MH2 Info/Schematic

[Ben Hofmann K1NT]

I have an MH-2 microphone for use with my K2.  I can't
find the paperwork that originally came with it.

I am wanting to use 2 pins on the mic connector for
fixed level and variable level receive audio.  Was
thinking of two of pins 3, 4 or 5, but I wanted to
make sure before I did it that hooking the MH-2 to the
connector with signals on any of these 3 pins would
damage the MH-2 any way.  Any help would be
appreciated.

-Ben  K1NT


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[Don Wilhelm-3]

Ben,

The MH2 that I have makes hot connections only to pins 1 and 2 and
ground on pins 7 and 8, so you can use any of pins 3, 4, 5, or 6.  If
you have wired the resistor to mic jack pins 6 and 1, then pin 6 is not
usable unless you modify the 5 volt take-off point on the front panel board.

So the short answer is: In a normal K2 wired for the Elecraft MH2, you
can freely use mic jack pins 3, 4, and 5 (remember to remove the jumpers
for those pins from the mic configuration header so you don't feed
anything back into the K2 circuits).

73,
Don W3FPR

Ben Hofmann K1NT wrote:

> I have an MH-2 microphone for use with my K2.  I can't
> find the paperwork that originally came with it.
>
> I am wanting to use 2 pins on the mic connector for
> fixed level and variable level receive audio.  Was
> thinking of two of pins 3, 4 or 5, but I wanted to
> make sure before I did it that hooking the MH-2 to the
> connector with signals on any of these 3 pins would
> damage the MH-2 any way.  Any help would be
> appreciated.
>
> -Ben  K1NT
>
>
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
>  http://mailman.qth.net/mailman/listinfo/elecraft   
>
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>

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