Heathkit SB-10 Series Troubleshooting Manual page 4

An 11 megohm input VTVM, such as the Heath Model IM-11 , (a 20 K /V VOM may
also be used)..................................................................................................................32
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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......................................................................32
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......................................................................32
f)DRIVER PRESELECTOR - 12 o'clock position (3.7,7.2,14.2)..................................32
g)MIC/CW LEVEL - fully counter clockwise................................................................32
h)MODE - LSB................................................................................................................32
i)BAND - 3.5....................................................................................................................32
j)Main tuning dial (LMO) - 3.7 MHz (upper dial pointer at 2, and the circular dial at
0)......................................................................................................................................32
k)FUNCTION - PTT.........................................................................................................32
l)FREQ CONTROL - LOCKED NORMAL......................................................................33
m)RF GAIN - fully clockwise.........................................................................................33
n)FILTER - SSB..............................................................................................................33
o)METER - ALC..............................................................................................................33
p)AF GAIN - 9 o'clock position.....................................................................................33
p.1.S-Meter Adjustment........................................................................................................33
p.2.Receiver Alignment........................................................................................................33
p.2.1.Preliminary Heterodyne Oscillator Alignment...............................................................................................33
p.2.2.IF Alignment................................................................................................................................................. 34
a)Adjust transformer T201 for maximum volume......................................................34
q)Adjust the top and bottom slugs of transformer T102 for a maximum volume or
S Meter indication..........................................................................................................34
r)Adjust the slug of transformer TI03 for a maximum S-Meter indication...............34
s)Repeat the adjustments of transformers T201, TI02, and TI03 for a maximum S-
Meter indication.............................................................................................................34
s.1.1.Preliminary Driver Grid and Plate Coil Alignment.........................................................................................34
s.2.Transmitter Alignment...................................................................................................36
HW & SB Series Manual
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