Others have commented on the directivity problems with paralleling
microphone elements.
Regarding the "gain" that you mentioned, any electret element is going
to have a very high output. Much more than the K3 needs. The K3 can
effectively handle just about any microphone.
On 1/23/2015 6:50 PM, Gary - NC3Z wrote:
Provides more gain and improves the SNR.
Gary Mitchelson
NC3Z Davidsonville, MD FM18
NC3Z/4 Pamlico County, NC FM15
www.mitchelson.org
On 1/23/2015 7:33 PM, Gary K9GS wrote:
Just curious...what is the point of paralleling 4 microphone elements?
On 1/22/2015 10:44 AM, Gary - NC3Z wrote:
I wanted a desk mic to go along with my KX3 station. Wanted
something more portable than the Heil boom and mic I use on my
other radio. I have experimented with dynamic mics on the KX3 and
didn't get the results I liked but did get very nice results with
using 4 CUI electret condenser mic elements in parallel. I used the
CUI CMA-4544PF-W from Digikey and used a small project circuit
board to physically arrange them in a 2 x 2 config. Then I trimmed
up the board.
For the mic body I found a unused Shure 522 on ebay (some company
had them for a conference table system and had a great price). The
522 has an adjustable neck height and a PTT (with lock). I gutted
the body and fitted the new electret element assembly as well as
used a 3' TRRS patch cable that I cut 1 end off for the mic cable,
it also had 90 deg ends.
I am pleased with the physical results as well as very good audio
reports I am receiving from the regulars that know my signal, still
not to the level of my FTDX5000MP but getting better with each
tweak and DSP update (using 1.32 which has made a noticeable
improvement). I am using a healthy level of compression and mic
gain that shows a solid 5 bars.
--
73,
Gary K9GS
Greater Milwaukee DX Association: http://www.gmdxa.org
Society of Midwest Contesters: http://www.w9smc.com
CW Ops #1032 http://www.cwops.org
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--
73,
Gary K9GS
Greater Milwaukee DX Association: http://www.gmdxa.org
Society of Midwest Contesters: http://www.w9smc.com
CW Ops #1032 http://www.cwops.org
************************************************
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