Don: Thanks for the advice. I do have a Tek 2225 with 10x probes so I will start with that. I wasn't aware that they would be acceptable as RF probes. I might just start on page 10 and go through everything. Thanks again for the help! Brian http://home.comcast.net/~b.denley/index.html
----- Original Message ----- From: "Don Wilhelm" <[email protected]> To: "Brian Denley" <[email protected]> Cc: "Elecraft Reflector" <[email protected]> Sent: Saturday, August 21, 2010 8:41 AM Subject: Re: [Elecraft] [K2] No power on transmit > 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
