e) Alignment
The coils and transformers in your Transceiver have been preset at the factory. Only
slight readjustments should be necessary during the following alignment procedure.
The following equipment is necessary for alignment of the Transceiver.
An 11 megohm input VTVM, such as the Heath Model IM-11 , (a 20 K/V VOM
may also be used).
A 50 nonreactive dummy load that is capable of 100 watts dissipation, such as
the Heathkit Model HN-31. Do not use light bulbs as a dummy load, as their
resistance varies radically with voltage.
A receiver capable of receiving WWV, such as the Heath Model GR-54, at 2.5, 5,
10, or 15 MHz. If this type of receiver is not available, a receiver tunable to a
standard broadcast station that is operating at an even multiple of 100 kHz (such
as 600 kHz, 1000 kHz, etc.) can be used.
For the alignment of the transmitter section it is recommended that you use an
oscilloscope, such as the Heathkit Model SB-610 Monitor Scope to observe the output
RF envelope.
WARNING: Do not place the Transceiver in the transmit mode of operation until directed
to do so or the Transceiver may be seriously damaged.
1. Set the ANTENNA switch (located on rear of chassis) to the COM position (SB-101 only?).
Connect a 50 dummy load, capable of 100 watts dissipation, to the RF OUT jack on the rear
of the chassis. CAUTION: Do not use light bulbs as a dummy load.
Be sure an 8 speaker is connected to the 8 jack on the rear of the chassis.
Preset the CAL XTAL trimmer so its notch is towards the 100 kHz crystal as shown in Figure 1-1
(fold-out from Page 82).
Preset the front panel controls as follows:
f) DRIVER PRESELECTOR - 12 o'clock position (3.7,7.2,14.2).
g) MIC/CW LEVEL - fully counter clockwise.
h) MODE - LSB
i) BAND - 3.5
j) Main tuning dial (LMO) - 3.7 MHz (upper dial pointer at 2, and the circular dial at
0).
k) FUNCTION - PTT.
Alignment Page 32
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