Just finished building KX-1 #1207 with 30m board and ATU. Nice little rig!
After adjusting C9 on the KXAT-1 per the manual, I decided to compare the power output measurements obtained via the internal power sensor, a DL-1 dummy load + DMM, and using my OHR WM-2 QRP wattmeter. BTW, the supply voltage is 12.5v and I substituted a 33-ohm resistor for R30. Output before I changed R30 was about 1-watt lower across the board. Here are the final measurements, as built: Band DL-1+DMM Internal WM-2 20m 2.6 3 3.7 30m 3.7 4 4.7 40m 3.4 4.1 4.3 Which wattmeter should I believe? I tend to think the DL-1 plus my Fluke digital multimeter would give me the most accurate reading, but.... Also, no matter how I fiddle with the spacing on L3, 20m output is always 1-watt less than on 30 and 40m. I guess this is in line with what other folks have reported. tnx & 73, John Pfeifer - WL7M _______________________________________________ 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
