Thanks Don, I already knew the basics of a resistor between pin 1 and 6
from a simple google search, but I suspected there was more to the story
with the Radiosport headset. And there is.
After conferring with Dave, WI6R and super helpful owner, there is
already a resistor inside the CS6-ELK cable and two dip switches to
control whether to provide bias to the mic element. Some blocking and
filtering is also part of the circuit.
The only thing I needed to do to the radio was to wire wrap from pin 6
to pin 5 on the K2 mic header to provide 5V at the mic jack pin 5 in the
fashion of a Kenwood radio. Pin 6 was not connected at the mic jack. The
CS6-ELK cable needs the provided bias to act like a Kenwood, not a K2.
Then set the DIP switches and it works great. Now 1 cable and 1 mic
element for both the K2 and K3!
I've copied the circuit image inline, I just don't know if the reflector
filters them out. If so, be happy to email it direct.
Yet another reason why the RS headsets are so darn good and well thought
out.
73,
Steve
W1SRD
On 7/26/2020 4:39 PM, Don Wilhelm wrote:
> Steve,
>
> I am not familiar with that particular mic element, but --
>
> If that is a dynamic mic element, no resistor should be used.
> If it is an electret type, the normal 5.6k resistor should work fine,
> it is not critical - anything between 5.6k and 10k will do fine.
>
> 73,
> Don W3FPR
>
> On 7/26/2020 7:01 PM, Steve Dyer W1SRD via Elecraft wrote:
>> Is anyone using this mic element with the K2? If so, what size
>> resistor did you use between MIC pin 1 and 6?
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