Hammarlund HQ-180 Series Manual page 45

Step 8.
Step 9.
On the back of the front panel, replace the hardware removed in
Step 3.
Check that the dial calibration drive is correctly restored
with the transparent segment within the discs. Resolder the wires
to the meter and to the clock; see the Step 3 illustration for the
wire color code.
On the front of the panel, replace the hardware removed in Step 2.
Be careful not to scratch the panel when tightening the nuts, and
remember to line up the flats of the two controls indicated in the
Step 2 illustration,
After Step 9 is completed, check that the dials and the dial calibration system
operate smoothly and without interference. If necessary, loosen the front panel
screws of Step 4 and readjust panel positioning to obtain proper dial operation.
Step 10. Replace the two red pointers by pushing them onto the inner shafts.
Be careful not to bend them. Follow the instructions on the Step 11
diagram for capacitor plate meshing, then replace all knobs. Knob
identification appears in the Step 1 illustration.
Step 11. This step is for dial alignment.
Reconnect the Receiver and turn it on. Allow it to warm up for
about a half hour.
After the warm-up period, tune in to 4 MCS on the Main Tuning
Dial and 100 on the logging scale of the Band Spread Dial, and
turn on the crystal calibrator (see instructions in the User's Manual).
Set the dial calibrator so that the hairline is in line with the mark
on the top of the opening in the dial escutcheon.
Noting that the tuning capacitor plates are in the correct position
for the low end of the band (fully meshed), tune for zero beat,
ignoring the dial frequency setting.
Loosen the left dial set screw, hold the capacitor pulley to maintain
zero beat, then set the dial to exactly 4 MCS. Now tighten the dial
set screw again FIRMLY.
Turn the dial to gain access to the other set screw on that dial, and
tighten it firmly as well. Repeat the same procedure for the right
dial, but using 100 on the logging scale. this time.
This completes the dial calibration procedure. Check on other bands; if dial
calibration is far out, or not possible to be attained, RF alignment will have to
be undertaken.
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