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Permalink Reply by Jon on January 26, 2020 at 2:55am

Anyone who has Alfred E  Newman as their picture has a one check in the good column :-)

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Permalink Reply by BrianQ. on August 21, 2021 at 8:00am

Transistor for the Treble Boost has been obsolete for decades, use 2n2222, BC547, 2n3904. any NPN with 300-350 hfe, watch out, BC series has different pin out

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Permalink Reply by BrianQ. on August 21, 2021 at 11:19am

The Germanium diode in the Fuzz box is on the rare side, depending on where you are, so I suggest using 1n34a & 1n270 Germanium diodes, as they are more common & easier to find

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Permalink Reply by BrianQ. on March 9, 2024 at 2:35pm

Treble Boost for your Guitar Info:

Original Motorola HEP55/S0015 transistor specs:

  Recently I built this on my Breadboard with the Motorola transistor & Resistor values from the original article, but the transistor was mis-biased & sounded pretty crappy! I recommend changing R1 to 560K ohms & R3 to 10K ohms to get the bias into focus? These two Resistors are the ones that make this tick, so if yours doesn’t quite sound right, these are the ones to fool with? I also recommend using a Low noise NPN Bipolar Transistor like BC108b or BC547b instead, it will not have the noise & hiss of the original transistor? Another recommended substitute is to use an ordinary 5K ohms Linear pot instead of the switched pot, as they are not as common as they were at the time the article was written. And forget the dotted line in the schematic that connects to the power, this is for the switched pot? Pro Tip: if you have a Breadboard, then that’s the best way to sort out the details of what Resistor value works best? 

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