EQ3
- 122 -
DD Spec 2.162. OBSOLESCENT.
EQ3/10
Used for correction of
changes on 251b loaded
76mm x 64mm x
OBSOLESCENT.
effE:cts due to seasonal temperature
S.B. music lines. Printed wiring.
51nu::.
DD 1961.
DD Spec 2.182.
EQ 3/11
Used on S.B. music lines. CHl/18D.
DD Spec 2.208. TI.L3. OB~OLESCENT.
DD 1962.
EQ3/12
Electrically as
printed wiring.
lines. DD 1962.
EM12/1 lut constructed on CH1/l8C with
Used wjth EQ3/13 and EQ3/14 on O.B.
DD Spec = .209. TI.L3. OBSOLETE.
EQ3/13
Electrically as
printed wiring.
lines. DD 1962.
EV3/5 but constructed on CH1/18C with
Used witl EP3/12 and EQ3/14 on O.B.
DD Spec ~ .210. TI.L3. OBSOLETE.
EQ3/14
Electrically as
printed wiring.
lines. DD 1962.
EV5/3 blt constructed on CHl/18C with
Used wjth EQ3/l2 and EQ3/l3 on O.B.
DD Spec ~ .211. TI.L3. OBSOLETE.
EQ3/l5
Variable
range at
printed
OBSOLETE.
Equaliser e1ectrjca11y as EV9/l with extended
high frequencies, but constructed on CHl/18D with
wiring.
DD 19E2.
DD Spec 2.245.
TI.L3.
EQ3/16
EQ3/17
EQ3/l8
Re-coded PA1/41. DD 1964. DD Spec 2.221. OBSOLESCENT.
Re-coded PA1/42. DD 1964. DD Spec 2.218. OBSOLESCENT.
Used to correct variations due to seasonal temperature
changes
on
40lb
un10adec
SB
music
circuits.
Basic
correction at high temleratures. CH2A/l. DD 1964.
DD Spec 2.231. OBSOLESCEN1.
EQ3/19
Used to correct variaticns due to seasonal temperature
changes on SB music circuits on PO carrier cable phantoms.
Basic correction at high temperatures. CH2A/1. DD 1964.
DD Spec 2.232. OBSOLESCEN1.
EQ3/20
Used to correct for changes in
characteristic
of
40/16/J .136
SB
music
changes of temperature. CF2A/1. DD 1964.
OBSOLESCENT.
loss/frequency
circuits with
DD Spec 2.233.
EQ3/21
As EQ3/18, but for more recent types of 401b SB line.
CH2A/l. DD 1964. DD Spec 2.234. OBSOLESCENT.
EQ3/23
As EQ3/9 but in CH2A/].
OBSOLESCENT.
DD 1964.
DD Spec 2.236.
EQ3/24
Used to correct for changes in loss/frequency
characteristic
of
SB
music
circuits on 401b pairs with
22mH loading, spaced at l.83km. CH2A/1. DD 1964.
DD Spec 2.237. OBSOLESCEN1.

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