Akashic Guitar effects circuit lookup
PRESENCETREBLEMASTERMIDDLEGAINDEEPBASS

Enclosure not stated · 7 knobs

Tagboard Effects

Diezel VH4Verified

Based on the Diezel VH4· 6 other boards clone it

Category
Distortion
Controls
Presence · Treble · Master · Middle · Gain · Deep · Bass
Difficulty
Difficult
Build
Vero· 28×23· 52 cuts, 23 links
Layout
Verified · Tagboard Effects marks it as built and working
Tags
Diezel, Distortion, Pre-amp, VH4

From the post

"Unlike traditional overdrive stomp boxes, the VH4 Pedal is a true preamp which delivers an authentic representation of its namesake – real Diezel tone – not emulated, not modeled, but sincerely reproduced. The entire signal architecture is faithful to the original: Bass, Mid, Treble and variable Deep and Presence controls allow you to tailor the uniquely Diezel Overdrive character. The command found in the Gain control gives a player everything they will ever need with lower gain settings producing the classic Diezel sparkle and chime to saturated mid-gain sounds, to scorching Diezel leads by cranking it all the way up.

As close to the original VH4 preamp, the VH4 pedal can be used as either an overdrive or as a standalone preamp to feed into your amps power section. What players take away by going direct into the power amp is all the dynamic, unfiltered Diezel tone by simply plugging into your amplifiers clean channel. Two outputs are provided with the first intended to connect to the front of a guitar amplifier and the second allows for a connection to a line-level power amp or power section of your amp via the Effects Return."

Original FSB thread and schematic available here.

This is a buffered effect.

Follow the layout's footswitch wiring.

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 41 rows

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Check before you build · 1 value the reader of this layout was not sure of
  • 2134: printed without prefix, entered as OPA2134
RefValueNormalizedTypeNotes
Resistors 16
×5100K100kread from the layout by eye
×5220K220kread from the layout by eye
×410K10kread from the layout by eye
×31M1Mread from the layout by eye
×2470K470kread from the layout by eye
×21K1kread from the layout by eye
×210R10read from the layout by eye
×1680K680kread from the layout by eye
×1150K150kread from the layout by eye
×156K56kread from the layout by eye
×139K39kread from the layout by eye
×14K74.7kread from the layout by eye
×11M51.5Mread from the layout by eye
×1100R100read from the layout by eye
×147R47read from the layout by eye
×1??LED resistor, value not given; read from the layout by eye
Capacitors 12
×147p47pread from the layout by eye
×3100p100pread from the layout by eye
×1560p560pread from the layout by eye
×11n1nread from the layout by eye
×22n22.2nread from the layout by eye
×14n74.7nread from the layout by eye
×422n22nread from the layout by eye
×1330n330nread from the layout by eye
×41u1uelectrolytic; read from the layout by eye
×32u22.2uelectrolytic; read from the layout by eye
×210u10uelectrolytic; read from the layout by eye
×547u47uelectrolytic; read from the layout by eye
Diodes 2
×25V6 Zener5V6D1, D2; read from the layout by eye
×41N41481N4148D3-D6; read from the layout by eye
ICs 4
×1OPA2134OPA2134printed 2134; read from the layout by eye
×1TL074TL074read from the layout by eye
×17660S7660Scharge pump; read from the layout by eye
Q1LM2940CT-12LM2940CT-1212V regulator; read from the layout by eye
Potentiometers 7
PresenceC25KC25kPotentiometerread from the layout by eye
TrebleB250KB250kPotentiometerread from the layout by eye
MasterA10KA10kPotentiometerread from the layout by eye
MiddleB25KB25kPotentiometerread from the layout by eye
GainA250KA250kPotentiometerread from the layout by eye
DeepC25KC25kPotentiometerread from the layout by eye
BassA1MA1MPotentiometerread from the layout by eye

Other boards based on the Diezel VH4