Alice ACM Console

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  • #15319
    AvatarBluespills
    Participant

      Alice ACM Console 1

      Alice ACM Console 2

      Hey Ted, I am buying this Alice console. I am wondering if you know what kind of multipin connectors these are that it uses, and if it’s still possible to find these connectors. I am guessing you don’t have any pinout information??

      best
      Zack

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      #15939
      Ted FletcherTed Fletcher
      Keymaster

        Hi Zack,

        apologies for a slow reply, I’m normally very fit but perhaps age is catching up!

        That is a monster of a console! It’s clearly a radio production console; we built them for a number of stations in the 1980s. It has a fortune in PPMs!

        Not sure what those connectors are… the panel may not be original!! The connector types that we used were either ‘EDAC’ or ‘cinch’ and they are still available from RS and Farnell…. I do recognise that type and it’s odds on that they are still around today. :)

        On closer inspection… the panel does look original, but I certainly don’t have any info on pinouts. Suggest a hunt through the RS catalogue…. I have had a look in CPC and drawn a blank. :(

        #15940
        AvatarBluespills
        Participant

          Hey Ted, thanks for the reply. Here’s an update. I’ve got the mixer home now and it’s working nicely. Miraculously I’ve located the pinouts for the multipins and the patchbay. The only thing I’m a bit confused about, is I can’t seem to find the master module output, to go to my studio monitors. I assume the channel strip with the red fader and Echo returns is the master output? Right now I’m just using group modules 1 and 2 as my output… Any ideas? Am I missing something really simple? I can send you the documents of patchbay and pinouts if that helps. But the image was too big to upload here.

          Best regards

          Zack

          #15941
          AvatarBluespills
          Participant

            Here is the diagrams i have!

            Alice ACM Console 3

            Alice ACM Console 4

            Alice ACM Console 5

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            #15942
            Ted FletcherTed Fletcher
            Keymaster

              The control room monitor outputs would normally appear as XLR outputs on the rear on an ACM.

              It’s possible that there is not a ‘main stereo’ output…. on a number of those consoles there was only the main group outputs for recording.

              You were very fortunate to get hold of all that documentation with it! I have no information at all on these, only the recollections of how I designed it in the first place! 😯

              At least there is one puzzle solved… it was originally built for BRMB in Birmingham.

              #15943
              AvatarBluespills
              Participant

                Hey Ted, thanks again for such a fast response! Ok I’ve just seen next to the xlr connectors on the back, someone has written on a piece of tape “MON o/p’s 1-gnd 2-L 3-R” so I guess this maybe could be the main output is wired to a single xlr connector with the left channel on pin 2 and right channel in pin 3. I’ll try hooking it up this way and see what happens. :) otherwise perhaps like you said it just uses the group outs, but it seems like there should be a master out since the red fader on the “echo master” module seems to do nothing..

                Either way this mixer is awesome! I’m looking forward to getting to know it better !

                Best

                Zack

                #15944
                Ted FletcherTed Fletcher
                Keymaster

                  That’s it! I had forgotten that it was common practice to use a single XLR for the monitor outputs. :(

                  #15945
                  AvatarBluespills
                  Participant

                    Hey Ted! I’ve recently gotten around to doing some work on my Alice ACM console. First of all I love it, the sound is great! I have started replacing a lot of the old Electrolytics and have rewired all the multi connectors.

                    I have a couple troublesome channels, and I believe it could be faulty op amps. I have a lot of tl071 op amps here. Would these work as a drop in replacement for the mc1741cp1 op amps that are in there now, without causing any trouble?

                    #15946
                    Ted FletcherTed Fletcher
                    Keymaster

                      Those TL071 should work OK as direct replacements for the old 741 ICs. The TL071 is a much ‘faster’ chip and it’s possible that there might be a stability issue, but I suggest it’s worth a try. Nowadays I always fit IC sockets so that I can try different replacements. But in terms of performance, you probably won’t gain anything except possibly a small improvement in noise performance. :)

                      #15947
                      AvatarBluespills
                      Participant

                        Thanks ted, I’ll give it a try. How do you fit the IC sockets so that its stable to try different replacements? I am good with a soldering iron, and it could be fun to experiment on a couple channels. :)

                        #15948
                        Ted FletcherTed Fletcher
                        Keymaster

                          Two separate issues…. fitting IC sockets is always a good move so that you can quickly unplug and plug in ICs.

                          The stability issue can be very complex; to fix any instability that’s caused by fitting faster ICs is usually done by restricting the gain at high frequencies, by fitting a low value capacitor between -ve input and output of the IC, but I would not worry about that….. it’s most likely that fitting TL071 will be OK and not cause problems.

                          #15949
                          AvatarBo Hansen
                          Participant

                            Hi Zack,

                            I’ve just been registered on this forum, and saw your post right now.

                            This Alice ACM console you show in the picture, I bought in England in the mid-1980s.

                            I renovated it and made some modifications in the signal path, etc.

                            Then I sold it to a studio in Trollhättan, Sweden, where it is used with a Ampex MM1100 16 channel taperecorder.

                            After this time, I believe this console had about ten owners here in Sweden.

                            The multi connectors is made by Plessey, but I don’t have the type number.

                            –Bo

                            http://www.hansenaudio.se

                            #15950
                            AvatarLoui
                            Participant

                              Hello!

                              It so happens that this very Alice mixer is now owned by a friend of mine and will soon make it to our studio. Very thrilled about that and it’s interesting to read up some of it’s history here.

                              Ted, you attached a signal flow diagram earlier in this thread but unfortunately the resolution is poor. Would it be possible to to attach one with a higher resolution, or maybe you could e-mail it.

                              Greetings!

                              Loui

                              #15951
                              Ted FletcherTed Fletcher
                              Keymaster

                                I’m really sorry that I have no further info on this console…… I have no diagrams at all. 😥

                                #15952
                                AvatarLoui
                                Participant

                                  Reading this thread again I see it was Zack who posted the diagrams.

                                  I’ll try and get hold of him.

                                  Thanks for checking though Ted :)

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