dpFX Pedals - Thryallis Germanium Overdrive/Boost (limited series)

"dpFX Pedals" crafts handmade and custom effects (dpeffects.com). All products are serial numbered.

This is the Thryallis Germanium Overdrive.

- Improves the sound of the overdrives & distortions that come after it.
- Wonderfully pushes an amp that is set on the edge of breakup.
- It can work as a tuneable treble booster that can be stacked nicely with other overdrives.
- It can be subtle but it can also show a more aggressive character.
- Offers a vintage attitude.

This pedal is actually a booster with dual gain controls which give you a wide overdrive range, starting from a slight grit when both gain-knobs are at minimum up to fuzzy sounds when the gains are at max.

The addition of a controllable bass filter right in front of the circuit offers you the ability to adjust the tone of the effect and the ‘color’ of the drive. When the bass knob is at maximum you get a full range drive and as you turn it counter-clockwise (reducing the bass) you will start to approach the sound of a treble booster.

The circuit has two discrete stages each one built around germanium transistors, each with a separate gain control.
Each stage produces distortion by overdriving its transistor, also when you increase the gain of the first stage it will lead to a more intense overdriving of the second stage.

Due to the topology that was selected for the circuit the pedal has an input impedance similar to the classic, wide known treble boosters.

The toggle switch offers you 3 different sound possibilities:
-- N: Middle position: Normal state. Transistor only.
-- d: Bottom position: Adds a diode-clipping stage.
-- L: Top position: Adds a high-cut filter.

▹ Voltage Required: DC 9 Volt
▹ Polarity: Negative tip
▹ Max Current draw: 2mA

NOTE:
The only reason Thryallis is marked as a "limited series" pedal is due to the limited number of germanium transistors that I currently possess and it's not just to create a hype. I honestly hate the whole hype around germanium transistors and the ridiculously overpriced pedals that appear in the market from time to time just because they are using some 'exotic', special, NOS (nos my a$$) transistors. Since a lot of people asked me to build a germanium overdrive I created Thryallis using some transistors I currently possess (half of them are crap) but my stock is of course limited and I'm not currently intended to search and buy new stock of such transistors.;-)

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