Elecraft KXPA100 Assembly Manual - Manual (Page 7)

7
Assembly Procedure
IMPORTANT ASSEMBLY INFORMATION
 Check off the steps as you finish each one. Skipping a step is easy to do without taking a moment
to be certain that you completed the previous step. This can result in serious damage to your
KXPA100 or, at a minimum, having to disassemble it to correct the mistake.
 Use your rule to check the length of screws and standoffs before installing them. Some
components are only 1/16” different from others but using the wrong size may result in parts not
fitting correctly, possibly damaging electrical and mechanical components. See Screws and
Standoffs on pg 6 for measurement instructions.
 Start all the screws in an assembly before tightening. When mounting parts with multiple screws
or adjacent parts that fit together, start all the screws in the threads before tightening any of them. If
you find that a screw is binding, loosen the other screws to free it, and then re-tighten.
 Ensure all screws are tight but do not over-tighten. Do not attempt to turn screws and nuts
beyond the point at which the lock washer is compressed. Screws without lock washers should be
tightened only until you feel significant resistance to further turning. Do not attempt to turn screws
or nuts 1/4 turn beyond “tight”.
 Threads can be easily stripped if too much force is applied when tightening screws. Use the
correct size hand tool and apply only moderate torque. Do not use a power screwdriver!
 Do not adjust the turns on any toroids. The position of the turns on the cores of many toroids has
been adjusted at the factory to produce exactly the inductance needed for the circuit to work
properly. Any attempt to adjust their position or to make a coil look “nicer” may seriously degrade
circuit performance.
 Remember your ESD protection. Failure to observe ESD precautions may result in your
KXPA100 not operating at all, or operating but not meeting normal factory performance
specifications due to damaged components. See Preventing Electrostatic Discharge Damage on
pg 5.
 Handle Printed Circuit (PC) Boards by their Edges. Avoid unnecessary mechanical stress on
any pc board components by careless handling.