Don, Thank you for your guidance! It turned I had a short to ground at R88 and 2.7K resistor at R89 from the UN-PCB supplement. While I know it is common to place parts incorrectly, I was glad not to have made the mistake of simply not soldering something.
Again, thank you for the quick and very helpful "support", you are a tremendous asset to the community. 73, kc2vmp Rob Gault On Oct 29, 2013, at 6:45 PM, Don Wilhelm <[email protected]> wrote: > Rob, > > Look at the mixer carefully, especially the silkscreen outline on the board. > If it is installed backwards, the results will be much as you describe. > > If the mixer is installed correctly, then you may have to build up the > oscillator shown in Appendix A (or use a signal generator with much more > output than the XG1 or XG2 can provide) and do the Receiver Signal Tracing > steps shown in the manual Appendix A. > > 73, > Don W3FPR > > On 10/29/2013 6:30 PM, Rob Gault wrote: >> Initial receiver testing on 40 Meters (pg 67) can barely hear XG2/XG3 @ >> 50uV. I've injected the 50uV from the XG2 directly to the input of the >> rcv. mixer Z6 @ R73, no change. VFO Input to the receive mixer looks good >> on a scope, no IF signal to be found at pin 1 of J12. Q22 voltages >> nominal. >> >> I've eyeballed all solder connections and Caps and Resistors and confirmed >> values. >> >> We have confirmed the injection and testing procedure on a known good K2, >> lots of IF signal at J12 pin 1. >> >> Looks like Z6 is the problem? Any other ideas or thoughts? >> >> > ______________________________________________________________ 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
