I made that exact same mistake!!! When it came time to install R10, however, I realized the through-hole should not be occupied, and I discovered my mistake.
I have not gotten so far along as to test my SSB adapter yet, and I am glad I found this before I got that far. It's strange that we both made exactly the same mistake. Perhaps the markings there could be improved or a note in the assembly manual... De N3WZ - Jim > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:elecraft- > [EMAIL PROTECTED] On Behalf Of Marinos Markomanolakis, M.D. > Sent: Tuesday, December 28, 2004 7:50 PM > To: [email protected] > Subject: [Elecraft] SSB TX signal mystery SOLVED !!! > > First let me thank Don (w3fpr) and Garry (ab7my) for their excellent > support > and guidance for the resolution of this problem. > As posted earlier, I had a disappearance of my Tx SSB signal after > installing the adaptor to the K2 with normal RX and normal CW Tx. Had > spent > some hours looking at the different boards without finding the culprit and > finally started chasing the SSB signal with the oscilloscope to see where > it > was blocked. > That signal was going fine all the way past the crystal filter, exiting > the > C5 cap after the T1 transformer but then could not be found at the cathode > of D14 !!!! > That's very strange indeed I thought, since the C5 is supposed to be > connected to the cathode of D14 ?!?!? > And here came the realization that I had done the STUPID mistake of > installing the D14 cathode 90deg away from its normal pad, to a similar > pad > reserved for the R10.....Of course, at a later construction step I had > realized that one of the R10 pads was occupied, but I thought it was > normal > and had soldered it there anyway (another stupidity). > > Anyway, I can go on and on about how this should never had happened, but > it > only took a 90deg rotation of this diode without even removing it from the > board to fix this. > Now I have full SSB output and are 1/2 way done with my K2 100W amplifier > board before I have everything up and running. > Already built the NB, AF filter and successfully passed the first > alignment > test of the 100W board.... > > The above story is a good example of what happens when you stay up too > many > hours building your K2. But as you know, when you start you can not easily > contain yourself from continuing building. It is addictive !!! > > 73 to all, > Marinos, ki4gin > > > _______________________________________________ > Elecraft mailing list > Post to: [email protected] > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
