You can order an Amp Keying partial kit from Elecraft for $5 - look for AMPKEYKIT at the Elecraft order page. The direct link to the circuit and other details is http://www.elecraft.com/Apps/Amp_keying_ckt.htm - no circuit boards are available, but it is easy to buiild on a piece of perfboard.
If you want something a bit more recent, go to Tom Hammond's website www.n0ss.net and look about 3/4 of the way down the page for 'K2 (BASIC) External T-R Relay Driver'. The KPA100 does have the Amp Keying for an external linear built into it. 73, Don W3FPR > -----Original Message----- > > Does any have a switching circuit for a K2 that will activate the > relay in an amplifier? My 11-year-old Kenwood is in for a repair, > and it may be a while before it's back in the shack. In the > meantime, I'm driving an Ameritron ALS-500M solid state amplifier > with 7 watts from my K2. > That works well but requires me to key the amp relay (I use a > pushbutton on a cord) as I key the K2 with the mic's PTT switch. > The voltage on the amp keying line is 10 V DC, and the current > when keying the amp is 120 mah. > Dave, W6KOW > K2 # 5120. Sometime in the six few months I'll build the K2 > 100-watt internal amp. _______________________________________________ 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
