Firstly, it's David, at least it was when I replied :) I go down to 3w for two reasons: 1) so I'm not tuning up over a SSB signal with 120W of carrier 2) so I don't strain the K3 components that back off with high SWR
3w appears to be min the SC-237 will tune on reliably. I can get it to tune on 2w sometimes, but that depends upon band. On 16/1/08 14:33, "G3SJJ" <[EMAIL PROTECTED]> sent: > Maxim, I'm not sure why you need to go down to 3w. The K3 will sit at > 120w for a long time. I don't need to use an ATU here as all my antennas > are fed with coax and remotely swiched, but I do have a manual tune amp. > I have a small printed card fixed with blue tack to the front panel > showing setting per band/mode. A bit like the old ad for Alpha amps, > Tuning By Numbers. 20m CW is 44 /36, so swopping bands is simple. Flick > the band change switch, quickly turn the two dials to those settings, > apply RF and do final fine tune. All done within a few seconds. The only > thing I have to watch is knock the power knob back on the MP to roughly > the area I know that gives me a reasonable ampount of power out of the > amp, say 30-50 watts. I would have thought this technique would have > been OK with the K3. > > Chris G3SJJ > >> Well, when you wish to go from 100w, down to 3w, in order to tune an >> external tuner (in my case an SGC auto-tuner), it can get tedious. >> >> On 16/1/08 13:48, "Joe-aa4nn" <[EMAIL PROTECTED]> sent: >> >> >>> Benny, it's just the turn of a pot! >>> How difficult or inconvenient could that be. hi >>> de Joe, aa4nn >>> >>> ----- Original Message ----- >>> From: "Benny Aumala" <[EMAIL PROTECTED]> >>> >>>> Maybe my interest to QRP is partially because K2. >>>> I want to use my K3/100 still quite a lot in QRP and QRPP. >>>> The degree of adjust is really fine down to 0.1W. >>>> Also, 100W PA switch-off below 10W is very clever. >>>> But to crank between 100 and 5W is not very handy. >>>> >>>> I would like to see PF1 to change powers between two adjustable levels. >>>> >>>> Benny oh9nb -- Any sufficiently advanced technology is indistinguishable from magic. -Arthur C Clarke, science fiction writer (1917- ) _______________________________________________ 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
