UNl/l08. DD 1964. DD Spec 5.76. OBSOLETE.
As UNl/39 but with OS2/20A in place of OS2/20. DD 1966.
DD Spec 5.76. OBSOLESCENT.
Second Mixer and Oscillator Unit used in VHF/FM
translators and drive equipment to convert IF signals to
required RF output frequency and provide sufficient power
to drive final amplifier. Includes stable crystal
controlled local oscillator. Comprises CHl/27 with MXl/4,
AMl4/4, OS2/20A. Input frequency: 10.7MHz. Output
frequency: In band 87.5MHz to 97.5MHz. DD 1964.
DD Spec 5.78. ACO. OBSOLESCENT.
IF Unit used in VHF/FM translators and re-broadcast
receivers. Comprises CHl/27 with 2 AMI4/2, AM6/2, UNl/32.
Input and output frequency: 10.7Mc/s. DD 1964.
DD Spec 5.77. ACO. OBSOLETE.
8.8Mc/s Oscillator and Failure Switch. CHl/12A with
modified OS2/l8 and relay circuit to switch to reserve
unit in the event of failure. Mains operated. DD 1964.
DD Spec 5.80. WITHDRAWN.
Tone Detector used to monitor output of two oscillators
and give alarm if one fails. to UNl/9 but on CHl/18D.
DD 1964. DD Spec 2.226. WITHDRAWN.
SB Jack Unit used on PAl/41.
41l2B jacks and 4 U links.
CHl/18C with 3 STC type
DD 1968. DD Spec 2.227.
SB Jack Unit used in MN2M/4A and MN2M/6A to combine
functions of UNl/45 and filter in series FL4/47A-G. Can
be used as plug in replacement for UNl/45 in PA1/4l.
CHl/18C. DD 1964. DD Spec 11.120. OBSOLESCENT.
Jack Unit used on PAI/42. Comprises CHI/18C with 10 jacks
STC type 4l12B and line changeover U links. DD 1964.
DD Spec 2.220. TI.L.3. OBSOLESCENT.
Divider Unit used in Carrier Drive Panel (PASM/2A,
PA6M/2B). Divides frequency of square wave input by any
integer from 5 to 64. CHl/18C. DD 1964. DD Spec 2.239.
Oscillator and Oven
DD Spec 5.85. ACO.
Control Unit used in EP7/4, EP7/4A.
Used for remote switching between Dublin and Mohercrome.
DD 1964. WITHDRAWN.
Discriminator and Relay Unit used in RC5/4. CHl/27.
Includes UN15/l to feed AM7/4, and relay unit for
switching to stand-by battery. DD 1964. DD Spec 5.95.