4 Replies to “What’s this?”

    1. It’s the first stage of a range MosFET Range Booster. I pretty uninformed when it comes to the electrical engineering. But, if I understand correctly, C3 and POT1 will act as a variable boost for frequencies determined by the value of C3. Sort of a treble booster version of the SHO.

      I should probably add some diode protection to the MosFET.

  1. My mistake this is two boosters in series. It’s a Range Master and Sparkle Boost. The two switches turn each one on and off. The knobs on the left control the Range Master and the right are for the Sparkle Boost.

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