On Dec 25, 2009, at 2:14 PM, Mike Morrow wrote: > Seriously, though, I'll assume that you had to install the RF board J1 > connector as part of your KNB1 installation process. In other words, > the J1 connector was not in place earlier when your K1 was working.
This occurred to me on the way to a Christmas Eve party and I kept it in mind but took a some time off from the problem to enjoy Christmas. After carefully inspecting all the parts for bridges today, cleaning up a few flux spots, etc., and taking some high resolution photos with a macro lens and my D200 (ala QST) I thought I would have to go the RF probe route. I re-installed the KNB1 and KAT1 to wait for tomorrow. The football was so bad tonight, however, I decided to take another look and then build the RF probe in the manual in preparation. As I took the K1 apart again, I was placing the KAT1 back in it's bag (I like to keep the boards and all their parts in the original marked bags when not in the K1 itself), I noticed the jumper that I removed from the KFL1-4 when installing the KAT1 and immediately slumped in my chair. Sure enough, that was it. I had removed the KAT1 and moved the RF-DET jumper to K1, but I had not replaced the J2 jumper between pins 2 and 10! This jumper connects the antenna to the input of the low pass filters on the KFL1-4. When listening for a signal, it really helps to have some RF from the antenna going in to the receiver! Once installed, the N-GEN and X2 signals (even the 1uV signal) are loud and clear. Good thing, too, because I did something wrong with the probe and my DMM is not reading! Anyway, tomorrow I can thoroughly re-calibrate my K1; both RX and TX. Thanks for the ideas, Byron KI6NUL p.s. I am using Signal Scope on my iPod touch to monitor the waveforms. It seems to do a pretty good job. ______________________________________________________________ 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
