Heathkit SB-1000 - Initial Tests and Alignment; Initial Tests

Heathkit
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(j Turn the MULTIMETER switch to PLATE CUR-
RENT.
Wt Push the OPR/STBY switch to OPR.
WY Plug a shielded cable into the RELAY socket on
the rear of the chassis. Then touch the inner wy
conductor at the free end of the cable to the
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meee
chassis. The Multimeter should indicate be-
tween 50 and 80 milliamperes (on the top
scale).
ia Push the OPR/STBY switch to STBY.
Push the PWR/OFF switch to OFF and unplug
the line cord.
ALIGNMENT
Refer to Pictorial 7-4 while you perform the follow- MM 5. Reposition the top cover on the chassis so you
ing steps. have access to the coils in the input filter
assembly (approximately a 3/4" to 1" gap).
yf. Preset control R204 on the meter circuit board
to 10 o'clock. Ms. Plug the Amplifier line cord into the proper
AC outlet.
. CA Connect a wattmeter between your exciter and
the RF IN socket of the Amplifier as shown in wo Push the Amplifier POWER switch to ON.
the Pictorial. NOTE: The wattmeter must be
capable of indicating both forward and reflect- eas Turn on your exciter and allow it to warm up.
ed power.
wh Connect a 50 Q noninductive dummy load to
the RF OUT socket of the Amplifier. Be sure
. Set the BAND switches of both your exciter
and the Amplifier to 160 meters.
the dummy load can dissipate at least 850 (10. Set your exciter for 1.9 MHz. Do not place the
watts,
WA Connect a shielded cable from the RELAY sock- vv
et on the rear of the Amplifier to your exciter
so that the cable is shorted in transmit and
open in receive. NOTE: Refer to the “Installa-
tion" section for more information about this
connection.
w
Table 8-1
exciter in the transmit mode yet.
41.Turn the MULTIMETER switch to POWER
OUTPUT.
uw 12. Push the OPR/STBY switch to OPR, if this
has not already been done.
13. Preset the PLATE and LOAD controls to the
positions indicated in Table 8-1.