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Keith Raper Circuit PCB

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  • #46
    Originally posted by racer52 View Post
    hey there Thriller,
    just found this year old thread with the picture of a Roland CY-15 schematic.
    I planned on doing this over a year ago.. now that I finally built a 2 zone with choke, I am inspired and more confident in going for the DIY of a CY15r

    Got a question, who me? yeah me
    (Roland TD-20, will be using the TD-20 3zone inputs as used by the real CY12r/c or CY15r)
    - How much of more or less accurate is this? I may try to build a 3 zone for my TD-20 and could use something that is kinda like exactly accurate to help avoid any more mistakes than I need to endure.
    More or less looking for a more version than a less version. Do you have anything you can add to help - Thanks
    Racer, I have some info for you. Yeah you.

    I've never owned a TD-20 nor a CY-15R, but I've asked a couple (who knew what they were talking about) to verify that this diagram was accurate and it was approved. For diagram purposes, I literally connected grounds everywhere, when in a practical sense you can just connect the grounds wherever to eliminate unnecessary wiring. In fact, I feel that using a metal acoustic cymbal itself as the ground is the best route and is what I do for my A2E triggers nowadays.

    So I am seeing what you want to accomplish as adding a membrane switch for the bell/third zone, correct? I'll tell you... I personally think using a second piezo for the bell with a second input on the module yields the best results. The pros of the two-piezo build is superb bell sensitivity, and it is extremely consistent and reliable. The pros of the single-piezo "membrane" bell switch are you can choke the bell and you can use a smaller cymbal (16" diameter or less) without crosstalk issues.

    If going stealth, then it seems likely that one would want a more realistic ride size and the crosstalk issue with two-piezo method is not so much an issue. You can't choke the bell when using two-piezo method, but then there are not a lot of players who use bell-choking techniques anyway, including myself.

    If using a membrane switch bell method, some similar issues could arise that also occur with a pure-metal choke/edge switch, as in stronger strike velocity needed to activate the bell zone and potential warping of the metal. If you literally used a bell from a donor cymbal, then it seems mush less likely to distort over time, although it still may. And then the fit... the donor bell shape would have to be similar to the recipient bell shape for the contours to match up and get the tightest gap possible (for better sensitivity). To adhere it, you'd want the thinnest yet strongest tape i.e. KRT.

    I've thought of replicating an acoustic version of the CR-15R before, but went against it because of the same reason users complain about the actual CY-15R's bell sensitivity... even with the bell fix, it still can't rival the sensitivity of the two-peizo DIY A2E ride method. A membrane switch bell ride can be done, and I've seen it done elsewhere (mostly by Megadrum users), but I've never regretted not trying it myself and am quite happy with my two-piezo ride builds.

    Hope this helps you make some decisions. If I can be of further assistance, just let me know.
    sigpic

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    • #47
      Very helpful - thanks

      Well since I have a td20 I thought I might try to utilize the the inputs that it has for a 3 zone ride..

      I guese I could use the main input for the 2 zones and forgo the switch bell and use a piezo bell and plug into a free Aux port.

      We have a Roland 3 zone at our church - the bell fix was not performed on it and , just like the others, a light to medium tap does not trigger the bell.

      thanks for the info. looks like next week before I can get into production on this one. still need to finish my second 2 zone with choke... this time I am trying yet another variation of the top mounted edge/choke. I'll post in a new thread when I get it all together.

      Oh yeah - I must have listened to that tune (Charlie Brown by the Coasters) about 20 times since finding it the other day. ended up wasting half my day off digging on the net and listening to the tunes from the late 50's and early 60's
      TD-20 (non expanded), acoustic look DIY a to e conversion - some cake pan/ some crossbar method. DIY cymbals, VH-12 :-)
      .
      Psalm 150
      had the best times with this band https://www.facebook.com/SaintHooliganMusic
      YouTube video postings: https://www.youtube.com/user/racer52online/videos
      Vdrums Photo Albums: http://www.vdrums.com/member/26923-racer52/media

      Comment


      • #48
        Originally posted by racer52 View Post
        thanks for the info. looks like next week before I can get into production on this one. still need to finish my second 2 zone with choke... this time I am trying yet another variation of the top mounted edge/choke. I'll post in a new thread when I get it all together.
        You're welcome, my friend. Speaking of threads, I really need to update mine with the most recent modifications... I've been sitting on a pile of things to post when I can slow down on the home improvement stuff (like maybe 6 years from now ).
        sigpic

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        • #49
          SO how is this supposed to work?
          I'm confused?
          Roland TD-50, DW Collector's A2E kit, PD-140DS, CY-18DR, 2xCY-14C, 2x CY-8, 2x CY-5, VH-10, Modified MDS-12v

          TD-3 > TD-10E > TD-20 > TD/W-20 > TD-15 > TD-50

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          • #50
            I just happened onto this thread. Are the circuit boards still available for sale? If so please email me at dfab155@gmail.com

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            • #51
              Sorry, when the last batch of PCBs was used up in May 2016 I didn't make any more. To be economical I would need to make around 80 PCBs and the demand have been very small in the last few years.
              Keith Raper
              http://www.dtxpander.co.uk
              http://www.kdel.co.uk

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              • #52
                Would it be ok by You, Keith to build and sell the KRC module in an updated/improved design combined in a more multipurpose version?

                I think I recall some legal statements telling that the market was not able to use the design for any profitable purpose.

                Best regards

                Anders / www.zourman.com
                Pearl CrystalBeat and Sonor Safari, Roland CY-14/13R/15R/12CR, RT-10x,2xBT-1,VH-11/12/13 & KD-10, Quartz, Pintech Dingbat, Triggera D14,D11, ATV AD-h14, 120MHz MegaDRUM with PS board, 2box 5&3, dd4SE, TD-9, Addictive Drums 2.1.8. All ADpaks, Microsoft Surface PRO, Macbook, Pearl Throne Thumper, Zourman HH & Ride Conv Kit www.zourman.com

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                • #53
                  I am happy for people to make the circuit for sale either modified or not. I retained the copyright in case I wanted to commercialise it but that isn't going to happen now. If you want to run any ideas by me, please email me. I have worked on various versions of the circuit such as ones with adjustable gain in each channel to improve sensitivity and balance the signal levels. Some of these were sent to people to trial for me on Roland modules, others just stayed as tests on my Yamaha module.
                  Keith Raper
                  http://www.dtxpander.co.uk
                  http://www.kdel.co.uk

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                  • #54
                    Aha,

                    Then I see some opportunities here!

                    Keith, I will mail you!

                    Best regards

                    Anders / www.zourman.com
                    Pearl CrystalBeat and Sonor Safari, Roland CY-14/13R/15R/12CR, RT-10x,2xBT-1,VH-11/12/13 & KD-10, Quartz, Pintech Dingbat, Triggera D14,D11, ATV AD-h14, 120MHz MegaDRUM with PS board, 2box 5&3, dd4SE, TD-9, Addictive Drums 2.1.8. All ADpaks, Microsoft Surface PRO, Macbook, Pearl Throne Thumper, Zourman HH & Ride Conv Kit www.zourman.com

                    Comment


                    • #55
                      Use keith at kdel dot co dot uk
                      Keith Raper
                      http://www.dtxpander.co.uk
                      http://www.kdel.co.uk

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                      • #56
                        Fond memories of Keith, who featured in the first edition of digitalDrummer (see https://issuu.com/digitaldrummer/doc...r_january_2010 -- page 39).
                        . digitalDrummer
                        Review index

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