Bob, First thing to look at is the power supply - Tap teh DISPLAY button and attempt to transmit at full power - if the voltage sags drastically, check the power supply, the connecting cable and the terminations for good connections, adequate cable size (16 gauge or larger).
If the voltage stays adequately high when transmitting, what is the current draw? Are you transmitting into a proper dummy load? The K2 will only produce full power output into a 50 ohm load. If all the above is OK, then look carefully at T1, T2 and T4 - are they wound with the correct number of turns and are the turns spacing like that indicated in the manual diagrams? If all that is OK, are those transformers connected properly to the board - leads in the correct holes, everything properly soldered? Check the Low Pass filter toroids for correct number of turns (count only the turns passing through the center of the core), chack the soldering of the toroid leads. If all the above passes muster, it is time to make some RF Voltage measurements to determine where the power is being limited. Build the RF Probe that is supplied with the K2 if you don't have one already (or use a 'scope to measure the RF Voltage). If you get to this point and it still doesn't work, send us another note and we will proceed from there. 73, Don W3FPR > -----Original Message----- > > I started to do the 40meter tx power test & when I set the > control for 2.0 watts, I get 2 watts out. When I set it for 5 > watts, I get 5 watts but can get any higher no matter if I set > the control to 10 or higher. I have the same issue on 80 meters. > I haven't tried it on any other band. > > Bob > WB8DDI > K2# 4998 _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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
