Elecraft KPA100 Manual - Manual (Page 52)

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Optional: If you want to re-do power calibration (R26/R27) at a
higher power level, do so now. 50 watts is a good choice.
Check output capability, signal quality, and current drain on the
remaining bands.
SSB Mode Transmit Tests (Requires KSB2 Option)
Switch to USB or LSB mode. Connect a microphone to the K2.
Set the compression level (SSBC) to 1-1 using the menu. This turns
off speech compression, allowing you to better hear your voice quality in
the next step.
Using headphones with the monitor receiver, listen carefully to your
SSB signal at both 5 watts and 20 watts. If the signal quality is good in
both cases, with no sign of distortion, try higher power levels (up to 100
watts or the rated power of your dummy load).
Before you go "live" in SSB mode, you should make sure that
you've properly aligned your K2/100 transceiver's filters for USB and
LSB transmit. SSB transmit filter alignment (that is, adjustment of the
BFO settings for FL1) can be done by listening critically in a monitor
receiver, or with the help of a station nearby, or by using a computer
spectral analysis program. Refer to the KSB2 manual or our web site for
additional information.
RS-232 Port Test
If your K2 is s/n 2999 or lower, you must modify your Control board
as described on page 59 before the RS-232 port can be used. If you have
already made this modification, skip to the next step.
We recommend that you build a serial cable and complete RS-232
interface tests now, before installing the KP100. (See RS-232 Interface
Setup and Test on page 60.) However, if you don't plan to use computer
control right away, you can do the tests at any time.
Shield Assembly
Turn off the K2.
Locate the KPA100 shield and the three spring clips (see drawings in
the parts list).
Orient the shield as shown in the top view of Figure 40 (page 53).
The top and back edge views in the figure show the proper orientation of
the spring clips, which will be installed in the next step.
Install spring clips at the locations identified by the letter C in Figure
40. As shown by the dotted lines, the clips should be installed on the
bottom side of the shield. Use 4-40 x 3/16" black pan head screws, 4-40
nuts, and split lock washers. Do not over-tighten the hardware.
i
The lock washers go between the nuts and the spring clips, not
between the spring clips and the shield.
Each clip should be perpendicular to the edge of the shield, and
extending beyond the edge by about the amount shown. If necessary,
loosen the hardware slightly and adjust the positions of the spring clips so
that they closely match the drawing. Then re-tighten the hardware.