Yes, sorry, C180, not C120. Not that I'm complaining, its absence made assembly easier.
Re: TO-220. If you look at Fig 24 (bottom of p28) in the instructions, you'll see TO-220 "leaning back" inwards from the side of the case, loosely held by the nylon screw. My TO-220 looked like that before I inserted the module -- so far so good. When I inserted the module, the transistor heat sink went into the gap between the top of TO-220 and the case. I wiggled it a bit until the hole in the heat sink, and the top hole of TO-220 approximately lined up. I was able to screw in the metal Phillips screw fine, so the heat sink should have a good connection to the case. But TO-220 was still "leaning back", meaning that the bottom hole of TO-220 was still at an angle. I tried unscrewing both screws, but the heatsink had wedged TO-220 firmly at that angle. Bruce On Mon, Apr 25, 2016 at 8:17 PM Ron D'Eau Claire <[email protected]> wrote: > Hi Bruce: > > Are talking about C180 near J4? I'll check into it. It won't be the first > time the engineers made a change and didn't realize it impacted the > assembly > instructions (I'm 600 miles from Watsonville, but only milliseconds by > voice > and e-mail. Still that can be "light years" at times, Hi!) > > I'm not sure what could put the TO-220 screw at an angle. The TO-220 heat > sink simply slips in between the retainer, which is then pulled tightly > against the TO-220 heat sink and the side of the case. That's the critical > part - good mechanical and thermal contact between the TO-220 heat sink and > the side of the case. > > Have you tried loosening both screws and then re-tightening them? What > comes > to mind is that in tightening the top screw, the retainer might have turned > slightly, misaligning the bottom screw in the hole. With everything in > place. Loosen both screws a bit, then retighten the bottom (nylon) screw to > hold the retainer, then tighten the top screw and see if things line up > better. > > I'd appreciate hearing if that works either at my address on this message > or > [email protected]. > > 73. Ron AC7AC > > -----Original Message----- > From: Elecraft [mailto:[email protected]] On Behalf Of > Bruce > Nourish > Sent: Monday, April 25, 2016 5:37 PM > To: Elecraft Reflector > Subject: [Elecraft] KX3 2m Install > > Hi folks, > > Last night I installed and configured a KX3 2m module following the current > instructions on the website (Rev C). My KX3 is a recent factory build. > Everything seems to be working fine; I haven't actually tried it on-air yet > (need to finish my 2m Moxon), but at least I didn't blow my rig up. > > I encountered one difference with the instructions: When installing the LO > coax on J4, I could not find any capacitor C120 to avoid. My KX3 simply > doesn't have C120 or R81 on that PCB. Has something changed in recent KX3s? > > The only hard part was the final installation, specifically clamping the > heatsink lug properly with retainer TO-220. It seems like the clamping > arrangement unavoidably puts the nylon bottom screw at a weird angle. I > double-checked the orientation of TO-220 and redid these steps over several > times, and couldn't figure out any other way to make it work. Is this > right? > If so, a clarification in the instructions would help. > > Bruce > ______________________________________________________________ > 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] > > ______________________________________________________________ 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]
