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GEl
GEl MISCELLANEOUS GENERATORS
GEl/l
Used to provide l7c/s ringing current on Roving Eye.
DD 1957. WITHDRAWN.
GEl/2
Gunfire Effects Generator. Improved version of GEG/l.
Simulates electronically rifle and machine-gun fire and
with additional tone control equipment will simulate
pistol and heavy gun fire. Mains operated. Weight: l4lb.
DD 1960. DD Spec 3.284. DDHB 3.56. WITHDRAWN.
GEl/3
Tone Generator used in automatic monitors to generate a
binary tone signal in response to a binary input signal.
CHl/12A, pegs 22, 27. DD 1965. DD Spec 5.118. ACO.
OBSOLESCENT.
Motor Supply Generator, 37Hz, used in PA2M/7 to operate
the motor in the tape unit. CHl/18C, pegs 6, 40.
DD 1966. DD Spec 2.261. ACO. OBSOLESCENT.
GEl/4
GEl/4A
As GEl/4 but output frequency is 25Hz for use with RP4/3A.
DD 1972. OBSOLESCENT.
GEl/5
Signal Acknowledgement Generator permanently connected to
a telephone line to acknowledge signals received from
PA2M/7. Internal battery. Output: 2V p-p, 1. 5kHz, into
300~. Eddystone box. DD 1967. DD Spec 2:291. ACO.
OBSOLESCENT.
GEl/SA
As GEl/5 but with switch fitted on a panel remote from the
box. DD 1967. DD Spec 2.291. OBSOLESCEMT.
GEl/6
1.5kHz Audible Tone Generator used to acknowledge
Automatic Fault Reporter PAZM/7 by applying 1.5kHz tone to
a telephone mouthpiece. Small Eddystone box. DD 1967.
DD Spec 2.290. ACO. OBSOLESCENT.
GEl/7
Intermittent 400Hz Tone Generator first used at Bristol
with UNlO/15. Outputs: (a) 400Hz tone interrupted for
approximately 0.5s every second for identification or as
engaged signal on telephone lines; (b) 20 isolated sources
of 50V, earth interrupted at the same rate as (a), in two
groups of 10, one group being ON when the other is OFF, to
cause lamps to flash or alarms to sound intermittently.
Each group has a capacity of lA. CHl/18C, with 2 Painton
15 way inline plugs, coding peg 16 only. DD 1968.
OBSOLESCENT.
GEl/9
Audible Tone Generator used in EPlM/ll to give an audible
acknowledgement signal when a switching function has taken
place. Loudspeaker and gain control are mounted
externally. 25 way ISEP plug. DD 1969. WITHDRAWN.
GEl/ID
Audible Tone Generator for producing acknowledgement tone
on control desks. Printed board. DD 1970. WITHDRAWN.
GEl/ll
Tone Generator, for use
supply ringing tone
at Golders Green Hippodrome, to
distribution from a single

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