DD 1970. WITHDRAWN.
AM22 RESPONSE SELECTION AMPLIFIERS
Effects Response Selection Amplifier, used in Type-D
studio equipment to simulate telephone speech etc. Filter
characteristics similar to those in PEU/l. Comprises two
separate amplifiers. Insertion loss: OdB. Normal input:
DD Spec 3.458.
Response Selection Amplifier, LP Filter, used in Type-D
studio equipment. Frequency response characteristic are
similar to those of the filter sections of AMl/9. Used in
tandem with AM22/2 to simplify desk-mounted facilities.
CHl/27A. DD 1967. DD Spec 3.470. ACO. OBSOLESCENT.
Response Selection Amplifier, Stereo. Has 2 circuits,
similar to AMl/4, with ganged controls. Chassis l78mm x
54mm x l52mm. DD 1967. DD Spec 3.454. OBSOLESCENT.
Response Selection Amplifier of commercial design.
Improved version of AMl/ll. Provides lift and cut at 9
selected frequencies:- 100Hz, 160Hz, 320Hz, 640Hz, 1280Hz,
2560Hz, 5120Hz, l0240Hz. Comprises control unit 254mm x
l02mm x 95mm deep plus amplifier unit, 229mm deep, which
can be remotely situated. Complete device can be 483mm x
l33mm panel mounted or portable in carrying case.
DD 1967. OBSOLESCENT.
Response Selection Amplifier with OdB gain, giving top and
bass tilt and lift and presence with ganged controls for
stereo. Has bypass key. First used BH Continuity.
CHl/37A. DD 1969. OBSOLESCENT.
AM23 MATRIX AMPLIFIERS
Camera Overlay Conversion Matrix Amplifier used with EMI
2001 colour camera to provide a B-Y output for colour
separation overlay. Mounts on the monitor card of the
C.C.U. and powered from the C.C.U. power suppliers.
Printed board 76mm x 38mm. DD 1970. DDMI 8.401. ACO.