First, check the number of turns on toroids L18, L19 and L20 in the low pass filter. I suspect they are OK, or you would have problems on 20 meters as well, but check anyway.
If this is a QRP K2, check the number of turns on T4. Normally the green wire is connected to the PA transistor collectors and has 2 turns while the white winding connects to the Low Pass Filter and has 3 turns. If you find only 2 turns on the side that connects to the LPF, then the prior owner had would it for "better efficiency at 5 watts" - but that also means poorer efficiency at higher power settings, and if the KSB2 is installed, that winding must be changed back to 3 turns to operate in a linear fashion. Then I need to ask exactly what you have, and how you are determining the power output? Specifically, do you have the KAT2 or KAT100 installed and do you have the KPA100. If this is a basic K2 with no tuner installed, the load must be a good 50 ohm non-reactive dummy load to achieve a good indication of power output during a TUNE operation. If you have the KAT2, KPA100, or KAT100, you must calibrate the wattmeter in those options before getting a good indication of power output. Let me know what you have and I should be able to help further. 73, Don W3FPR On 10/25/2010 8:22 PM, Shamrock wrote: > I bought a K2, sn 01489 on ebay. Had to replace the PA transistors and > drivers and R50. Upgraded the firmware. Anyway, on 30 meters, at 5watts, it > draws 1.56a. At 10 watts, 3.42a. Also a bit high, I think is 40 meters which > at 10 watts draws 2.46a, and 15 meters at 10 watts, 2.30a. The rest of the > bands range from 1.80a to 2.14a at 10 watts. This is into a dummy load. Any > suggestions would be appreciated. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
