Alan, Additional information: The fact that it failed at one point earlier, and "fixed itself" for a while strongly suggests a bad solder connection in the PLL/VCO area. It works one time and not another is usually an intermittent solder connection problem.
73, Don W3FPR On 9/5/2011 8:40 PM, Alan Davenport wrote: > Hello, > > I have lost 80m receive on my K2 S/N:7012. I had this problem during the > build but it "fixed itself" by the time I sorted out some other problems. 80m > was working just fine for 6-7 months. The problem has returned. > > Injecting a signal starting at the antenna, I get nothing on either side of > K8, nothing if I inject at W1, and very weak signal if I inject at the output > of relay K2. Strangely, it will TRANSMIT on 80m with normal power levels but > it outputs a signal at approximately 3712 and that does not change when the > VFO is changed. The VFO digits change as expected as the dial is rotated. > > I re-soldered all connections for 80m from in the band pass and the low pass > filters. I temporarily removed the ATU to remove that from the equation with > no effect on the results. > > It seems significant to me that it will transmit and that the transmit > frequency is fixed at an incorrect value. Honestly though I am at a loss and > need some advice as to how to proceed. Any help will be greatly appreciated. > > 73 de Al, W2GZN > ______________________________________________________________ > 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
