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 wir
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 shap
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
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
box
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 wrote:
>
> On Mon, Jan 27, 2014 at 5:29 PM, Don Wilhelm wrote:
>
> The D-104 is still a great microphone when adapted to modern
On Mon, Jan 27, 2014 at 5:29 PM, Don Wilhelm 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 K3. I
have used my cl
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
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 t
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