JF1
- 180 -
JFl MISCELLANEOUS JACKFIELDS
JF1/l
60 way Telephone Jackfield to
answering facilities for 60 line
Television
Extension.
483mm
WITHDRAWN.
provide calling and
corded EMX at Glasgow
x 222mm. DD 1965.
JF2 AUDIO FREQUENCY JACKFIELDS
JF2/l
11 strips of 5 jacks each on 489mm x 133mm panel. Used on
DK3/6. DD 1958. OBSOLESCENT.
JF2/2
2 rows of 20 jacks each and 1 row of 20 sockets for fixed
attenuators on l33mm x 483mm pan type chassis. DD 1960.
OBSOLESCENT.
JF2/3
5 rows of 20 jacks each on 178mm x 483mm pan type chassis.
DD 1960. OBSOLESCENT.
JF2/4-8
Similar to JF/111-116 but with 63mm pan chassis for
mounting on four-poster bays. Number of rows of 20 jacks
is 1, 2, 3, 5 and 6 for JF2/4-8 respectively. SCPD 1967.
OBSOLESCENT.
JF2/9
Portable Audio Frequency Jackfield used with EP8/2. Imhof
cabinet with JF/lll, 115 etc. DD 1968. WITHDRAWN.
JF2/10
1 row of 16 jacks on 45mm x 483mm panel with 27mm spacing.
Used to monitor and designate amplifiers mounted in
PN3/23A. DD 1969. OBSOLESCENT.
JF2/ll
RSA Selection Desk Jackfield consisting of CH1/37B with 5
rows of 6 jacks each, wired to the plugs at the rear.
DD 1969. OBSOLESCENT.
JF3 COAXIAL JACKFIELDS
JF3/50l
2 groups each of 12 PO plugs with rear mounting plate for
attenuators on 45mm
x
483mm
panel.
Used on television
carrier system. DD 1956/59. OBSOLESCENT.
JF3/502
14 Coaxial U links and associated sockets and 14 montoring
sockets on 133mm x 483mm pan type chassis. Used in place
of
JF/35
on
bays
with
pan type chassis.
DD 1956/59.
OBSOLESCENT.
JF3/503
Single row jackfie1d with 14 plugs
socket. Similar to JF/33 but with
DD 1956/59. OBSOLESCENT.
and
pan
test plug and
type chassis.

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