Hi there, After 100 % flawless work with the whole K2 journey, the KPA100 and all the add-on modules with bell's and whistles, it seems my turn has come now to have a build error on # 6936, or more specificly; the KPA-100:
When doing the 2nd alignment step of KPA100, I measure all the resistances OK but one; The cathode of D13 seems very low resistance to ground and not >10 kohms as expected. I measured some 6-7 ohms. The intial checkout in 1st alignment step round confirmed all diodes pass and having the expected forward and reverse voltages / resistances as expected, so I assume for now the Diodes are OK still. Now I may have myself an idea to the failure mode, but can any of you think of other (known) failure modes to this ? My assumption is that I have shorted out the two foil layers of capacitor C31; effectively putting both sides of C31 to ground - as I managed to nick the house of C31 with my auxillary 30W solder iron, when soldering the emitters of Q1 and Q2, and the plastic housing of C31 is now slightly open and the internal foil visible. ( and yes; I'm givin' myself a hard time and cursing my own lack of being careful :-) !! ) Any other bright ideas beyond the obvious C31 defect, hence replace ? 73' Brian OZ2BRN K2 # 6936 ______________________________________________________________ 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
