[Elecraft] K2 Microphone Suggestions?

[Phillip Shepard]

When I recently sent this message to the reflector and the originator (Jim
Brown), I got a message from Jim Brown titled Please Confirm You Message.
This says that I need to reply as part of a SPAM monitoring service.  What
is this?  Is it legit?

Phil, NS7P

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net]On Behalf Of Phillip Shepard
Sent: Wednesday, October 05, 2011 3:33 PM
To: jim at audiosystemsgroup.com; elecraft at mailman.qth.net
Subject: Re: [Elecraft] K2 Microphone Suggestions?


I needed a very lightweight hand mic for my SOTA activations.  I have a
number of hand and desk mics, but they all weighed too much to add them to
my backpack.  So, I took a small mic from a late-70s vintage Kenwood 2m rig
I had on the shelf, put a new connector (from Radio Shack) on it and gave it
a go.  This 500 ohm dynamic mic works well with my K2 and it's small and
light (about 1/4 lb).  It even got good audio reports from the audio
oriented gang on 14.178MHz.  Something like this may be a cheap and capable
solution for you.

73,

Phil, NS7P

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net]On Behalf Of Jim Brown
Sent: Wednesday, October 05, 2011 2:45 PM
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] K2 Microphone Suggestions?


On 10/5/2011 12:01 PM, David Elliott wrote:
> However, I would
> >  like a cheap, basic hand mic that would work for the occasional SSB
> >  rag chew or field op. Something really basic.

Not a hand mic, but the mic on the Yamaha CM500 headset would work VERY
well with a K2. The K2 is low on audio gain, and the CM500 is a pretty
hot mic, so it will compensate.

See http://audiosystemsgroup.com/HamInterfacing.pdf for guidance in
connecting it.  You will need to buy a mic plug, 1/8-in jack, and a
small resistor of 4.7K-6.8K to make a simple adapter.  You want to find
a resistor small enough to fit in the mic connector.  And you will need
to consult the K2 schematic to see which pin is audio in and which pin
is +8VDC.

Wiring is simple.  The mic connects between the audio input and the
chassis (shell). The resistor goes between the V+ pin and the audio
input.  The pdf tells you a part number for the 1/8-in jack and where to
buy it.

73, JimK9YC


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