Tuesday 18 January 2022

Fulltone 2B

 Schematic is avaiable HERE.

Note that this is a buffered effect so the offboard wiring is a bit unusual.

 


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9 comments:

  1. Anonymous18 January 2022 at 23:29

    Are 1N750A diodes germanium? All the can see online is that they are 4.7V Zeners. The PedalPCB schematic just says GE. Is there a specific forward voltage drop range that the GE diodes need?

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    Replies
    1. tnt19 January 2022 at 20:34

      try 1n34 etc.. Or other germanium

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    2. Anonymous19 January 2022 at 21:57

      I have some 1N34s sitting around that I will use if I decide to build it. I'm just wondering if fuzzhead had a typo or if there is a specific reason he wrote 1N750A for the diode.

      Delete
    3. fuzzhead21 January 2022 at 08:06

      Reading the thread at FSB, they are unknown germaniums and the zener is for the LED indicator. Doh! I will update the layout ASAP.

      Delete
  2. Convergent Sound30 January 2022 at 21:06

    You can tag this verified. I used 1n34a's for d1-d2 and you can hear compression with the more extreme "dynamics" settings. I'm sure it's worth experimenting with diodes with lower forward voltages for these diodes and maybe auditioning different pot tapers for the Dynamics control. Pretty clean boost with a nice buffer.

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    Replies
    1. fuzzhead31 January 2022 at 20:06

      Thanks for verifying and the suggested mods.
      Tagged.

      Delete
  3. panayu10 February 2022 at 15:43

    how to do offboard wiring for this one?

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  4. Tom10 February 2022 at 19:15

    It’s buffered so the input and output won’t be routed through the switch. Input jack would literally go to your jack for example. Pin one on your switch is the top left pin. Pin two is the one below it. Think that’s right. Hope that helps.

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