On second thought (ok, I realized I was using the 100w slug in the Byrd and therefore reading the wrong scale), it seems to be running about 3w or just a hair more. Within spec to be sure, and I know there's no real world difference between 3 & 4 watts. I still wonder if there's any way to push it up just a hair more...
-- 73, Mike, KC0KBC Yaesu FT-857D, FT-8800R, VX-7RB Elecraft KX1 #1819 (in work), XG2 -------------- Original message ---------------------- From: [EMAIL PROTECTED] (Mike) > I'm finally getting back around to trying to finish my KX1, and now am > finding > that output power is a hair under 2w rather than the prescribed 3-4. > > I'm connected to a regulated power supply at 13.8vdc, output is through a > Byrd > wattmeter to an MFJ 50 ohm dummy load. R4 is fully clockwise. I'm also > using a > reference receiver (a Yaesu 857D with a 3' wire as a receive antenna). I > clearly hear the tuning tone in the 857 at both 20m and 40m, and output power > is > identical on both bands. Short keying bursts are nice and clear at the > reference receiver. An inline ammeter shows 0 amps both in receive and > transmit > (a bit odd, but I assume the current drawn is less than the minimum > detectable > by the meter). > > Don will remember that I had some trouble with the toroids on the 3080 board, > and rewound them. That seemed to fix the first problem I had, a deaf > receiver. > I've looked hard for a short on the LPF board but cannot find any, including > the > back side where L2-1 must clear the pad for L2-4. > > Working through the troubleshooting tables, I seem to have eliminated all the > easy things :-). One item is to re-check the resistance on the relays, > between > pins 1 & 8. I seem to remember seeing that resistance spec, but I can't find > it > now. If someone knows it, please pass it along. > > In looking at the relays, I noticed that the book calls for installing C56 > across pins 2 & 3 of K1. However, Figure 13 on page 34 appears to show C56 > across pins 6 & 7? Pin 1 has the tiny notch above it in the case, right? I > installed C56 just like is shown in Figure 13. I also noticed my C56 is a > disc, > not the tantalum or whatever is shown in the Figure. I didn't consider that > an > issue during assembly. > > On the plus side, nothing seems to be getting hot :-). > > -- > 73, > Mike, KC0KBC > Yaesu FT-857D, FT-8800R, VX-7RB > Elecraft KX1 #1819 (having its way with me), XG2 > _______________________________________________ > 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 _______________________________________________ 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
