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    Common Source N-Channel JFET 'Fat' Control

    Is there a way to variably alter the frequency response of an N-Channel JFET amplification stage with a pot instead of a toggle for the source capacitor? I'd like to keep the gain static and not disrupt the Vgs bias voltage in the process.
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    Lectric-FX Flintlock Flanger (A/DA Flanger)

    This thing is incredible. It's an extremely versatile modulation circuit capable of delivering hollow pipe and jet engine flanger sounds as well as subtler flanger movement. Beyond flanger, lush chorus, vibrato, percussive tremolo, and a pseudo-phaser can be dialed in. Removing the LFO allows...
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    Beatles Bass Tone

    A friend is looking to hit McCartney bass tone (specifically abbey road). I’m thinking compressor (fast attack/slow release) and some dirt. There’s of course no shortage of Beatles in a box guitar pedals, but I’m interested to hear some bass ideas.
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    Boneyard FireDrake

    Another one for / from the boneyard. Details here.
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    VFE Dragon Hound SPS – "Faust"

    This is the second of two builds of which @jjjimi84 was kind enough to lend his artistry. The inspiration for these were my and my partner's dogs. My dog Faust is pictured here. (Part 1 here) The Dragon Hound is a parallel overdrive (modified Pale Horse TS-inspired) / distortion (modified Alpha...
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    VFE Dragon SPS – "Olive"

    This is the first of two builds of which @jjjimi84 was kind enough to lend his artistry. The inspiration for these were my and my partner's dogs. Her dog Olive is pictured here. (Part 2 here) His build report thoroughly covers the capabilities of this build. It's a truly fantastic overdrive. As...
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    Servo-Based Ge Fuzz Face [Boneyard]

    Project development detailed in this thread. Edit: PNP and NPN versions!
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    VU Meter with Peak Detection

    I really enjoy building utility circuits: signal routers, mixers, patch boxes, etc.—anything that can open up different options without changing fundamental elements or introducing anything new. Even though their real utility is debatable and there are many other (better) line monitors...
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    Simple Level Meter

    First project is up on Protoboard Micro. I took inspiration from @fig and attached the board via velcro to swap out projects without tearing down. Here, I'm working on a simple level meter based on a project offered by MAS Effects. The first stage is a buffer that allows for a bit of level...
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    Editing interface on mobile

    The editing interface (i.e., bold, italics, links, @ tags, etc.) is greyed out for me on mobile (iPhone, safari). Is that just on my end?
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    Pot taper modification check

    I need a dual C1K pot and can't find one. I can swap out wafers, but since it's being used as two variable resistors in the circuit, it may be easier to just tack on parallel resistors. I'm thinking that if I have a dual B5K pot and I solder a 1.2k resistor between lugs 2 and 3, I'll get a 1K...
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    Raising the Vf with Ge clipping diodes

    I've always been curious about a ge and si diodes in series. It'd be great to be able to raise the Vf threshold and retain the characteristics of germanium clipping without requiring two or three in series in order to do so. What behavior can be expected here? Does it work differently for soft...
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    Aion Quadratron (Lovetone Doppelganger) LFO Issue

    My quadratron build has a slight issue with the LFOs when dual mode is activated. In single LFO mode, the entire range of knob is useful. In dual LFO mode, the upper third or so locks up the LED at full brightness with no oscillation. Note that at least one other builder has had this issue. The...
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    Transparent Crystal Lettuce Overdrive

    Still waiting for this one.
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    High leakage Ge (>500μA) uses

    Any advice for high(er) leakage Ge transistors? I’d prefer to not use them as diodes if I can avoid it.
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    Build Document Revision History

    A short section at the end of the build documents detailing when/what changes were made.
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    Filtered power and ground pads

    Filtered power / ground pads would be very helpful for daughterboards (e.g., relay switching, buffers, etc.).
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    Gain Stage Range Shift Toggle

    I'm working on an op amp gain stage and wanted to have a toggle switch to shift the range of GAIN knob. I'd like to keep the dBV range constant while shifting the gain window. For example, a gain stage with a delta of 18dB has a 'Low' range of -6dB to +12dB and a 'High' range of +8dB to +26dB...
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    Tayda Shipping

    Is DHL still a shipping option for CONUS?
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    Charge Pump Block Question (TC1044SCPA)

    For projects with a charge pump (e.g., TC1044SCPA) for (positive) voltage doubling, why is there a capacitor between pin 4 (CAP-) and pin 2 (CAP+) before connecting to another cap positioned on the cathode of the Schottky diode after pin 8 (V+). Unless there's a negative voltage conversion, is...
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