[Elecraft] K3 and Kenwood MC-50 mike

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Joe W4TV and Bob N6TV,

I have been following discussion on the Elecraft and Elecraft K4 groups 
about MC-50/MC-60A and dynamic mike bias off (not being off, at times).

I have been using a Kenwood MC-60A with my K4D, I plan on re-wiring my 
Heil GoldLine HC-4 taken from TenTec Orion II, and it looks like both 
mikes NEED the 1uf Tantalum Cap inline with the dynamic element as 
neither of those mikes have one.  I also need to research my Heil Elite 
Pro HC-6 dynamic as "I think" it may have one.

I have also "just" come to the understanding that MICBIAS and BIAS (pin 
6) are TWO different "things" (correct me if I am wrong - reason for 
schematic, below) As I can see MIKEBIAS goes to Mike Pin 1 (J2).

Thank you for pointing out that the Kenwood mike uses a different pin 
for the +8v bias (SO, Elecraft did not follow the Kenwood mike layout 
100%) ??

I enjoy ALL your comments and advise.

73, steve WB3LGC








On 4/9/22 09:57, Joe Subich, W4TV wrote:
> The MC50/MC50A/MC60A are a decent quality dynamic mic and a good
> match for the Elecraft transceivers.  With the MC50A/MC60A one can
> (should) turn off the preamp in the base unless the 8 pin output
> jack is modified to move the +8V input from pin 5 to pin 6.
>
>
> 73,
>
>    ... Joe, W4TV