- 145 -
DD 1971. DD Spec 3.565. OBSOLESCENT.
Equaliser/Crossover Splitting Filter used in LS3/6A.
RD 1971. OBSOLESCENT.
Loudspeaker Splitting Filter, used in LS3/7.
Television Splitting Filters used on 12Mc/s-18Mc/s carrier
system, one at each end, to enable a video frequency
channel of OMc/s-3Mc/s to be used over the same cable.
140mm CH/39 chassis. Originally coded FI6/501A and
FI6/501B. DD 1957/59. DD Spec 6.64. OBSOLESCENT.
Similar to FL6/50lA and FL6/501B but mounted on 140mm
pan-type chassis CH3/1B. Originally coded FI6/501C and
FI6/501D. DD 1957/59. OBSOLESCENT.
Used in place of FL6/50lA and FL6/501B where a
of 5.5Mc/s is required for 625 line monochrome
signals over the same cable as a 405 line signal
l2Mc/s-18Mc/s carrier. 140mm CH/39.
DD Spec 6.88. OBSOLESCENT.
b andwid th
Used for INl/l at Bush House. DD 1956. OBSOLESCENT.
Distribution Frame with 10 Jumper Rings No. 12 and 5 No.
28 or 27 and provision for 5 PO connection blocks plus 5
more blocks or fuse mountings. Supersedes DF/3. DD 1957.
Framework used for INl/3. DD 1958. OBSOLESCENT.
UHF Amplifier Framework for mounting 12 AM14/5l5 or
similar units. Not usable alone but can be screwed to any
chassis in the CH3/l series or to a flat panel of
UHF Amplifier Framework, to accommodate up to twelve
chassis type CHI/57 or similar units. Can be screwed to
any chassis in CH3/l range or to any flat panel of
appropriate size. Dimensions: 432mm x 136mm x 105mm.
DD 1971. OBSOLESCENT.