier in the mic. Yes, I have done that in one of my
D-104 mics. It also works for the K2 when the microphone configuration
header is
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
On Mon, Jan 27, 2014 at 5:29 PM, Don Wilhelm w3...@embarqmail.com wrote:
The D-104 is still a great microphone when adapted to modern low impedance
rigs.
Each time this subject comes up, I say the same thing, and it is true.
Old D-104s, crystal or cermanic, do not need any adaptation to the
My favorite is the D-104 base with the Astatic 10-DA dynamic head. Sounds very
nice.
Brian KB1VBF
Sent from my iPad
On Jan 28, 2014, at 12:49 AM, Hank Garretson w...@arrl.net wrote:
On Mon, Jan 27, 2014 at 5:29 PM, Don Wilhelm w3...@embarqmail.com wrote:
The D-104 is still a great
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