There is a warning in bold letters stating that both washers need to be in place or Q6 will not lay flat against the heat sink pad.
I had difficulty getting the threads started too. It took several attempts. I wonder if maybe compressing the split washers in a vise will take enough "spring" out of them to give you the gap needed to get the threads started. I used the nylon flathead screw to temporarily hold Q6 in place while it was soldered in place. It survived. It doesn't have to be real tight. Chuck K4QS KX1#2509 --- On Thu, 4/7/11, K8QI <[email protected]> wrote: > From: K8QI <[email protected]> > Subject: [Elecraft] KX1 - Power Amplifier Q6 Installation Question > To: [email protected] > Date: Thursday, April 7, 2011, 7:52 AM > I am currently building Serial # > 2520. Going well with no problems found > during the testing of Phase #1 or > #2. Thanks to all for the great > suggestions to a new kit builder. > > Figure 24 shows the installation of the standoff using 2 > split washers, One > below and one on top of the board. I am > not able to get the threads to > catch using the 2 washers. So I only used the > one on the top of the board > to maintain the correct heigth of the > standoff. I am a little concerned > that the threads from the 3/16 Pan head and the Nylon 1/4 > Flat Head may > contact inside the standoff and result in the Power > Amplifier Q6 being loose > and not making good contact with the Thermal Pad. Did > anyone else have this > problem? What was your > solution? > > During the solder process for the Power Transistor Q6, the > instructions > state to "Temporarily secure Q6 with a 4-40 flat head > screw....." My > question is should I use the nylon flat head or the metal > flat head for this > solder step. Any possibility of deforming > the nylon flat head during the > soldering process due to heat transfer? My > thought is no, use the nylon. > Thought I would ask, since I already have the question > above. > > If all goes well, I hope to have my new KX1 on the air on > 20 and 40 meters > this weekend. > > Thanks and 73, > > Barry K8QI > > -- > View this message in context: > http://elecraft.365791.n2.nabble.com/KX1-Power-Amplifier-Q6-Installation-Question-tp6249642p6249642.html > Sent from the Elecraft mailing list archive at 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 > ______________________________________________________________ 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
