FL2
FL2/549A
FL2/549B
FL2/549C
FL2/549D
FL2/550
FL3/l
FL3/2
FL3/3
FL3/4
FL3/5
FL3/6
FL3/7
FL3/8
FL3/9-l4
134-
UHF Bandpass Filter (Band V) a single channel 2 element
comb line filter tunable over the range 6l8MHz-835MHz.
Construction similar to F~2/534 series, two TNC sockets.
DD 1972. DDMI 5.239. OB;;QLESCENT.
As FL2/549A, but with
DDMI 5.239. OBSOLESCENT.
two BNC sockets. DD 1972.
As FL2/549A, but with :wo type N sockets.
DDMI 5.239. OBSOLESCENT.
DD 1972.
As FL2/549A, but with onl~ type N socket and one TNC
socket. DD 1972. DDMI5.239. OBSOLESCENT.
UHF Bandpass Filter, as FL2/537A but with
elements instead of four. Designed for use
equipment when synthedser is provided.
OBSOLESCENT.
six tuning
in OB link
DD 1972.
FL3 HIGHPASS F[LTERS
Used with Lorentz HF louispeaker unit LPH65 on LSU/10.
Originally coded FB/!. DD 1956. OBSOLESCENT.
Used on PA6/12. Simi1ar:o FHP/3A but operated by relay
contacts. DD 1960. DD S')ec 2.155. TLL3. OBSOLESCENT.
Designed for Tatsfield to provide attenuation below l32c/s
switched
in or out by
r~lay.
DD 1961.
DD Spec 2.166.
OBSOLESCENT.
Band II
DD 1965.
Used on BA13!9.
filter former1:r coded 75H22.
OBSOLESCENT.
Microphone Filter to cut bass response. Eddystone box
with plug and socket conn,~ctions, listen jacks, selection
switch and 2~F capacitors. DD 1965. WITHDRAWN.
Used on PAlM/51. CHl/18C. DD 1965. WITHDRAWN.
Used in
CH1/l8C.
PAlM/50
DD 1965.
above
2300c/s.
to piSS frequencies
WITHD~WN .
500~ Balanced Highpass Filter used with FL4/23 in MN2M/4,
5 on 10kHz lines. Cut off frequency: 9.5kHz. Replaces
FL2/6.
CH2/2.
DD 1967.
DD Spec 5.148.
ACO.
OBSOLESCENT.
Similar to FL3/8 but with cut off frequencies of 10.5kHz,
ll.5kHz, 12.5kHz, 14. 5kHz , 7.5kHz and 8.5kHz respectively.
Used in conjunction with FL4/24-29. DD 1969.
DD Spec 11.106(70) FL3/1l, 11.107(70) FL3/l2, 11.89(70)
FL3/13, 11.108(70) FL3/14. ACO. OBSOLESCENT.

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