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modifying blackstar ht pedals for bass guitar

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  • modifying blackstar ht pedals for bass guitar

    I own three different blackstar ht pedals (dist, distx and dual) and they all loose bass under ca 65hz with a steep slope. This i have meassured. More gain flattens the response which suggests that the highpass filtering takes place before the dist in the signal chain. Not very ideal for bass guitar. I checked the schematic for the ht dual but i cannot figure out where this filtering takes place. What i would like is for some kind soul to suggest a mod that would flatten bass response for preferably the ht dist since i use the two other ones for guitar duty.

  • #2
    Can you oh so kindly post a schematic?

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    • #3
      some of these may help
      Attached Files

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      • #4
        For some reason I can't load those schematics. Can you retry the upload? While you're at it, would you happen to have the schematic for the Blackstar HT-Boost?

        Thanks!!

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        • #5
          check on electrotanya, i have put them up there, also you can pm me & i can send them to you

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          • #6
            This scematic seems to be valid for the HT Dual. The meassured highpass slope is ca 24db/octave with -6dB at 65Hz. Hmm.. maybe it happens around the IC 3a/3b? The slope is allready there when signal enters the filter section-meassured. What software do you guys use to simulate circuits like theese?
            Click image for larger version

Name:	Blackstar DS-2 HT Dual.gif
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            Click image for larger version

Name:	Blackstar_DS-2_HT_Dual_Control_Board_sch.gif
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            Last edited by Dabba; 06-14-2013, 08:40 AM.

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            • #7
              Click image for larger version

Name:	Blackstar_DS-2_HT_Dual_Control_Board_sch.gif
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Size:	18.1 KB
ID:	829357
              ..And here is one for the control board
              http://www.diyitalia.eu/forum/downlo...6846&mode=view
              Last edited by Dabba; 06-14-2013, 09:41 AM.

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