Eico 667 - SCHEMATIC DIAGRAMS (Continued); Merit Test Schematics for Multiple Tube Types

667
TUBE
TESTER
^
EICQL
,
«
page
11
2
of
a
DUO-
TRIO
DE
j)
MERIT
TESTING
of OZ4,
OY4
cold-
cathode gas
rectifiers
(test
of one
section of
OZ4
shown).
117
VAC FROM
FIL.WDG.
IN
PHASE
WITH
<J>
I TO
PROVIDE SUF^
,
FICIENT
^VVV
VOLTAGE
FOR
INITIATING
<
CONDUCTION
RIG
GRID
^0tVW
R9
PLATE
tofil.
1
—
VW
VOLT.
Rs
Ml
i) MERIT TEST of light-duty diodes,
(showing
one diode
section
of
a triode
duo-diode,
such
as
a 12SQ7).
<D'
1)
MERIT
TEST for
O0I
power
rectifier
sec-
RI7*
tion
B
of
full-wave
\ RI7*
type.
4
TOFIL
VOLT.
k) MERIT TEST for power rectifier
section
A
of
full-wave type.