Al, Try it with regular keying - say a string of dots. The LED bargraph is a good indicator of the instantaneous power output up to 10 watts - 1 bar per watt.
The power control is intentionally more "sluggish" in TUNE than in normal keying as an assist to those who use a manual tuner. The resolution on the 8 bit DAC controlling the VPWR level will produce about a +/- 0.5 watt variation from the power level that is set. Moving the power control during a TUNE may produce some slightly erratic power level changes because there is a lot going on when you turn that knob. What I am suggesting is that there may be no problem at all - check with normal CW keying. 73, Don W3FPR On 6/27/2011 4:05 AM, Alastair Couper wrote: > I have a base K2 sn 1056, with a to b mods, including cw shaping mod, and > the latest firmware. I have removed all options to ease troubleshooting. > Turning the power control gives erratic power output, varying widely and > randomly as I turn the control. If I turn the power control to max, then > power is also max, but other positions are random. This happens on all > bands, into 50 ohm load, and also using the antenna tuner option. Max > power out is normal at about 15w, more or less. The rig works in all other > aspects. Power supply shows 13.0 to 13.5 while transmitting. > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
