Brian, I think you are in for some Transmit Signal Tracing. If you do not have a 'scope with a 10X probe or an RF Probe already, build up the RF Probe included with your K2 kit. Then turn to Appendix E in the manual and follow the procedure for Transmit Signal Tracing. Note that the steps on page 14, the "expected" values are shown for a properly working K2 at 5 watts. The RF Voltages that you should see will be higher - up to the point of the failing stage where it will drop lower. You are looking for that first point where the RF voltage is lower than the expected value.
73, Don W3FPR Brian Denley wrote: > I have completed the last assembly steps leading to Alignment and Test Part > 3 and started the testing. Everything went OK until I keyed the transmitter > (using TUNE) at 2 watts. The most power I can get on the internal power > meter is .5 watts. I do see the current draw rise to about 0.44 amps (from > 0.22). Adjusting L1,L2 have no effect so there must be a problem in the RF > circuit somewhere. The receiver stil works fine. I looked at T1-T4 but I > don't see anything wrong with the windings. Anyone know what the most > probable causes are to start my troubleshooting phase? BTW I used a 50 ohm > dummy load rated at 50 watts. I will admit that installing T4 links was > extremely difficult due to the closeness of other components. > Thanks > Brian Denley > http://home.comcast.net/~b.denley/index.html > > ______________________________________________________________ > 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 > > ______________________________________________________________ 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
