Thursday, 3 January 2013

Dan Armstrong Purple Peaker

Another addition to Dan Armstrong library, The Purple Peaker treble booster. This layout is using two SPDT switches instead of the original setup. You could get closer to the original with using 2PDT, taking the ground to pins 2 & 5, Lo wire to pins 1 & 3, and finally Hi to pin 5 - leaving pin 4 unconnected. Personally i would still go with two individual switches... (Yup i know it's the same text i used for the Yellow Humper :))


  1. I built this last year and forgot to post. I'm pretty sure it worked as is, so will go out on a limb and say tag it!

    1. Cheers Ian!

      It is pretty much the same circuit as the verified Yellow Humper.

    2. Can u upload a Video ? i want to make it too but i wanna know how does it sounds like

  2. Even more useful to ditch the switches and use 2 pots. A50K works good for low.. you need something a bit lower resistance for High.. I've got an A100 in parallel with a resistor to have it down to 40K but there is still a little 'buzzing' when turned all the way up....