Of course the K2 includes a microphone input level attenuator selected via the MENU. I believe it's 10 dB as supplied. The resistor values can be changed for a higher value, if needed.
Ron AC7AC -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ken Rice Sent: Sunday, February 25, 2007 10:05 AM To: [email protected] Subject: Re: [Elecraft] Dave Clark Microphone As others have mentioned, the M-7A electret's output will be too high for good performance on the K2 (400mV RMS ±6dB into 150 ohm load @ 1kHz for 114dB SPL input), so you'll need to pad it down. And you'll need a series 1uF capacitor (again, as others have mentioned). Jim, W6JVE, uses an aviation headset on the K2 with the Radio Shack 1000:8 ohm transformer: http://www.ac6rm.net/mailarchive/html/elecraft-list/2003-02/msg00306.html If you don't care about keeping the Clark headset in stock form, you can replace the M-7A element with the three-dollar Radio Shack electret element that will work with the DC voltage and expected mic output level at the K2's mic jack. http://www.ac6rm.net/mailarchive/html/elecraft-list/2004-01/msg00197.html Please let us know how it works out. _______________________________________________ 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 _______________________________________________ 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
