Frank, Unfortunately the Heil HC-4 and HC-5 elements have lower output than typical mics. There is one in the Handi-Mic set that should work well with the K2 - and that is the one for the Icom (Heil number HM-iC) perhaps you could arrange an exchange.
In general the Icom mics use an electret element with high output level - the audio input needs of the K2 and the Icom are similar. If you do wish to retain the HC-5 element, then your best choice is to use a pre-amp. There are work-arounds such as changing the value of KSB2 R14, but IMHO, the best all-around solution is to use a pre-amp and set the pre-amp gain to provide the output needed by the K2. If I recall correctly, the proper output level is -40 dBm. 73, Don W3FPR > -----Original Message----- > > I recently acquired a Heil Handi-Mic with the HC-5 element, > intending to use > it with a new K2 radio (#5510). I used straight-across wiring for the > configuration connector in the front panel since the Handi-Mic is > equipped > with a cable wired for Kenwood mikes. No resistor from pin 1 to > pin 6 since > the element is dynamic. The mike does work, but the output seems > low -- the > ALC indication barely lights the top bar, and the RF output > barely shows on > the louder peaks. A MH-2 mike shows a little more output, though > not that > much more. The over-all feeling is that the Handi-Mic has a > relatively low > output level and may need a preamp to work properly with the K2. > -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.430 / Virus Database: 268.15.6/567 - Release Date: 12/4/2006 7:18 AM _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
