Fred, It sounds like you are a good candidate for a KPA100 in an EC2 enclosure. If you also add the KAT100-2, the KPA100 plugs into the KAT100 board. Without the KAT100, you have to make a hole in the EC2 rear panel for a coax connector (KPA100 input) and make up a cable from the base K2 AUX I/O DE9 to the KPA100 AUX I/O DE9. Not difficult at all. It does require the KIO2 (or a substitute) in the base K2 - only 4 internal K2 signals are connected, no RS-232 signalling is involved on the path.
A tenfold increase in power is 10 dB - dB=10log(P2/P1). 73, Don W3FPR > -----Original Message----- > > My original inquiry concerned my options, with a > new K2 build - for adding some more power later down > the pike. I've always liked separate items; xcvr, > tuner, metering, and amplifiers. In some way - the > way I upgrade frequently - its easier with all the > pieces, for me to swap/sell out a single item > easier. And I'm just not nuts about adding a KPA100 > on top cover of my neat little QRP K2 rig. I'd guess > I want to give the K2 all the chance I can, with > having as little RF interaction with a large pcb > amplifier sitting 2" above the K2 plane. Having had > done hundreds, no thousands, of CAD runs on analog > circuits in my previous life - there are such things > as R/L/C/S/F interactions and optimums. Perhaps > the K2's digital makeup - helps this. > > I really don't understand all that is involved in > moving a KPA100 outside to a separate box. Looks like > my options are to build that new K2, and wait out the > vendors - impacted by the latest FCC rulings. I > understand there is a DB increase limit, over what the > base K2 outputs. Perhaps that will limit my external > choices. Does anyone know the DB > increase, from 10W PEP to 100W PEP? > > What is driving me is the chance, in the future, to > be able to swap out any item in the > xcvr/tuner/amp/antenna string. Affordably, or with > alternative backup items. > > Thanks, > Fred N3CSY > -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.432 / Virus Database: 268.15.27/602 - Release Date: 12/25/2006 10:19 AM _______________________________________________ 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
