With some assistance from Don, W3FPR, K2 # 7841 assembly has been completed successfully.
I found that the J310 FETs that came with the kit were slightly too slow to make the synthesizer operate. Apparently this is an issue with the latest batch of J310s. There's a couple of solutions for this: (1) install a 10 pF cap between the source and ground of Q19 or (2) use a different J310. I tried both solutions, they both worked. In the end I elected to source some J310s from kitsandparts.com which were an older vintage, and it worked fine without the extra capacitor. I also found that the trimmer caps for the 10m/12m bandpass filter (C44, C46) were very touchy; I thought for a while that 12 meter TX was not working, but I finally got them tuned up so that I had good output power on 12m. I built # 7006 about 9 years ago (which is still working well), and was really wanting to do another one, so I went ahead and ordered it while we still can. 73, David AJ4TF -- Sent from: http://elecraft.365791.n2.nabble.com/ ______________________________________________________________ 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]
