On 07/04/2023 23:48, elecraft-requ...@mailman.qth.net wrote:
I'd like to connect a sound card output to a K2 mic connection. Does
this bias resistor need to be removed when I connect the sound card
output?
Electret microphones, like the MH2, MH3, MH4 require a bias voltage to
function. On the K2, this is done by "adding a 5K6 resistor between pin
1 and 6". That also works on the K3, but the K3 also has an option in
the menu to set enable a bias resistor in the rig - if you do that, you
don't need the physical resistor but you need to remember to do the setting.
Personally, I worry about the chance of doing this wrong (either bias
for a soundcard or a dynamic microphone, or forgetting the bias on an
electret) and hence said 5K6 bias resistor is in the microphone plug. If
I plug in an electret microphone, it will get bias, if I plug on
something else, I don't need to worry, and this will work on K2 and K3,
w/o any menu setting changes.
Geert Jan
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