I can’t imagine that paralleling four elements would make a big difference. It would be more directional at higher frequencies. A 2x2 array would be about 20mm across, which is one wavelength at 17000Hz. That would start to be directional, because angled waves would cancel out.
wunder K6WRU CM87wj http://observer.wunderwood.org/ On Jan 23, 2015, at 4:50 PM, Gary - NC3Z <[email protected]> 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 >>> >>> ************************************************ >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[email protected] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to [email protected] > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
