Vintage Simmons Drums (UK) Users Group

You are right. There are two primary coils. I don't know if the two coils are between white/white and brown/brown or a mixture (each coil brown in/white out), but you can measure that out with an ohm-meter. For 120V connect the two ins and the two outs and attach them to the primary input on the PSU board. The coils will be in parallel now instead of in line, meaning double ampere with half volts.

This is only working with the single toroidal transformer, not with the version with two transformers.


  ----- Original Message ----- 
  From: Nick Zampiello 
  To: Simmons_Drums@yahoogroups.com 
  Sent: Monday, September 30, 2013 8:49 PM
  Subject: Re: [Simmons Drums] RE: Simmons SDS6 power question


    

  i've got one toroidal.

  there's a piece of tape inside with 115 crossed out and 230 written next to it.  like it was changed to be 230 at some point.

    the tranny in my sds6 has two sets of brown/white wires.  one set goes to the primary points on the psu.  the other is tied together.


  thanks in advance!


  SN is 105 i believe.


  one of the last! but not midi.  OS 44E 44F


  z






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------------------------------------------------------------------------------
  From: Michael Buchner <buchnerelectronics@...>
  To: "Simmons_Drums@yahoogroups.com" <Simmons_Drums@yahoogroups.com> 
  Sent: Monday, September 30, 2013 2:43 PM
  Subject: Re: [Simmons Drums] RE: Simmons SDS6 power question



    
  You have the version with a single toroidal transformer or with an additional small second one?

  Von meinem iPhone gesendet

  Am 30.09.2013 um 20:10 schrieb Nick Zampiello <newallianceeast@...>:


      
    cool so the tranny in my sds6 has two sets of brown/white wires.  one set goes to the primary points on the psu.  the other is tied together.





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    From: "warlandr63@..." <warlandr63@...>
    To: Simmons_Drums@yahoogroups.com 
    Sent: Monday, September 30, 2013 12:55 PM
    Subject: [Simmons Drums] RE: Simmons SDS6 power question



      
    All of the toroidal transformers I have seen in Simmons gear are multi tapped on the primary. (keeps cost and
    stock holdings down to do it this way) For the most part, in the later years they used the same transformer in all their designs again I guess for the above reasons. I haven't got any units open at the moment so I can't quote what colors are what (maybe someone else can). I will say that they tend to operate at their maximum power output ratings which tends for them to run rather warm (hot in some cases) This leads to insulation failures and PSU faults. I know as I kept a local transformer rewinder very busy quite a few years back. Every second unit in for fixing had a dud tranny.

    If you are in the US and go for the step-up external transformer, please do ensure you get one rated with a high enough "continuous" output current.

    Richard



    ---In simmons_drums@yahoogroups.com, <newallianceeast@...> wrote:


    Hey synth drummers!


    is there a transformer tap in the SDS6 to switch between us/uk voltage>?


    wondering if it needs a power transformer to become US.


    z

    NEW ALLIANCE EAST!!!!

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