Hello All: My first time to post to this list. I am building KX1 S/N 2825 and have progressed to page 43 Alignment and Test Part 2 with no problems. I have completed tests through page 44-keyer. I have not been able to proceed to the Receiver Alignment section, page 45, because I can not discern any signal from the DDS VFO, so not able to hear any signals, on either 20m or 40m. My question is this: should I be able to see the VFO signal at pin 19 of U2? I am using an old TEK 422 scope with 10 x probe. I see nothing at pin 19 or at pin 3 of Z2 the 50 mhz clock. At pin 3 of Z2, clock output, I measure gnd (with power off, of course). I also measure gnd at pin 4 of Z2, but also see 2.7 vdc when the unit is powered up. No VFO or MCLK signals are visible. This is confusing(!)
I’m kinda stymied at this point, and any suggestions are welcome! Should I be able to hear the VFO signal on an outboard receiver? Should I be able to see the VFO signal at some point, and where is the best measurement point? Another note: I am using the directions from Don Wilhelm’s letter of 4 May, 2011 regarding replacement of components for KXB3080 option prior to installing the option. This includes C27,C26,C1,T2. He will know what I am referring to. Sorry to run on for so long. Any help or suggestions, please? Thanks for the bandwidth. 73 Ron Dickerson WA7BME ______________________________________________________________ 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 Message delivered to [email protected]
