(
1
Adjust the High End trimmer for the greatest S-meter
deflection and note the meter reading.
(
)
Tune the Transceiver to the frequency having the
lower meter reading, if necessary. If the 29 000 kHz
frequency has the lower meter reading, adjust the Low
End trimmer to increase the reading. If the 28 000
kHz frequency had the lower reading, turn the BAND
switch to 28.0, tune to 28 000 kHz, and adjust the
High End trimmer to increase the meter reading.
( )
Repeat the adjustments two or three times for the
most uniform response across the band.
(
)
Follow the same procedure and adjust the bandpass
filters for the 21.0, 14.0. 7.0, and 3.5 bands. The
trimmers for each band are shown in Figure
1-9. Refer
to Figure
1-1 1 for the three frequencies to use for the
adjustments of each filter.
I I
FREQUENCIES
I
MID-BAND
I
RDJ.
3
LOW
END
HLGH
END
TRIMMERS
I
29400 29 000 29 700
(
)
Connect an antenna (suitable for the frequency of the
calibration station selected) to the COM antenna
socket. Be sure the rear panel switch
is
still
at COM.
(
)
Turn the BAND switch to WWV or 7.0, as appropriate.
(
)
Depress the ON button.
(
Tune to zero beat station
WWV
in the vicinity of
15.000 kHz or station CHU at 7335.0 kHz.
(
)
Adjust the tuning so the voice announcements sound
natural.
(
I
Adjust the time
base
trimmer capacitor on the upper
right-hand corner of circuit board A (next to the
crystal) until the display reads
15,000.0 or 7335.0.
POSSIBLE CAUSE CHART
1. Display cannot be adjusted to agree with
WWV
or
CHU frequencies.
A.
YlOl not with~n tolerance.
6.
C114 defective.
(
)
Release the ON button.
LOW POWER TRANSMITTER CHECK
(
)
Set the SMETER LEVEL ADJUST control (see
and GJ with 6-32
x
318" screws.
Figure
1.3, fold.out from Page 237)
for
an
(
\)
Plug the HI and LO shielded leadscomingfromchassis
reading of
S9+50.
cutout BL into the corresponding sockets on the
(
)
Remove the phono plug from the ANT socket on the
driver circuit board.
'%.'?
21-215
~ii~i5'5
7-7'5
5.
rear panel and unsolder and remove the shielded cable
(
,
Connect a dummy load (capable of dissipating
100
and the 18 pF capacitor from the foil side of circuit
board A.
watts) to the ANT (antenna) socket on the rear panel.
(
)
Remove the extender board and reinstall circuit board
( )
set
the BAND switch to 3.5.
G
in position G.
(
Turn the LEVEL control fully wunterclockwise.
Figure
1-1
1
)
Refer to Pictorial 12-38 (fold-out from Page 243) and
mount
the
driver circuit board (#85-14211 on the
(
1
Tune the Transceiver to 3800 kHz. Then select th
right side panel. Plug the circuit board into connector
strongest signal within 5 kHz of this frequency.
J
and secure
it
to the three mounting holes at GG. GH.
28.0
28.
5
21.0
14.0
.
7.0
3.5
COUNTER CLOCK SETTING
(
1
Turn the SIDE TONE and ANTI-VOX controls fully
28 400
21 100
14 200
7
100
3
800
NOTE: The counter clock output will be calibrated against
counterclockwise (rear panel view).
the signal of station WWV, Colorado, on 15,000 kHz or
station CHU, Canada, on 7.335 kHz. One
of the stations
(
Depress the ON. PWR and TUNE buttons. All other
may be more easily received than the other in your location.
buttons should be released.
28 000
21 000
14 000
7
000
3
500
29 000
21 400
7
300
'4400
-
4
000
()
Check coil L321 on circuit board C (#85-1420.3) to
be sure the coil slug
is
still flush with the bottom of
the coil form (see Pictorial
5-1 2 on Page 89).
(
Plug in circuit board C. Visually check to make sure
i
'1
-
the peaking coils do not touch the metal shield. If
necessary, bend them over enough to clear the shield.
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