Sc2 v1.07 rear output knob V1

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Home Forums Ask Ted Sc2 v1.07 rear output knob V1

Viewing 15 posts - 16 through 30 (of 31 total)
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  • #15865
    Avatarsupafuzz
    Participant

      Thanks Ted…that gives us another avenue to explore.

      I’ll keep you posted!

      #15866
      Avatarsupafuzz
      Participant

        HI Ted

        would you be kind enough to send a flow chart and schematic to my e-mail?

        we dont think it’s the leds or cell and want to check the chips out next.

        We want to swap the left and right chips to see if the problem follows. And it is a 9db difference when compressing

        only. signal passes evenly when it’s bypassed

        #15867
        Ted FletcherTed Fletcher
        Keymaster

          I will send the circuit information direct to your email.

          #15868
          Avatarsupafuzz
          Participant

            Thanks!

            #15869
            Avatarsupafuzz
            Participant

              We replaced most of the chips and the problem persists. It may be one of the light sensors

              #15870
              Ted FletcherTed Fletcher
              Keymaster

                I pointed out in my posting yesterday that if the compressor is working at all, then the problem is the gain cells, there is no point in changing chips.. The type of gain cell is ORP12 and these are available in the US or from me.

                #15871
                Avatarsupafuzz
                Participant

                  Yes you did point that out. We were just in a chip changing kind of mood I guess!

                  #15872
                  Avatarsupafuzz
                  Participant

                    ok I’ll take a pair please..how do we proceed?

                    #15873
                    Ted FletcherTed Fletcher
                    Keymaster

                      OK, will email.

                      #15874
                      Avatarsupafuzz
                      Participant

                        Ok we installed the light sensors and we still have exactly the same issue..a 9 db difference in channels.

                        So we tried everything we could think of and now..I guess I have to send it to England.

                        Please advise

                        #15875
                        Ted FletcherTed Fletcher
                        Keymaster

                          I’m sorry that you still have the problem….. it’s such a pain to have to send it over to me….. But I’m very happy to fix it if it is still broken.

                          Just send it to me at The Sound House, Hunsdon Road, Torquay TQ1 1QB, UK.

                          Make sure to mark it as equipment returned to manufacturer for servicing (not strictly accurate, but who cares!) And put a low value on it to avoid any possible problems with customs.

                          I will be in touch by email :(

                          #15876
                          Avatarsupafuzz
                          Participant

                            Ok thanks..I’ve run out of options here….Please e-mail me I have another question.

                            #15877
                            Ted FletcherTed Fletcher
                            Keymaster

                              To other readers of the forum….. I will post the results of this one once I have looked at the SC2.

                              #15878
                              Avatarsupafuzz
                              Participant

                                Hi Ted I need to talk you you in a private message

                                thanks

                                #15879
                                Ted FletcherTed Fletcher
                                Keymaster

                                  Just a note of caution about the early SC2 compressors….. The LDRs (Light Dependent Resistors) used to produce the compression do have delicate termination wires and can break. The cells can also deteriorate eventually (although I’m using some that have been in service for nearly 50 years… so they are not that bad!)

                                  The electronics in these compressors is quite basic and rugged and the most likely cause of any defect is the gain cells (LDRs)

                                  L/R gain differences are often noted and these are caused generally by inequalities in the tracks on the gain controls, usually the input gain control. :)

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