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154
T Y P E
6 0 3 E L E C T R O N I C M U L T I P L I E R
A24 (2jL6).
Power tube controlled by A23
A342 (12SN7). Follower tube for
ON
side of A29
switch; provides 5 positive pulses to half-entry
trigger.
switches in N chassis.
A3
j
(12SN7). Control trigger for A36 power
AZj (6SK7). Start switch providing pulses to pri-
tube;
ON
at 8 and
OFF
at 12. Conduction
mary timer under control of trigger A31; A
through A36 stops at 12 when A35 goes
OFF.
pulses
are
to
A3 6 (2jL6). Normally conducting power tube
pulses for primary timer.
which stops conducting at 12 when A3 5 goes
A26 (12SN7). First stage trigger of primary
OFF
to
a positive pulse to advance the
timer which turns
ON
every odd-numbered
pulse from A25 switch and turns
OFF
at
multiplier counter I for each primary cycle.
every even-numbered pulse, thus going
ON
eight times in each primary cycle.
A27 (12SN7). Second stage of primary timer
which triggers when A26 goes
OFF,
therefore
going
ON
every 4 pulses from A25 switch be-
ginning at 2 and going
OFF
every 4 pulses
beginning at 4.
A28 (12SN7). Third stage of primary timer
which triggers when A27 goes
OFF,
therefore
going
ON
every 8 pulses from A25 switch be-
ginning at 4 and going
OFF
every 8 pulses
beginning at 8.
A29 (12SN7). Fourth stage of primary timer
which triggers when A28 goes
OFF,
therefore
being
ON
from 8 to
O
of each primary cycle.
A3 0 Test socket position for primary timer.
A3 1 (1 2SN7).
Trigger controlling starting and
stopping of computations by conditioning A-
25 start switch to accept A pulses; turned
ON
when A32 trigger goes
ON
and turned
OFF
at end of computation by negative pulse from
column shift control.
A32 (12SN7). Compute start trigger under con-
trol of P24 cam contact in punch unit; turned
ON
by P24 and cancelled
OFF.
This trigger
is necessary to permit the computation to ter-
minate before P24 (or the manual control
switch) opens.
A33 (6SK7). Switch providing negative pulses at
10 and 14 under control of primary timer to
,turn B3 trigger
ON
a12d
OFF.
A34, (12SN7). Follower tube for
OFF
side of
A29 trigger in primary timer; used to relieve
load on trigger.
Bl. Not used.
B2 (2
j
L6). Stops conducting at 10 under control
of B91 to provide a positive pulse to the
L
chassis for stopping the output of pulses from
the multiplicand when transferring the multi-
plicand to the product counter.
B3 ( I 2Sh77). Control trigger
ON
from 10 through
14; controls other tubes through the follower
tubes B91 and B92.
B-f (6SK7). Switch tube for turning trigger B16
ON
at 0.5. Grid of B4 is conditioned by A342
from 0 through 8 and suppressor receives B
pulses; only the 0.5 pulse is used to turn B16
O N .
B T (6SK7). Switch providing 10 pulses from
O . j
through 10.
j
under control of Bl 11 and Bl In.
A pulses are fed to the suppressor of B5
;
10
are passed and fed to power tube B6 as
B
pulses.
B6 (2JL6). Power tube ~ r o v i d i n ~
ten A pulses for
rolling multiplicand counter when trans-
ferring from MC to product counter.
Ten
B pulses applied to the grid of B6 appear as
ten A pulses at the anode of B6.
B7 Test socket position for control triggers on B
chassis.
B8 ( 2 j L6). Conducts at 14 under control of B91
to provide a negative pulse at 14 to turn
OFF
any carry triggers in
W
and
X
chassis which
may be
ON
at end of adding cycle.
B91 (12SN7). Follower for
ON
side of trigger B3.
Anode potential is low when B3 is
ON
from
10 through 14; controls B8 and B2 power
tubes.
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