UN3/9
UN3/l0
UN3/l1
UN3/l2
UN3/l2A
UN3/13
UN3/l3A
UN3/l4
UN3/l5
UN3/l6
UN3/l7
UN3/lS
UN3/l9
UN3/20A,20B
369 -
UN3
O.B. Control
amplifiers.
WITHDRAWN.
Unit used
l52mm x
with Marconi and
l52mm x l7Smm.
Pye mixer
DD 1965/66.
Used in PA6M/53.
WITHDRAWN.
CHI/lSE, pegs 4, 44.
DD 1965/66.
Delay Control Unit operated by relays, for delaying rewind
of tape when RP4/3A is used in the record mode. Printed
board on chassis 10Smm x 95mm x 25mm. Superseded by
UN3/lS. DD 1965/66. WITHDRAWN.
Central Control Unit used in PA2M/7 to control logical
sequences. CHl/lSC, pegs 6, 41. DD 1966. DD Spec 2.264.
ACO. OBSOLESCENT.
Modified UN3/l2 used with
DD Spec 2.353. OBSOLESCENT.
PA2M/7A.
DD 1970.
Peripheral Control Unit used in PA2M/7. Includes tape
amplifiers, ringing detector and acknowledgment signal
receiver. CHl/18C, pegs 6, 42. DD 1966. DD Spec 2.263.
ACO. OBSOLESCENT.
Modified UN3/l3 used with
DD Spec 2.357. OBSOLESCENT.
PA2M/7A.
DD 1970.
Speed Control Unit for motor used in programme
Includes OS3/4, 3 AMl/19 and PS2/58 on special
DD 1967. WITHDRAWN.
effects.
chassis.
Used to operate voltage operated relays at Pontop Pike
transmitting station by applying +50V d.c. with transistor
timed delay (3 seconds approximately to reduce switching
pulse)
to
one
conductor
of an
audio
line.
CHl/lSC.
DD 1967. WITHDRAWN.
Scan Control Unit used to drive UNl/98 and give out pulses
of tone corresponding to input from UN1/9S. ISEP printed
board. DD 1967. DD Spec 2.333. ACO. OBSOLESCENT.
Studio Control Unit used in EP5/ll. Includes switches for
group selection, echo, PPM. DD 1968. ACO. WITHDRAWN.
Delay Control Unit used in PA6/57 to change
reproducing mode to the recording mode. Plug
with printed board and relays. DD 1968. DD
OBSOLETE.
from the
in chassis
Spec 1.51.
Pre-transmission Test Control Unit used at Bush House in
conjunction with PA6M/56 for pre-transmission checking of
studio control room routing and lines, and for presence of
operator in studio. Includes power suppliers. Box 305mm
x l78mm x l78mm. DD 1968. OBSOLESCENT.
Programme Effects Remote Control Unit. A = 4 way; B = 6
way.
Used with EPlM/8,
EPlM/9.
Eddystone
box
190mm x
121mm x 76mm. DD 1968. DD Spec 1.64. OBSOLETE.

69