If you connected the +8V DC line from the SM-20 to pin 6 when you rewired it, you are getting bias. The K3 pin 6 power is present independent of the mic bias (pin 1 power) setting.
73, ... Joe, W4TV > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Barry Simpson > Sent: Tuesday, August 12, 2008 5:50 AM > To: 'Elecraft' > Subject: [Elecraft] K3 and SM20 > > > In readiness to use my new K3 I have rewired my Icom SM20 mic > to the K3 configuration. I was surprised to find that it > works exactly the same with the bias on or off. To ensure > that K3 FP mic bias is performing correctly I have also tried > out my new Elecraft Heil Proset. That works fine with the > bias on but not at all with the bias off which is what I would expect. > > > > I thought the SM20 required bias as it is an electret mic but > that does not appear to be the case. > > > > Has anyone got any experience of the SM20 with the K3 ? > > > > Barry Simpson VK2BJ > > _______________________________________________ > 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 _______________________________________________ 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
