Did you use the K3's MENU:MIC SEL option to choose high gain for the
microphone input?
It sounds like the element is good, but they were designed for very high
impedance inputs. A very simple one-transistor amplifier would fix that and
provide a better impedance match for modern rigs. Indeed,
Did you use the K3's MENU:MIC SEL option to choose high gain for the
microphone input?
Good advice from Ron. After checking that, and assuming the mic is
relatively old and its past quality-of-life unknown, I would consider
replacing the D-104's mic element with a similar crystal element
I tried a non amplified D104 and it was not good at all. The audio was real
low when the mike was at 60. It had a slight fan noise and I had no fans
running. The mic was wired up right because when I put it back on my ADI
radio it worked well. My ADI radio hand mic works on my K3. ADI and
The non-amplified D-104 microphone is a great one for frequency response
*if* it is working into a very high impedance (50k to 2 megohms).
Unfortunately, the input impedance of the K3 and most other modern
transceivers is in the vicinityof 600 ohms, so the D-104 will sound
very bad when used
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