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Unlocking the Yamaha E70

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  • AdamStan

    I really enjoy these pieces, having recently discovered your videos after seeing your posts for a couple years. Never heard of Blackmore's night till a week ago. I didn't notice there's something is up with your hand. I hope it hasn't caused you too much trouble. It seems you're over any problems that might be presented by playing.

    Totally emotive and engaging. My goal with arts and I wasn't sure an organ could do it especially a D85.

    Mark
    Last edited by mseven; 04-27-2013, 11:17 PM.
    Mark Sutin

    Comment


    • Originally posted by keyman2 View Post
      ...Otherwise, I didn't know Yamaha used recycled wood? : )
      I was wondering what kind of Anthrax or human body parts or medical waste might have been in the box or crate Yamaha used to construct that portion of your organ, member mseven. Yikes! I mean "BIOHAZARD" is pretty specific stuff.
      1962 A102 - Marshall powered 1965 Leslie 251 - 1955 M3 that is for sale
      Emerson-Smith-Dennerlein-Jobson-Walsh-(Jon) Lord enthusiast and typical rock-hack player.

      Comment


      • I would hazard a guess that it was something added on after the fact? (pun intended)

        Originally posted by M3me View Post
        I was wondering what kind of Anthrax or human body parts or medical waste might have been in the box or crate Yamaha used to construct that portion of your organ, member mseven. Yikes! I mean "BIOHAZARD" is pretty specific stuff.

        Comment


        • Lol yes, sorry, photoshop! Just my comment on those jacks underneath
          <img style="width:300px;border:1px solid black;" src="http://img443.imageshack.us/img443/4964/dsc04738bt.jpg" >
          Last edited by mseven; 04-28-2013, 10:29 AM.
          Mark Sutin

          Comment


          • Originally posted by keyman2 View Post
            Good to know about the D-85, it has more than enough coupling already though, no? there was the other fellow on the list that tried to directly bridge the D-85 keyboards, too bad it took out the keyscanner - though I think he ended up chopping it.....
            Close but not quite, Ive broken and fixed those quite a few times since then :D
            I did bridge two keyboards but did it the strictly mechanical way:
            Click image for larger version

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            And a bad pic of it in the corner, quite a bit gone undocumented to it since then.
            Click image for larger version

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            Currently I thought I had messed up again when changing the PSU, but was using a stupid switching supply that didnt work.
            The problem Im facing now is that it needs a 0V for the chips (not ground, but 0V potential or whatever you call it) aaaand although I got a proper linear supply, guess what, It doesnt have ground out, so Ill have to find it on the circuit ...
            Not doing that until Ive added a proper switch and fuse in front, but if someone clever could confirm that I can use the point before ground where both +/- 15v are grounded, or point out an alternative, that would be nice :)
            Picture: Click image for larger version

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            Its mostly stubborn pride at this point, its been over a year, most of that looking at problems incomprehending, and I cant say I feel much smarter doing things like hunting for ONE single faulty tantalum cap (not knowing thats the problem of course) for three months. And the keyscanner ... placed the connections for the oscillator out on a metal rail, was fine really, that took a month as well.
            And so on.
            Even though I get there in the end, its so little to learn at a time when everything is so much over my head, buuut every time it does work, and I can patch in an LFO to the filter that I couldnt before, it is great.
            I suspect many things sound greater, but I did it and so it is great :)
            And Marc was the inspiration, so thanks.
            Last edited by David Børresen; 04-28-2013, 11:47 AM.

            Comment


            • David I see what you did there with the D-85! That's great

              Are those control knobs across the top?

              <img style="border:1px solid black;" src="http://img4.imageshack.us/img4/5083/d85megaconsole.jpg">
              Mark Sutin

              Comment


              • Yeah, but thats an older version of the knob layout from months ago, I redid that whole panel, boxed in the drumbit and prettied things up.
                Ive got speed and depth for the vibraphone, speed for chorus, Filter controls for Special/Custom and Bass, Rerouting of bass voices by patching any one or two into the 2 bass filters (done by simple switching minijacks).
                CV in for Special Voice and Attack voice VCAs and Filter Cutoffs everywhere.

                The monosynth I actually havent modded yet as it requires more carefull planning, the top one has so far been the prototype.
                Next up is on hold until I get the PSU working, but I will tap the Key on signals for Bass and Special and use a simple circuit to change the S-Trig to V-Trig so I can sync external envelopes and such to the filters and amps (I did get an expert sleepers module and MFB double envelopes and LFO for this purpose).

                Besides that its not so much modifications as its simple routings into the D85 and a few internal trimpots brought outside.
                Still more than enough opportunities to mess up :D
                Might look at changing some values to get better ranges later, but there is limit to how adventurous I want to be when I can be playing instead or finishing other stuff.

                Comment


                • Phew, you almost started up a whole side thread on that.... : )


                  Originally posted by mseven View Post
                  Lol yes, sorry, photoshop! Just my comment on those jacks underneath
                  <img style="width:300px;border:1px solid black;" src="http://img443.imageshack.us/img443/4964/dsc04738bt.jpg" >

                  Comment


                  • Egads, not only chopped, but stacked as well! : )

                    The solo synth is similar to a CS-5 but having digital control of envelope and presets. You could have control of the related parameters through your external devices (computer coupled or separate hardware). Otherwise, the D-85 has just the one CS VCO, but a whole slew of CS style filter chips. If you coupled the solo synths, you could have something more like a CS-20 (minus the preset memory)....

                    As always, the ideas come easily versus the implementation....

                    Yeah, but thats an older version of the knob layout from months ago, I redid that whole panel, boxed in the drumbit and prettied things up.
                    Ive got speed and depth for the vibraphone, speed for chorus, Filter controls for Special/Custom and Bass, Rerouting of bass voices by patching any one or two into the 2 bass filters (done by simple switching minijacks).
                    CV in for Special Voice and Attack voice VCAs and Filter Cutoffs everywhere.

                    The monosynth I actually havent modded yet as it requires more carefull planning, the top one has so far been the prototype.
                    Next up is on hold until I get the PSU working, but I will tap the Key on signals for Bass and Special and use a simple circuit to change the S-Trig to V-Trig so I can sync external envelopes and such to the filters and amps (I did get an expert sleepers module and MFB double envelopes and LFO for this purpose).

                    Besides that its not so much modifications as its simple routings into the D85 and a few internal trimpots brought outside.
                    Still more than enough opportunities to mess up :D
                    Might look at changing some values to get better ranges later, but there is limit to how adventurous I want to be when I can be playing instead or finishing other stuff.

                    Comment


                    • Originally posted by mseven View Post
                      David I see what you did there with the D-85! That's great

                      Are those control knobs across the top?

                      David wins!
                      1962 A102 - Marshall powered 1965 Leslie 251 - 1955 M3 that is for sale
                      Emerson-Smith-Dennerlein-Jobson-Walsh-(Jon) Lord enthusiast and typical rock-hack player.

                      Comment


                      • Very interesting. I gotta say the panel for me is being a big challenge.

                        Speed and depth on the vibraphone hmm.. And your bass filters and other filters are something you've made and added in?

                        And CV I still don't really understand alhough its everywhere. Gotta do more research. What does it do for your amplitudes and filter cutoffs? Where does this CV come from?

                        You're controlling only the Bass and Special because these are all you could access and / or because they are monophonic?

                        Bringing internal trimpots outside has also got me wondering what other gems, say on the E, that might reveal.

                        Fascinating

                        Yeah, but thats an older version of the knob layout from months ago, I redid that whole panel, boxed in the drumbit and prettied things up.
                        Ive got speed and depth for the vibraphone, speed for chorus, Filter controls for Special/Custom and Bass, Rerouting of bass voices by patching any one or two into the 2 bass filters (done by simple switching minijacks).
                        CV in for Special Voice and Attack voice VCAs and Filter Cutoffs everywhere.

                        The monosynth I actually havent modded yet as it requires more carefull planning, the top one has so far been the prototype.
                        Next up is on hold until I get the PSU working, but I will tap the Key on signals for Bass and Special and use a simple circuit to change the S-Trig to V-Trig so I can sync external envelopes and such to the filters and amps (I did get an expert sleepers module and MFB double envelopes and LFO for this purpose).

                        Besides that its not so much modifications as its simple routings into the D85 and a few internal trimpots brought outside.
                        Still more than enough opportunities to mess up :D
                        Might look at changing some values to get better ranges later, but there is limit to how adventurous I want to be when I can be playing instead or finishing other stuff.
                        Originally posted by M3me View Post
                        David wins!
                        Lol looks like it!
                        Mark Sutin

                        Comment


                        • Finally finished a panel properly measured. This is from the back, rendered in Sketchup, ready for the cnc guy. It will be three identical upper/lower/pedal panels, with two end pieces for the Coupler etc on the right and LFOs on the left. Or something like that.

                          <a href="http://imageshack.us/a/img543/5961/panelsection.jpg" target="http://imageshack.us/a/img543/5961/panelsection.jpg"><img src="http://imageshack.us/a/img339/723/panelsectiont.jpg" style="border:1px solid black;"></A>
                          Mark Sutin

                          Comment


                          • Its because/where they use the Yamaha IG155/6 filter chips Ive added CV.
                            I havent made anything at all, just added some connections and moved some pots.
                            Its the same filters used in the CS series so it was well documented, same thing with the VCA, those are the IG151.
                            Ranges are normal 5V
                            All I had to to was lift and route one line through a switching jack socket (if I insert a jack, the connection through is broken) and add a resistor (only because I saw they did it when modding the CS5 for filter input, dont ask me why, but I tried it first on my CS5 and it worked fine.) and theres the CV input done.

                            What I can do is replace the envelopes for the filters and amps, or add modulation, but I need external modular gear that produce those envelopes and such to do it.
                            But most important now is the PSU, anyone able to help?

                            And mseven, those panels are going to look great!

                            Comment


                            • David, I looked at this but really I can't give you a honestly confident answer. It looks like it might work but that ain't good enough! It has also been pointed out to me that my own plans for tapping power supply were approaching dangerous territory, at best.

                              The problem Im facing now is that it needs a 0V for the chips (not ground, but 0V potential or whatever you call it) aaaand although I got a proper linear supply, guess what, It doesnt have ground out, so Ill have to find it on the circuit ...
                              Not doing that until Ive added a proper switch and fuse in front, but if someone clever could confirm that I can use the point before ground where both +/- 15v are grounded, or point out an alternative, that would be nice :)
                              Picture: [ATTACH=CONFIG]9653[/ATTACH]
                              Yeah! The panel will rock... it better after 20 months! lol

                              Thank you for the tip about the IG156 chips and such. Very interesting, and resulted in a googling which brought up some valuable information and other pages in this thread. Now re-reading this thread is showing a ton of great info from all the past posters, whom I hope are still lurking, ready to jump in.
                              Mark Sutin

                              Comment


                              • What's your aim on the power supply? To replace both with a common source or fix a broken one? You obviously can leave out all the related power amp electronics on the 2nd D-85, unless you're looking to create a stereo Leslie (too late if you've chopped it?). You can sum in the extra D-85 audio with the existing one... (I'm doing that on a related project).

                                Otherwise, you have to be careful about coupling noise into the analog circuitry if you're using switching supplies (like a PC computer typically provides +12V, +5V at high current). They would have to have a single point common ground with the analog circuitry and filters to avoid ground loops and coupling high frequency switcher noise etc. Linear supplies are much quieter, but less efficient and larger/hotter, typically voltage regulators with auxiliary power transistors on heatsinks (like the current supplies on the E-70 etc.). Otherwise, you can get higher power hybrid voltage modules like they've used on other designs ($$?).

                                You would have to include additional current/power capacity to be sure they meet requirements. I don't know if there's any special protection circuitry (current limiting) other than fuses, or if there's power sequencing where one supply comes up before another?

                                In any case, first thing is to review your power requirements... voltages and currents.

                                Its because/where they use the Yamaha IG155/6 filter chips Ive added CV.
                                I havent made anything at all, just added some connections and moved some pots.
                                Its the same filters used in the CS series so it was well documented, same thing with the VCA, those are the IG151.
                                Ranges are normal 5V
                                All I had to to was lift and route one line through a switching jack socket (if I insert a jack, the connection through is broken) and add a resistor (only because I saw they did it when modding the CS5 for filter input, dont ask me why, but I tried it first on my CS5 and it worked fine.) and theres the CV input done.

                                What I can do is replace the envelopes for the filters and amps, or add modulation, but I need external modular gear that produce those envelopes and such to do it.
                                But most important now is the PSU, anyone able to help?

                                And mseven, those panels are going to look great!

                                Comment

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