Akashic Guitar effects circuit lookup
EXPANDERBALANCE

1590BB · 2 knobs

Tagboard Effects

Univox Super FuzzVerified

Based on the Univox Super-Fuzz· 37 other boards clone it

Category
Fuzz
Controls
Expander · Balance
Build
Vero· 32×12
Layout
Verified · Tagboard Effects marks it as built and working
Tags
Fuzz, Univox
Open the layout at Tagboard Effects

From the post

Note the pin layout required for the transistors. This will accommodate many modern NPN silicon transistors, but you will need to either alter the layout or twist over pins if using transistors with a different pin layout like the 2SC828s used in the original. One for a 1590BB, but I'll do a 1590B friendly version at some point.

Schematic

This is a board layout, a drawing of where each part goes, and the post may link the schematic it was drawn from. Open the layout at Tagboard Effects. No KiCad fragment has been drawn for this circuit yet.

Parts list 21 rows

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Check before you build · 2 values the reader of this layout was not sure of
  • 22K right of centre (about column 20): partly hidden under a semi-transparent 10u can, read as 22K
  • Off-board blue three-lug toggle is not named or typed in the drawing: entered as SPDT (the Super-Fuzz tone switch)
RefValueNormalizedTypeNotes
Resistors 11
×710K10kread from the layout by eye
×6100K100kread from the layout by eye
×422K22kread from the layout by eye
×347K47kread from the layout by eye
×21K81.8kread from the layout by eye
×2470R470read from the layout by eye
×1220K220kread from the layout by eye
×1470K470kread from the layout by eye
×1150K150kread from the layout by eye
×115K15kread from the layout by eye
×11K1kread from the layout by eye
Capacitors 4
×1110u10uelectrolytic; read from the layout by eye
×147u47uelectrolytic, axial; read from the layout by eye
×21n1nread from the layout by eye
×2100n100nread from the layout by eye
Diodes 2
D1OA90OA90read from the layout by eye
D2OA90OA90read from the layout by eye
Transistors 1
×6BC550CBC550CQ1-Q6; legend: originals were 2SC828, layout based on CBE pinout transistors such as the BC550C; read from the layout by eye
Potentiometers 2
ExpanderB50KB50kPotentiometerread from the layout by eye
BalanceB50KB50kPotentiometerread from the layout by eye
Switches 1
×1SPDTSPDTtoggle, unlabelled; read from the layout by eye

Other boards based on the Univox Super-Fuzz