> Okay, so then did voltage (and amp) readings using the K3 > itself. Watts are also read from the K3. > > Receive: 13.6 / 0.75
13.6 is a little low. I would touch up the trimmer on the regulator to make the voltage 13.9 or 14.0 on receive. The K3 and particularly any accessory connected to the +12V jack will be much happier. > 10 / 13.1 / 3.61 > 12 / 13.1 / 3.88 > 13 / 13.3 / 7.48 (KPA kicks in) > 20 / 13.3 / 8.64 Note the voltage comes back up when the KPA kicks in (the current through Q2 drops from about 3.8A to around 2.3A). All of these track what I have been seeing. 73, ... Joe, W4TV > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of DOUGLAS ZWIEBEL > Sent: Sunday, December 21, 2008 1:53 PM > To: Elecraft Reflector > Subject: [Elecraft] K3: power out & V, A readings > > > Well, prompted by the interesting discourse here, I decided > to ignore my bulk and get on the floor to make some > measurements at the PS (RS35A). > > K3 on Receive: 13.60 volts > K3 at 120 watts output: 13.59 volts > > Hmmmm. > > Okay, so then did voltage (and amp) readings using the K3 > itself. Watts are also read from the K3. > > Receive: 13.6 / 0.75 > > Xmit : > watts output / voltage / amps (xmit is CW, key down) > 0.0 / 13.4 / 1.75 > 1.0 / 13.4 / 2.14 > 2.0 / 13.4 / 2.49 > 3.0 / 13.3 / 2.66 > 4.0 / 13.3 / 2.84 > 5.0 / 13.3 / 2.96 > 10 / 13.1 / 3.61 > 12 / 13.1 / 3.88 > 13 / 13.3 / 7.48 (KPA kicks in) > 20 / 13.3 / 8.64 > 30 / 13.2 / 10.21 > 40 / 13.2 / 11.38 > 50 / 13.1 / 12.45 > 60 / 13.1 / 13.20 > 70 / 13.1 / 14.07 > 80 / 13.1 / 14.83 > 90 / 13.1 / 15.64 > 100 / 13.0 / 16.40 > 110 / 13.0 / 16.97 > 120 / 12.9 flickering to 13.0 / 17.66 > > Well, the Astron appears to be VFB after about 3 decades of > service. :-) > > So...do these numbers tell us anything? > > de Doug KR2Q _______________________________________________ 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
