j. Connect the test cord from the 5MA jack,
b. The FIL. CONT. SHORT lamp glows when
on the test meter, to pin 5, of the OCTAL tube
checking for filament continuity.
test socket, on the tube tester.
c. Check a IL4 tube known to have an open
filament.
k. Set the ON-OFF switch to the ON position.
d. The FIL. CONT. SHORT lamp does not
l. With the PRESS TO TEST P2 switch de-
glow when checking for filament continuity.
pressed, adjust t h e D I R E C T C U R R E N T
COARSE CONTROL and the DIRECT CUR-
38. Shunt Control Test
RENT FINE CONTROL, on the test meter until
the PERCENT QUALITY meter, on the tube
tester indicates full scale.
a. Set the PLATE switch to position 5.
m. The TS-682A/GSM-1 indicates 4.92 mil-
b. Set the SUPPRESSOR switch to position 8.
liamperes dc 5 percent error.
c. Set the PLATE-SCREEN RANGE switch
to position S.
n. Set the ON-OFF switch to the OFF position.
d. Set the GM-SIGNAL RANGE switch to
o. Remove the test cord on the 5MA jack, and
position E.
connect it to the 1MA jack, on the TS-682A/
e. Set the SHUNT fine control to position 10.
GSM-1.
f. Set the PLATE fine control fully clockwise.
p. Set the SHUNT fine control to position 90.
g. Set all other switches and controls to their
q. Set the ON-OFF switch to the ON position.
neutral or OFF positions (vertical position for
r. With the PRESS TO TEST P2 switch de-
switches, extreme counterclockwise position for
pressed, adjust t h e D I R E C T C U R R E N T
controls).
COARSE CONTROL and the DIRECT CUR-
h. Connect the test cords of the TS-682A/
RENT FINE CONTROL, on the TS-682A/
GSM-1 to the COMMON and 5MA jacks on the
GSM1 until the PERCENT QUALITY meter,
test meter.
on the tube tester indicates full scale.
i. Connect the test cord from the COMMON
s. The TS-682A/GSM-1 indicates 0.605-mil-
jack, on the test meter, to pin 8, of the OCTAL
liampere dc 5 percent error.
tube test socket, on the tube tester.
AGO 1428A
40
