PN3/l0A
PN3/ll
PN3/l2
PN3/l2A
PN3/l3
PN3/l4
PN3/l5
PN3/l6
PN3/l7
PN3/l8
PN3/l9
PN3/20
PN3/2l
PN3/23
PN3/23D
299 -
PN3
493mm x 349mm panel used on EPl/502. OBSOLESCENT.
483mm x 272mm panel for mounting 4 plug-in UNlO/4. 1959.
DD Spec 2.127. OBSOLESCENT.
483mm x 222mm panel for mounting plug-in PS3/8 and 3
amplifiers of type used in Type B studio equipment. RX4.
1959. DD Spec 3.237. T1.L.2. OBSOLESCENT.
As PN3/12 but
DD Spec 3.327.
input and
OBSOLESCENT.
listen
output
jacks
added.
483mm x 178mm panel for mounting 8 plug-in AM4/3.
Contains output transformers, dropping resistors and
decoup1ing
capacitors.
DD 1959.
DD Spec 3.249.
OBSOLESCENT.
Similar to AP/3A with amplifier sockets turned through
180. Used at Cardiff. 1959. OBSOLESCENT.
Similar to AP/2 but with amplifier sockets turned through
180. Suffix A indicates wiring added. Used at Cardiff.
1959. OBSOLESCENT.
483mm x 222mm
FWTR/1. 1959.
panel for mounting
OBSOLESCENT.
4
units
similar
to
483mm x l33mm panel for mounting 8 units constructed on
CH1/l1 or 4 on CH1/11A e.g. AM4/505 and PS2/502.
Superseded by PN3/21. Accessories include PN3A/1,
PN3A/lA, PN3A/2. 1959. DD Spec 8.43. OBSOLESCENT.
483mm x 400mm panel for mounting 8 OS2/l0 (4 main, 4
reserve), and 4 UNl/9. First used on VF remote switching
system between Glasgow and Kirk O'Shotts. RX4. 1960.
DD Spec 2.175. T1.L.2. OBSOLESCENT.
483mm x 222mm panel for mounting UN1/14, UN10/4. GPA/4A,
PS3/8 to provide a 4 wire terminating unit at small
stations. DD 1960. DD Spec 8.245, 2.169. OBSOLESCENT.
483mm x 222mm Panel for mounting 2 UN10/2, OS2/1, PS3/6
for VF ringing and is wired for ring/receive facilities on
2 lines. 1961. DD Spec 2.171. OBSOLESCENT.
483mm x l33mm Panel for mounting units constructed on
CHl/12A-D. Accessories include PN3A/2, PN3A/3, PN3A/3A,
PN3A/4. Superseded by PN3/23. G1. 1961. DD Spec 8.53.
DDHB 8.109. OBSOLESCENT.
483mm x l33mm panel for mounting
various combinations of the two.
CHl/12. Accessories include
PN3A/8 etc. Gl. SCPD 1961. DD
8 CHl/18C or 4 CHl/18D or
Can be modified to take
PN3A/5, PN3A/6, PN3A/7,
Spec 3.308. OBSOLESCENT.
Accommodates combinations of CH1/l2, CHl/18C and CHl/18D.
Replaced by PN3/23F. 1962. OBSOLESCENT.

99