EQ5/50l
EQ5/503
EQ5/503A
EQ5/510A
EQ5/510C
EQ5/511
EQ5/512
EQ5/513
EQ5/5l7
EQ5/518
EQ5/519
EQ5/520A
. 123 -
EQ5
EQ5 VIDEO FR:~QUENCY EQUALISERS
Portable Variable Equaliser used with TE1/502 to obtain
values of components for EQ5/503. Loss variable in 10
steps from 1dB to 20dB. DD 1957. DD Spec 6.68. ACO.
OBSOLESCNENT.
Fixed Equaliser w1th printed circuit on which appropriate
components are mOlnted for a particular line as determined
by tests with EQ5/50l and TE1/502. DD 1957.
DD Spec 6. 71. Ace. OBSOLESCNET.
As EQ5/503 but filted in metal box for mounting on PN3/2
panel. DD 1958. DD Spec 6.71. OBSOLESCENT.
Similar to EQ5/51U but constructed on printed circuit
board in CH1/12A ::or use" in EP1/ 504. Indexing pegs 17,
30. DD 1965. DD Spec 7.96. OBSOLESCENT.
Similar to EQ5/51) but fully equipped to equalise l80m of
PSF1/2. DD 1968. WITHDRAWN.
Variable Phase Eq;laliser used in EQ1/505. Provides phase
correction in 8 3witched steps at resonant frequencies in
megaherz intervale from 3MHz to lOMHz inclusive. CH1/12A,
pegs 9, 10. DD 1963. DD Spec 6.94. DDHB 6.48. ACO.
OBSOLESCENT.
Amplitude Equaliser and filter used in RC4M/503. CH1/1ZA.
DD 1965. WITHDlUWN.
Bode Equaliser used in EP8/50l, EP8/50lA. Provides either
positive or negative loss correction. Requires 45dB of
flat video gait to compensate for loss in equaliser
sections. 483mm x 267mm panel. DD 1965. DD Spec 6.109.
DDHB 6.73. ACO. OBSOLESCENT.
Chrominance Equaliser used in EQ12L/50l to provide
continuously va, 'iable gain or loss at chrominance
frequencies, w!1:h no phase errors, so as to remove
saturation fluctuations at the end of a video circuit.
CHl/12A. DD 196'. DD Spec 11.28. ACO. OBSOLESCENT.
Delay Line Equlliser used in EP1/505 for equalising
signals, after demodulation, from quartz delay lines.
CH1/l2A. DD 1967. WITHDRAWN.
Fine Trimming ~ine Equaliser used at the receiving
terminal of 625 line colour vision links for fine trimming
of gain, chromin3.nce/1iminance gain inequality and delay
inequality.
CHl/12A.
DD 1967.
DD Spec 6.140.
ACO.
OBSOLESCENT .
Cable Equaliser, 750, for correcting frequency response of
coaxial cable lines with loss of up to ldB at 4.43MHz,
equivalent to 5lm of cable PSF1/2 or 45m of PSF1/3. Box
60mm x 2lmm x 6Cmm. DD 1968. DD Spec 8.290. DDHB 8.255.
ACO. OBSOLESCE~T.

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