Expensive: 20 years ago when I started working with Knowles mic elements for Mil headsets they cost the firm GBP15 each in lots of 20k. One of the main criteria was reliability. I recall the output was 100mV with a standard close-coupled tone on the face of the capsule. The instruction to the squaddie was "kiss the mic" to get the right output. The noise environment was inside an APC etc and it was common for them to shout.
David G3UNA > On 21 March 2022 at 20:42 Tony <[email protected]> wrote: > > > Jim: > > > Close-talking" microphones are designed for use in very noisy > > environments, like military aircraft.They are not directional, rather > > they cancel all sounds more than an inch or two from their element. > > 73, Jim K9YC > > That seems to be the case with the Knowles HC-3. It would be great if > these elements could be modified to perform better. I've been searching > for a drop-in headset element that has the same sensitivity and response > curve as the original Heil HC-4 / HC-5 (see below). They have great > articulation and work well with rigs that don't have TX-EQ. Used HC-4/5 > elements are pricey! > > Tony > > . > > ______________________________________________________________ > 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]
