[Elecraft] K3: ModMic boom mic

[Edward R Cole]

Quick report on AntlionAudio ModMic:

I bought model 5 which has both omni and cardiod pattern mic 
elements.  After a little K3 Manual study: page 55 for MIC SEL options
I chose to try using the 3.5mm rear mic jack; ModMic comes with 
stereo 3.5mm so questioned if it would work in mono jack.
tip = cardiod element
ring = omni element
base ring = ground

I checked on-line to find that both require 1-10v bias so 8v bias 
from K3 works great
MIC SEL: rP.L biAS
tap 2 to toggle bias on
tap1 was left in Low

How to key radio:  rear PTT IN (female RCA-Phono) not in use with my radio
Alt key;  My Heil CM10 desk mic has a breakout with 1/4-inch phono 
receptacle for a foot switch - used that (works whether front or rear 
mic selected)

So I key the radio, observe ALC and RF power on a Bird and va la 
there is modulation.  Level is higher with omni element selected.
No "on-air" quality test at this point.

I attached the boom mic to my "old trusty" SONY MDR-V600 stereo 
headset.  Neat part is boom is held with a strong miniature magnet so 
easy to remove mic and store In nice foam zippered case supplied with 
the ModMic.  Also has mic mute button and extension cord, spare 
stickered bases and cable clips.

Next to test with KX3 (I will need four ring wye to two 3.5mm jacks 
extension - I believe obtainable from Elecraft).

PS: CM-500 still in transit

73, Ed - KL7UW
   http://www.kl7uw.com
Dubus-NA Business mail:
   dubususa at gmail.com