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Summary of Contents for Acoustical Manufacturing Co. QUAD MULTIPLEX DECODER
- Page 1 INSTRUCTION BOOK QUAD MULTIPLEX DECODER...
- Page 2 ACOUSTICAL MANUFACTURING CO., LTD. HUNTINGDON HUNTS. ENGLAND 2561/2 TELEPHONE: TELEGRAMS: ACOUSTICAL HUNTINGDON Issue 2 I m/1 0/...
- Page 3 THE QUAD MULTIPLEX DECODER The QUAD multiplex decoder is designed specifically for use with the QUAD FM tuner and QUAD 22 control unit. Its internal mono-stereo electronic switching is operated remotely from the QUAD 22 controls. It may.
- Page 4 lNSTALLATION Connect the Brown audio lead via a 2.,2K resistor (Dubilier BTT or equiva lent) to pin 5 of valve V6 (6AL5). Keep Preparing the FM Tuner the resistor close to pin 5 (see fig 2). If the Serial No. of the Quad FM tuner is above 19062 a switch is fitted near V6 (see fig.
- Page 5 SER.No. F.M. TUNE.R A80\JE SE.A:. No. l'tOIo2. QUAD FM. TUNE.R BELOW \'lOb� �UAD • POSITION OF SI WHEN TUNER IS USE.D WITH MUL.. T IPL.E.X DE:COOE.R. Page 4...
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Page 7: Operation
OPERATION SPECIFIC A TION Mono De-emphasis: Press RADIO and MON or 2-MON push buttons. All transmissions \\-ill be heard from 500S (European standards) the tuner in the normal way. Stereo broadcasts 750S (North American standards) will be heard in their mono form, i.e. left and righthand channels added tog(;ther. -
Page 9: Alignment Procedure
ALIGNMENT PROCEDURE Notes: Each unit is fully aligned at the factory before despatch and alignment should not be required on installation. Should subsequent re-alignment become necessary the following procedure should be followed. The decoder must be aligned with the printed board securely in position inside its cover. Access to the unit is through the cover holes. - Page 13 MULTIPLEX DECODER COMPONENTS LIST Component Stock No. Maker's Reference Tolerance Reference Value 200/A ± 100/0 Dubilier BIT lOOK 205/B ± 100/0 Dubilier BIT 224/C ± 10 % Dubilier BIT 244/B ± 10% Dubilier BIT 3.3K 253/A ± 10 % Dubilier BIT 1.8K 280/C ±...
- Page 14 Component Reference Value Tolerance Stock No. Maker's Reference 217JD 7%TE Welwyn F20 228JE 7%TE Welwyn F20 ± 7%TE Welwvn F20 228JE ± 7%TE Welw n F20 21O/E ± 7%TE Welwyn F20 21O/E ± Welwyn F75 208/N ± Welwyn F75 208/N ±...
- Page 15 Component Value Tolerance Maker's Reference Stock No. Reference TCC PMX 4 495/F . 1 1L ± 20% TCC 50V E.1072/8 482/A 4 1L Hunts BD11A 513/E C1 8 * 4000p ± 10% Hunts BD72A 509/B C18t 5600p ± 10% TCC 25V E.1072 f7 465/G 2 5 1L TCC Metamold M.974/9...
- Page 16 �uarantee T his instrument is guaranteed against any defect in materiaL or workmanship for a period of twelve calendar months from the date of purchase. Within this period we undertake t o supply replacements free of charge ior any parts excepting valves (which are covered by the makers' guarantee of three months) which may prove on examination to be defective, provided that such defectiveness is not the result of misuse (including use with unsuitable ancillary equipment), accident or negligence, and further that the instrument was purchased at the proper consumer price...
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