Jay - the Heil Proset (December, 2004) for the K2 that I have has an electret (condenser) microphone and therefore requires bias. It was furnished with the Heil adapter cable that has a "red" bead on it which, according to the instructions, "May be marked Kenwood" and came with the 5.6K resistor as well as 8 configuration jumper blocks. Newer ones may be different but I doubt it.
Neither the HC4 or HC5 cartridges require bias. They are not electrets. I have used all three with the K2 with great success and am currently using the Proset (with the electret) on my K3 - also with great success. Hope that helps. 73 es gud dxing -- Don N4HH K3 #83 <SNIP> Jay asked: Is there any difference between the K2 proset and the regular Heil proset (with either the HC4 or HC5)? Jay - KT5E _______________________________________________ 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

