DRAKE SPR-4 Spezifikationen PDF herunterladen (Seite 25)

the notch control at 12 o’clock and adjust the main tuning knob for max-

imum AVC voltage

(

positive going

)

Altemately adjust the notch control

and the notch depth control, R57, for maximum AVC voltage (positive

going

)

5.3.5

S-METER

ADJUSTMENT

Tune

in a 10,000 microvolt signal on 7.2 MHz LSB and looking into the

top of the

chassis

with the front panel

facing

you,

adjust R73, the left

control on the S-meter circuit board for + 4.5 volts on the middle top ter-

minal of the

meter

board and has a

white/black

tracer wire

connected

Remove the 10,000 microvolt signal and adjust R64, the right control

for

meter

zero .

Because these controls interact slightly, repeat the above

procedure

until no further interaction occurs .

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DRAKE SPR-4 Spezifikationen Seite 25