> I was under the impression that the K3 was wired the same as > Kenwoods for microphone usage. However, In checking the Heil > website, and the subsequent link for mike connections, they > show that pin 5 is 8 V., whereas the K3 manual shows that pin > 6 should have 8 V.
Correct, I had not noticed the error but just compared the Elecraft FAQ vs. the TS-2000 manual and Elecraft show pin 6 for bias and pin 5 as "Func" while the TS-2000 manual shows pin 5 for bias and pin 6 as "NC." This means that a Kenwood electret mic will not work with the K3 unless the microphone is modified. > I'm also curious why my Heil Pro Set headphones seem to have > low output compared to other headphones on various rigs that > I own. Anybody know what the impedence is for the headphones? The original ProSet had 200 Ohm earphone drivers. A modification replaced those with 32 Ohm units (I think). The "low output" is due to the reduced output of most amplifiers when driving high impedance loads - Yaesu even includes 10 Ohm resistors in series with the headphones to prevent excess volume in the headphones! Of course, the higher impedance headphones (and series resistance) helps cut down the hum, hiss and distortion. 73, ... Joe, W4TV _______________________________________________ Elecraft mailing list Post to: [email protected] 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
