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  TRANSCONDUCTANCE meter on the AN/
39. Final Performance Test
USM31, ±10 percent error.
a. Use the TV2(*)/U and Test Set, Electron
e. Tubes and rated mutual conductance for
Tube AN/USM-31 to measure and record the
the tubes to be checked are as follows:
mutual conductance of each tube listed in e
below.
b. Use the FILAMENT, PLATE, SCREEN,
Tube type
Rated
mutual
conductance
and BIAS voltages derived from the TV2(*)
3E29
8,500 micromhos
/U tube test data roll chart, for their correspond-
6A6
3,100 micromhos
ing setting on the AN/USM-31.
6AT6
1,200 micromhos
6V6
4,100 micromhos
c. Calculate and record the mutual conduct-
7C7
1,300 micrornhos
ance by multiplying the rated mutual conduct.
12AU7
3,100 micromhos
ante listed in e below, times the percent quality
36
900 micromhos
value indicated for each tube on the PERCENT
41
2,200 micromhos
QUALITY meter of the TV-2(*)/U.
45
2,100 micromhos
955
d. The calculated mutual conductance of each
2,200 micromhos
5840
5,00O micromhos
tube measured on the TV2(*)/U will be equal
5873
2,900 micromhos
to the mutual conductance measured on the
Figure 24. MIL-STD resistor color code markings.
(Located in back of manual)
Figure 25. MIL-STD capacitor color code markings.
(Located in back of manual)
Figure 26.
Test Set, Electron Tube TV-2(*)/U, schematic diagram.
(Located in back of manual)
Figure 27.
Test Set, Electron Tube TV-2(*)/U, chassis and resistor mounting board
wiring diagram.
(Located in back of manual)
Figure 28.
Test Set, Electron Tube TV-2(*)/U, control and instrument panel,
wiring
diagram.
(Located in back of manual)
42
AGO 1428A
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