EQl/515
EQl/517
EQ1/518
EQl/519
EQl/52l
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EQl
Delay Equaliser ccntaining a video equaliser and delay
sections for corr.cting the video signal from a one-field
delay in PA7/506. Part of PA1M/548. CH1/12A. Superseded
by EQ1/517. DD 1!67/68. WITHDRAWN.
Equaliser and De:.ay Unit used in PAlM/548 to correct the
video signal f:~om the one field delay of PA7/506.
Replaces EQ1/515. CH1/12A. DD 1969. WITHDRAWN.
Field Delay Equ,Lliser first used in C06/507. Provides
:!:1dB gain at 30MH: :t6MHz and an adjustable step response
of t1dB within th~s range. Mains operated. CHl/12A, pegs
72, 73. DD 1969. WITHDRAWN.
Cable Delay Variib1e Equaliser first used in C06/507 for
cable delays havi1g from 2dB to l4dB loss at 30MHz giving
equalisation to.2:lB over t6MHz. Mains operated. Metal
case 152mm x 57nnn x 60mm. DD 1970. WITHDRAWN.
Group Delay Equa1lser, for use in temporaty OB television
links to correct group delay distortion. Diecast box.
DD 1971. DDTM 6.~6. OBSOLESCENT.
=====================c====_=_==========================~==================
EQ1 Sub Group not available for new designs DD 1977.
EQ3/1
EQ3/2
EQ3/3
EQ3/4,5,6
EQ3/7
EQ3/8
EQ3/9
EQ3 AUDIO EREQUENCY EQUALISERS
Used to correct ,ariations due to seasonal temperature
changes on S.B. music circuits on P.O. carrier cable
phantoms. Simi1~r to TCU/1 but basic correction at high
temperatures instead of low. Two units on CH/18 chassis.
Originally coded TCU/7. Superseded by EQ3/8. DD 1956.
OBSOLESCENT.
Similar to EQ3/1 but for 401b unloaded S.B. circuits.
Replaces TCU/2. Originally coded TCU/8. DD 1956.
OBSOLESCENT.
Similar to EQ3/2 but for recent types of 401b S.B. lines.
DD 1956. OBSOLE~CENT.
Used on EQ3/7. ]ID 1956. OBSOLESCENT.
483mm x 372mm pa1le1 mounting 2 EQ3/4, 2 EQ3/5, 2 EQ3/5 for
delay correction of 100 miles of loaded cable. DD 1956.
OBSOLESCENT.
Similar to EQ3/l which it replaces but suitable for cables
with
P.O.
amp1:.fying
stations
as
closer
distances.
DD 1958. DD Spec: 2.125. OBSOLESCENT.
Used for temperHture correction on lightly loaded 20lb
music lines. ~~o units on CH/18 chassis. DD 1960.

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