To supplement Lee's email, I would say that ALC is a way to protect the PA from overdrive.
For example, if I set proper ALC level at my ICPW-1 to get only 500 watts (the full output of PW-1 is 1 kw), even when I turn the RF power control on my IC756pro2 to full scale, the ALC feedback voltage from PW-1 will automatically limit my pro2 to an output power of less than 30 watts. In the case of K2, the output power is less than 15 watts. I do not see any danger to overdrive a PA. Clearly, K2/100 is a different story. 73 Johnny Siu VR2XMC ----- Original Message ----- From: "Lee Buller" <[EMAIL PROTECTED]> To: "Mike W" <[EMAIL PROTECTED]> Cc: "Elecraft Reflector" <elecraft@mailman.qth.net> Sent: Friday, July 09, 2004 6:46 PM Subject: Re: [Elecraft] driving external PA with K2 > Mike, > > You already have all the info you need, but I would like to say you will need no ALC at all. If you keep the rig linear and not over drive the amp...there is no need for ALC. This feature is kind of a left over from when tubes were tubes and men were men (sorry Ladies, trying to make a bad pun) Of course, you will not over drive a typical amp with 15 watt of mighty mojo. Now, if you have a KPA100, that is a different story altogther, but I do not want to digress. The main point here is keep the rig linear and do not over drive the amp. > > Have fun building the keying interface. Works like a champ. > > Lee - K0WA _______________________________________________ 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
