[Elecraft] KX1 - Power Amplifier Q6 Installation Question

[Chuck Guenther]

Hi Barry,

As you recall, I ran into the same thing when I completed s/n 2512, and 
that this was
reported to the Reflector March 29, 2011.  I hope that the Elecraft 
folks have noted the
problem with the standoff.

I also omitted the bottom lockwasher, and worried about the nylon screw 
bottoming out.
(It didn't).

I also worried about damaging the nylon screw during soldering, so I 
used a metal one
just during soldering.  (My kit contained two nylon screws, and I used a 
magnet to separate
the metal ones).

73,
Chuck Guenther
KX1 s/n 2512




Barry, K8QI, wrote:

"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."