Eico HF-12 Instruction Manual page 9

TUBE
ECC83/12AX7
VI
ECC83/12AX7
V
2
ECC83/12AX7
V3
EL 84
V4
EL84
V5
EZ81
V6
VOLTAGE
AND
RESISTANCE
CHART
DC VOLTS DC VOLTS
AC
VOLTS
(1
kc)
RESISTANCE
PIN*
NO
SIGNAL
12
W
OUT
12
W
OUT UNIT OFF
1
108 108 0.52
300KO
2 0 0
0.028
1MO
3 1.2 1.2 0
4.7KO
4&5
filament
(12
*
14
DC;
6.
3
VAC
to pin 9)
165*1900
6
68 68 0.028
300KO
7 0 0 0.005
480KO
8
9
0.6
fi
lament
0.6 0.009
2.2KO
165*1900
1
185 185 2 75
KO
2
0 0 0.5
500KO
3 1.4
1.4 0.265
1.2KO
4,5 filament (12
-
14VDC;
6.3
VAC
to
pin
9)
165-190
0
6 180 180 1.38
130KO
7
0
0 0.26 400
KO
8
9
1.6
filament
1.6
0.135
3.3KO
165 - 190
0
1
190
190
7.7 120KO
2 91
90
8
480KO
3
93 92 7.7
100KO
4&5
filament
(12
"
14VDC;
6.3
VAC
to pin 9)
165*1900
6 91 90 8
480
KO
7 0 0
1.37
210KO
8
9
0.85
filament
0.8 1.25
1.8KO
165-1900
1
-
—
—
—
2 0 0
7.7
340KO
3 12
14.2 0.05
165-1900
4&5
filament
(12
"
14VDC;
6.3VAC
between)
165-1900
6
-
—
- -
7 330 324 176
1600
8
- - - -
9 336 330 3.9
0
1
-
_
— -
2 0 0
7.7
340KO
3 12
14.2 .05
165-1900
4&5
filament
(12
-
I4VDC;
6.3VAC
between)
165-1900
6
- - -
-
7
330 324 176 200
0
8
- - - -
9
336 330 3.9 0
1-
-
-
280
95
0
2
-
- - -
3
336
330
-
160KO
4&
5
filament
(12
-
14VDC;
6.3
VAC
betw een)
165-1900
6
-
-
-
—
7
- -
280 95
0
8
- - -
-
9 336 330
-
160KO
AH
resistance
measurements
/
except
those
made
from pins
3 and 9
of the
EZ81,
are
made
with pins 3
and 9of
the
EZ81 grounded
.
All
voltages
and
resistances
are^neasured
to
chassis
with
the
volume
control set
to
10
on
the dial, the
TREBLE and BASS con-
trols
set to
0 and
the
SELECTOR SWITCH
set to
AUX.
For voltage measurements
at
12W
output,
set the input selector to the
PHONO
position
and feed a 0.010 volt
(lOmv)
1
kc
signal to the
mag. phono
input jack;
connect
a resistive
(preferably
non-
inductive) load
of
equal
resistance to
the tap selected
(±20%) and capable
of
handling
25 watts. Voltage measurements
are
made
with a
VTVM.
Operating
line
voltage
at
which voltage measurements
are
made
is
117
VAC,
60cps.
NOTE:
ALL
VOLTAGE
AND
RESISTANCE VALUES
MAY
VARY NORMALLY
BY ±15%.
8