Service Manuals, User Guides, Schematic Diagrams or docs for : . Rare and Ancient Equipment CORNFORD Cornford MK50HII

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Cornford MK50HII


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                                                                                                                                                                                                                       Circuit design and
                                                                            MK50II Pre-amp                                                                        H.T. F
                                                                                                                                                                                                                       drawing by Martin
                                 H.T. G                                                                                                                                                                                  Kidd 25/01/11

                                                                      330 pF

                                                                                                                             100k                                                  100k
                               39k                                              250k lin
                                                              68k                                                                         .022                                                .033
                                                                                           0.33
                                                                                                   100 pF                                      470 pF
                           180k                                         0.1
                                       .0047                                                       1M log                                                                                               470
                      100 pF                                                    250k                                                                           680k                                                    470k
                                                              .033                                                                                                                                      pF
                                                                                 log

                                                 100k
            .033   68k                                                           25k lin
                                                                                                                                                               1M log                                         470k
                                                                                                                 2.2uF
                                                  4k7                                                                               1k5                                       15k
                   1 meg
                                        2N5462


              2.2uF       1k5
                                          .033
                                                          250k log
                                                                                                                 2N5462
                                          1 meg                                            1 meg         .033
Pin 2 on
6-pin DIN
 socket                                                                                                                                                                                                                       Low Current
             1k5                                                              H.T. E                     330 R                                                                                                                Green LED
                         330 R                                                                                                                                                                          1k5                     on Front
                                                                     220k                                                                                                                                                        Panel
                                        N.C.                                                                           0.1
           Low                   N.O.                                                                                                     100k
         Current
                 5 Volt
        Red LED                                                                                                         220 pF
                 supply                                                                                                                                          100k                                         1N4007
        on Front                                                                                                                                                           N.O.
          Panel                                                                                                                     250k lin
                                                                                                                         43k
                                                                                                                                                                            Relay 1B

                                                                                                                                    1M log       470k            15k
                                     Relay 1A                                                                                                                                                                                  Mute Send
                                                                                                                         0.1                                                                                                    Signal
                                                                                                                                                                           N.C.
                                                                                                                .033                                                                                                                0.1
                                                                                                                                                        25k
                                                        1k5                                                                                              lin
                                                                                                  100k                                 1 nF
                                                                                                                                                                                                     Front panel
                                                                                                                   25k lin                                                                             switch


                                                                                                                                                                                                              5 Volt
                                                                                                                                                                                                              supply            Pin 3 on
                                                                                                                                                                                  To Effects Send
                                                                                                                                                                                      Sockets                                   6-pin DIN
                                                                                                                                                                                                                                 socket
                                                                                                              Circuit design and
                                                                                                              drawing by Martin
                               MK50II Effects                                                                   Kidd 25/01/11

                                  Loop                                                   22k 



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