CLASS A

Germanium amplifier V2

Voicing switch:

• Mid: Effective at boosting for more drive, without the bottom end getting too flabby.
• Bright: Slightly fuller than a classic treble booster.
• Full Cream: Extra body, and fat tone.

GE / SI
Silicon mode can be used as a backup in extreme temperatures, or for some harder clipping texture. This switch mechanically 'hot swaps' the transistor. Expect a small pop noise.

N.B. for purity of design, this pedal uses a positively grounded case. As such, it needs to be run from an isolated power supply, or battery. IE this pedal may not be suitable for a daisy-chain power supply. Battery use is not necessarily preferred.

AUD$229 delivered within Australia only. See returns policy.

or

USD$165 delivered world-wide. Sent by EMS express courier where possible. See returns policy.

My tremolos are easily my favourite circuits, and have occupied more of my design time than anything else. This was my first effect design from scratch, which I started in high school. Development took over a decade before I was happy with it.

By shining a fading light against a photo-sensitive field, this tremolo uses all-analog photo-coupling to restrict and fluctuate the output volume. Careful waveform construction, with non-linear photocell coupling, creates an organic and lively volume fluctuation, far divorced from sounding like a basic electronic waveform function. The square wave is similarly processed, so as not to sound like a computer.

Symmetry switch: This toggles between two modes which are subtly different. The asymmetric mode (up) has a slightly uneven rhythmic pattern. I feel this mode is sweeter, as it has a less obvious tempo. The modulation ascent and decent waveforms have slightly different shapes, which change and adapt for volume with different speeds and depths. This can be heard with emphasis in the original liquid spinning can tremolos.

I prefer to use the asymmetrical mode for the square wave, as the signal stays 'on' longer, with less gap time.

The symmetrical mode (down) has an even 360 degree spin, with a very slightly deeper scoop. It has a classically pronounced tremolo shape.

This circuit operates with in a split rail power supply for increased headroom, and has a very low noise level.

As with all of my tremolo models, you should expected perceived unity volume with all depth and rate settings, without having to make any manual volume adjustments. The wet level can be adjusted internally by a trimpot.

AUD$229 delivered within Australia only. See returns policy.

or

USD$165 delivered world-wide. Sent by EMS express courier where possible. See returns policy.

BLACK RUSSIAN XXL

Version 7C "Bubble Font" Green Russian / Black Russian build. This is a very similar circuit to the ТРАНЗИСТОР "Tall Font" circuit.

Featuring:

• Point-to-point soldering and construction
• Nichicon Japanese audio capacitors
• Xicon polystyrene smoothing capacitors
• Soviet black glass clipping diodes
• GØRVA footswitch

This pedal is being offered at a special direct-to-customer wholesale price, without any store margins applied. Built to-order. Please allow up to approximately one week construction time before posting.

AUD$420 delivered within Australia only. See returns policy.

or

USD$289 delivered world-wide. Sent by EMS express courier where possible. See returns policy.

Biiig Fuzz

A point-to-point version of my compact Big Fuzz pedal.

This pedal was intentionally designed to look as homemade as possible, while still being built like a tank.

The point-to-point application comes from my youth, when I worked in a valve amplifier factory exclusively with tag strip.

There's no user manual. I assume that this won't be your first muff. The only thing to know is that the 73 switch toggles between standard muff setup (LED red) to a '73 Supa setup (LED green). The 73 mode has less diode compression on the low-end, widening the dynamic range in the bass, and allowing the natural transistor fuzz character to be better heard.

There is no internal battery space. A battery may be used by means of an external adapter (not supplied).

This pedal is expensive, as it takes me days to build. Built to-order. Please allow up to approximately one week construction time before posting.

Components used may vary to those shown in the photo. Photos are shown as a general guide for construction and components quality.

"It sounds like... God. If God was a Big Muff pedal. If God was a fuzz pedal, I reckon, you know, it might sound like this" - Brett Kingman.

AUD$720 Delivered within Australia only. See returns policy.

or

USD$469 Delivered world-wide. Sent by EMS express courier where possible. See returns policy.

ULTRA RAD DISTORTION

A larger, point-to-point version of the compact Rad Distortion.

This pedal can be used either as a classic ratty fuzz/distortion, or as a raunchy germanium overdrive. This is a sound of the '80s and '90s, with some Dazatronyx tweaks.

The 'stock' silicon mode is the classic ratty sounding fuzz-distortion. This is achieved by a two-stage distortion of first overdriving the metal can 308 amplifier into fuzz, and then recovering some shape by further compressing the signal using hard-clipping silicon diodes.

In the germanium mode, the silicon chip fuzz character gets removed. Germanium transistors and germanium diodes are used to achieve a rounded and organic overdrive-distortion.

The HAIR control dials the mid/high drive saturation. Turning this completely to the right achieves the classic metally ratty distortion. Turning this left achieves a full, flattened response. This is a variable version of the reutz mod.

There is no internal battery space. A battery may be used by means of an external adapter.

This pedal is expensive, as it takes me days to build. Built to-order. Please allow up to approximately one week construction time before posting.

AUD$720 Delivered within Australia only. See returns policy.

or

USD$469 Delivered world-wide. Sent by EMS express courier where possible. See returns policy.

ТРАНЗИСТОР

The ТРАНЗИСТОР (transistor) is a faithful recreation of the famous and most sought-after Tall Font Russian Muff. I've kept the design true to the original, but have also added the mids control, as this has been too helpful to neglect. This creates exactly the original tone when rotated fully left. This model provides a more musical clarity and bloom in the lower frequencies.

Notes on the construction? It is all designed, powder coated, drilled, printed, soldered, and assembled at home. The powder coat is by Dulux Australia (super tough), and won't flake like the originals. Carbon film resistors are used, keeping to the classic builds. Polystyrene capacitors are used for the smoothing caps; two 1000pF in series at each stage like the originals. Soviet black glass diodes are used for clipping.

Model

Built by Darron $299.00 AUD Complete DIY kit $139.00 AUD PCB only $15.00 AUD

Delivered within Australia only. See returns policy.

or

Model

Built by Darron $219.00 USD Complete DIY kit $99.00 USD PCB only $12.00 USD

Delivered world-wide. Sent by EMS express courier where possible. PCBs are sent by international letter post. See returns policy.

This project is also available as a complete DIY kit, or just the PCB (not including components). The kit version does not include the metal foot switch dress nut shown in the photo. The enclosure supplied in the kit comes pre-drilled and printed with a smilar "DIY version" artwork.

If you'd like to build this pedal even cheaper, consider buying the hardware and components delivered directly from Tayda Electronics, as they have fast and economical delivery of cheap parts.

DIY build documents:

• Bill of materials
• Parts layout
• Schematic
• Tayda drill layout (order any colour you want)

This is an old-recipe, classic germanium fuzz, built to end your Fuzz Face search. New-old-stock European AC128 transistors are used, housed on a turret circuit board.

The Roger Mayer Hendrix mods have been implemented, which make better use of AC128 transistors. These mods notably output higher gain than the standard fuzz face, and cleans up neater with the volume knob rolled back. The FUZZ knob has an extended range, and improved sweep.

There is no internal battery space. A battery may be used by means of an external adapter.

This pedal should be placed first in the signal chain to voice correctly, connected directly to the instrument, and before any buffered pedals.

The aluminium can capacitors are ridiculously oversized for their rated voltages. They are audio rated for very low ESR.

This circuit uses PNP type transistors. The power supply input is the industry standard 9V type with negative centre. However, for purity of sound; the case is positively-grounded, and as such cannot share a power supply with other pedals unless the supply has isolated outputs.

The transistors used are cherry-picked for suitability from my collection which I have saved for many years, and as such are limited in availability. First in, best dressed. Germanium transistors are temperature sensitive, and will perform differently according to the ambient temperature.

A Carling DPDT footswitch is used for the familiar under-foot haptic clunk. Components used may vary to those shown in the photo. Photos are shown as a general guide for construction and components quality.

There is also a listing option for ' A-stock' hydro swirl paint finish. Each is unique, and some more interesting than others. Website purchases will be for my favourite available dip enclosure, or otherwise contact me to discuss options made to-order. Examples can be found in past social media posts. Lower-price versions are available in a plain silver hammertone powder coat by Dulux Australia.

Enclosure finish

Hydro swirl dip paint $420.00 AUD Silver hammer powder coat $329.00 AUD

From $329 delivered within Australia only. See returns policy.

or

Enclosure finish

Hydro swirl dip paint $289.00 USD Silver hammer powder coat $229.00 USD

From USD$229 delivered world-wide. Sent by EMS express courier where possible. See returns policy.

The THD is an '80s metal fuzz distortion, a rework of the original Japanese HM-2. This was my first guitar pedal, which later formed its own cult following.

By using a dual-gang potentiometer, the DISTORTION knob has been redefined from the sloppy classic one. This is actually a dual-function control for two cascading gain stages: The first half of the range of the DISTORTION knob controls a full-bodied fuzz. The second half adds a further layer of compression and sustain.

The signal is processed through germanium diodes in the final compression stage. This is a crucial part of the tone, which would be omitted from commercial reissues due to RoHS.

The LO+ and HI+ are frequency boost controls. For a flat EQ response, try starting with these set to zero, rather than high noon. If you want to 'max out' all of the controls for the Swedish chainsaw tone, then you will need to reduce the VOL control to-taste, as it has an increased output level from the classic.

Japanese polyester audio capacitors are used, as well as low noise resistors (higher quality than the through-hole counter-parts), and low ESR ceramic power filter capacitors for the SMD version. These do not suffer the limited shelf life of electrolytic capacitors, and are distributed throughout the board in key locations, rather than one large electro filter cap serving the whole circuit. Low noise audio amplifier chips have been used.

Please note that the two toggle 'mod' toggle switches shown in some videos are from the first version, are not included as standard.

Model

4 knobs only. Hybrid machine-soldered $239.00 AUD +2 mod switches. All hand soldered $289.00 AUD Complete DIY kit $119.00 AUD Partially populated PCB $32.00 AUD

Delivered within Australia only. See returns policy.

or

Model

4 knobs only. Hybrid machine-soldered $169.00 USD +2 mod switches. All hand soldered $199.00 USD Complete DIY kit $99.00 USD Partially populated PCB $23.00 USD

Delivered world-wide. Sent by EMS express courier where possible. PCBs are sent by international letter post. See returns policy.

This project is also available as a complete DIY kit, or just the PCB (not including through-hole components). The circuit board comes pre-loaded with ICs, SMD resistors, power filter capacitors (no need for any elecrolytics), and silicon diodes. The through-hole audio capacitors and germanium diodes must be soldered by the builder. The kit version does not include the metal foot switch dress nut shown in the photo.

Don't feel intimidated by the surface mount components. Having this work pre-done drastically decreases the chances of human error, and makes this otherwise complex circuit have a very high chance of build success, particularly for beginners.

The kit version does not include the metal foot switch dress nut shown in the photo. The enclosure supplied in the kit comes pre-drilled and printed with a smilar "DIY version" artwork. The print can be sanded off if you want to do your own painting or artwork.

If you'd like to build this pedal even cheaper, consider buying the hardware and components delivered directly from Tayda Electronics, as they have fast and economical delivery of cheap parts.

Build documents:

• Build video guide
• Bill of materials and build notes
• 1590BS parts layout and drilling cut-out
• 1590N1 / 125B (larger size) drill layout cut-out

Previous build documents:

• Bill of materials and build notes
• PCB component placement
• 1590BS Drill layout cut-out
• 1590N1 / 125B (larger size) Drill layout cut-out

BIG FUZZ

The Big Fuzz began as a muff circuit, which has been critically re-tuned to improve the tone, playability, and versatility of the pedal.

The MIDS control knob sweeps from the classic scoop, through to a more focused modern tone, with everything nice in the middle. (Classic muff scooped mids will be found around the 9 o'clock position).

The BMP/STB switch toggles between a modified muff setup, to a 1973 Colorsound Supa Tonebender mode (with the variable mid knob, of course). The STB mode has less diode compression on the low-end, widening the dynamic range in the bass, and allowing the natural transistor fuzz character to be better heard.

This fuzz uses gain-selected transistors, and black glass silicon diodes.

AUD$249 delivered within Australia only. See returns policy.

or

USD$179 delivered world-wide. Sent by EMS express courier where possible. See returns policy.

BLACK RUSSIAN

Version 7C Green Russian / Black Russian build, in a compact 1590B footprint enclosure. This is a very similar circuit to the ТРАНЗИСТОР "Tall Font" circuit.

Featuring:

• Nichicon Japanese audio capacitors
• Xicon polystyrene smoothing capacitors
• Soviet black glass clipping diodes
• GØRVA footswitch

AUD$229 delivered within Australia only. See returns policy.

or

USD$165 delivered world-wide. Sent by EMS express courier where possible. See returns policy.

RAD DISTORTION

This pedal is the classic ratty fuzz/distortion. This is a sound of the '80s and '90s, with some Dazatronyx tweaks. This is achieved by a two-stage distortion of first overdriving the metal can 308 amplifier into fuzz, and then recovering some shape by further compressing the signal using hard-clipping silicon diodes.

The HAIR control dials the mid/high drive saturation. Turning this completely to the right achieves the classic metallic ratty distortion. Turning this left achieves a full, flattened response. This is a variable version of the reutz mod.

In the (optional) germanium mode, the silicon chip fuzz character gets removed. Germanium transistors and germanium diodes are used to achieve a rounded and organic overdrive-distortion.

Model

SM wood print case + germanium OD mod switch $249.00 AUD SM flametop case - 4 knobs only $249.00 AUD SM flametop case + germanium OD mod switch $279.00 AUD XL wood print case + germanium OD mod switch $269.00 AUD XL flametop case + germanium OD mod switch $299.00 AUD XL complete DIY kit including germanium OD switch $139.00 AUD

Delivered within Australia only. See returns policy.

or

Model

SM wood print case + germanium OD mod switch $169.00 USD SM flametop case - 4 knobs only $169.00 USD SM flametop case + germanium OD mod switch $189.00 USD XL wood print case + germanium OD mod switch $183.00 USD XL flametop case + germanium OD mod switch $189.00 USD XL complete DIY kit including germanium OD switch $99.00 USD

Delivered world-wide. Sent by EMS express courier where possible. See returns policy.

Build documents:

• XL Bill of materials

A recreation of the EJ silicon Fuzz Face.

Model

Built by Darron $199.00 AUD Complete DIY kit $99.00 AUD PCB only $9.00 AUD

Delivered within Australia only. See returns policy.

or

Model

Built by Darron $159.00 USD Complete DIY kit $89.00 USD PCB only $9.00 USD

Delivered world-wide. Sent by EMS express courier where possible. PCBs are sent by international letter post. See returns policy.

This project is also available as a complete DIY kit, or just the PCB.

If you'd like to build this pedal even cheaper, consider buying the hardware and components delivered directly from Tayda Electronics, as they have fast and economical delivery of cheap parts.

Build documents:

• Bill of materials and build notes
• 1590BS parts layout and drilling cut-out
• 1590N1 / 125B (larger size) drill layout cut-out
• Schematic (offboard wiring not shown)
• Tayda drill layout. Order any colour you want. (UNVERIFIED)

TSX OVERDRIVE

The TS10 circuit had some minor variations to the TS9 and TS808 circuits, and is now highly sort after for its secret-sauce flavour.

The classic TS10 stock tone is achievable in STD mode, as well as two other variation modes:

• STD - Classic TS symmetrical clipping, with a focus on mids.
• ASYM - Asymmetrical clipping shape begins to ‘look’ more like valve amplifier clipping. This can better suit input signals which already have a full bottom-end, such as a neck pickup, and allows chord detail to better shine through.
• FAT - Asymmetrical clipping, with a fuller bottom-end.

The gain control has twice the amount of gain range as a classic TS. The extended range begins at the 2 o'clock position onwards.

The chip has been upgraded to a higher performance audio amplifier by JRC (Japanese Radio Company). The 'soft clipping' is achieved using three black glass silicon diodes.

AUD$239 delivered within Australia only. See returns policy.

or

USD$169 delivered world-wide. Sent by EMS express courier where possible. See returns policy.

PROFESSIONAL DRIVE XL

This is the result of my work redeveloping the classic TS overdrive circuit over many years, and critically evaluating every tone-shaping aspect of the signal path.

This XL sized version is 808-based, and using over-spec'd parts.

The three-way switch which toggles between three modes, which is helpful to suit a broader range of pickups and play styles.

• STD - Classic TS symmetrical clipping, with a focus on mids.
• ASYM - Asymmetrical clipping shape begins to ‘look’ more like valve amplifier clipping. This can better suit input signals which already have a full bottom-end, such as a neck pickup, and allows chord detail to better shine through.
• FAT - Asymmetrical clipping, with a fuller bottom-end.

The gain control has twice the amount of gain range as a classic TS. The extended range begins at the 2 o'clock position onwards.

AUD$269 delivered within Australia only. See returns policy.

or

USD$189 delivered world-wide. Sent by EMS express courier where possible. See returns policy.

Please note: The second toggle switch option seen in some old demo videos below is no longer included in the current production model for sale here. I found that the tone knob can make a setting which sounds the same as the "2 knob" mode, so it was removed. Components used may vary to those shown in the photo. Photos are shown as a general guide for construction and components quality. Many of the carbon comp resistors shown are now replaced for 1W carbon film, and 3W metal film in noise-critical locations.

TWIN FET BOOSTER

This is the continuation of a design which I have been building over the years under the names Fetish Booster and Little Fetish. This discrete circuit is an adaption of a valve topology used to squeeze extra gain from vacuum tubes. 5457 Field effect transistors are used, being the closest sold-state counterparts.

The body control shapes the output tone. Turn it all the way up for a full bodied, flat frequency response.

The Twin FET Booster runs on a split-rail power supply (-9, 0, +9) for increased headroom. Noise levels are very low. There is an internal gain adjustment trimpot which can be dialed for clinical sterility, through to crunchy FET breakup.

This circuit is also available as a DIY build as the Discrete Boost.

AUD$169 delivered within Australia only. See returns policy.

or

USD$125 delivered world-wide. Sent by EMS express courier where possible. See returns policy.

STEREO PANNING

 OPTICAL TREMOLO

After a decade of development, I've created this completely unique circuit as my ideal tremolo. This is easily my favourite effect circuit.

By shining a fading light against a photo-sensitive device, this tremolo uses all analog photo-coupling to restrict and fluctuate the output volume. There is automatic perceived volume compensation for the full sweep of the controls.

This is a stereo variation of my smaller Optical Tremolo. It can take a stereo input, or split a mono guitar input between stereo channels. The PAN switch changes the oscillator of each channel to be out of sync - so one comes up in volume while the other drops. This creates a strange swirling effect. All original analog circuitry and true bypass mechanical switching.

As with all of my tremolo models, you should expected perceived unity volume with all depth and rate settings, without having to make any manual volume adjustments. The wet level is adjustable internally by a trimpot.

The new boards are using surface-mount assembled parts. This has allowed me to upgrade many aspects, including using Burr Brown audiophile amplifier chips.

The signal is now processed with a true split rail power supply (not a voltage doubler), thus eliminating the need for audio coupling capacitors, and has the highest headroom, and lowest noise levels of any model so far.

SMD multi layer ceramic capacitor arrays are used for power filtering instead of electrolytic capacitors, offering much lower ESR. This also extends the service life of the pedal, as there are no shelf life concerns as with ceramic capacitors which common electrolytic capacitors have. Nor are ceramic capacitors prone to leakage or value drift issue. SMD capacitors are not used in the audio path. Only low noise thin film resistors are used for the audio path. This has allowed me to keep the price down after materials cost inflation, while moving to much more complicated circuits where human assembly error is a significant concern.

Currently out of stock (here). Find more in store stock at:

• Deluxe Guitars
• Swop Shop

BROWN SOUND

The BSIAB2 circuit (Brown Sound in a Box 2) was my favourite distortion during school. The cool thing was; if you wanted one, you just had to build one. Or know somebody who would. The circuit was designed by Ed Guidry, similar to works by Jack Oran and Aron Nelson.

Back in the day, it was one of the highest-recommended builds on the forums. Forums were a thing. Many would suggest that this design was the original precursor to many of the "high gain amp" pedals that came out in the 2000s.

It has a tonne of gain, and can dial in a fat bottom end to fake a big amp sound. Some pedals claim to "stack well" together, but the Brown Sound can also be a "stack" all by itself. This circuit also responds excellently to rolling back the instrument volume knob. It stacks best with other drive pedals running into the input.

Distortion is achieved by overdriving NOS Fairchild 5457 field effect transistors (FETs), being the closest solid-state relative to vacuum tubes. There are three stacked gain stages. No diodes are involved for distortion

This build uses a hybrid mix of both surface mount and through-hole assembled components (SMD).

A dual TSX combo model is also available.

Model

Built by Darron $199.00 AUD Complete DIY kit $99.00 AUD Partially populated PCB $25.00 AUD

Delivered within Australia only. See returns policy.

or

Model

Built by Darron $159.00 USD Complete DIY kit $89.00 USD Partially populated PCB $17.00 USD

Delivered world-wide. Sent by EMS express courier where possible. PCBs are sent by international letter post. See returns policy.

This project is also available as a complete DIY kit, or just the PCB (not including through-hole components). The circuit board comes pre-loaded with SMD resistors, power filter capacitors (no need for any elecrolytics), and protection diode. The through-hole audio capacitors and 5 surface mount transistors must be soldered by the builder. If you are not confident in soldering the SMD transistors, then please let me know and I can do that part. If this is your first experiene with SMD but you are otherwise experienced with soldering, then I say: "give it a go".

The kit version does not include the metal foot switch dress nut shown in the photo. The enclosure supplied in the kit comes pre-drilled and printed with a smilar "DIY version" artwork. The print can be sanded off if you want to do your own painting or artwork.

If you'd like to build this pedal even cheaper, consider buying the hardware and components delivered directly from Tayda Electronics, as they have fast and economical delivery of cheap parts.

Build documents:

• Bill of materials and build notes
• 1590BS parts layout and drilling cut-out
• 1590N1/125B parts layout and drilling cut-out
• Schematic (offboard wiring not shown)
• High-res gut shot.
• Video of similar style 1590BS build/assembly process

BROWN SOUND X TSX

A dual build of the Brown Sound and TSX pedals.

Please note that the new builds have raw metal sides, not gold powder coat.

AUD$279 Delivered within Australia only. See returns policy.

or

USD$199 Delivered world-wide. Sent by EMS express courier where possible. See returns policy

Tweedsville

The three-position switch toggles between amp models of varying gain and bottom-end saturation. This is achieved by a bipolar silicon transistor preamp, with secondary distortion created by J201 field effect transistors.

This circuit is where I have landed from requests to build a pedals similar to the Lovepedal Les Lius, which is fundamentally a '70s Electra Distortion circuit.

AUD$185. Free delivery worldwide. See returns policy.

Components used may vary to those shown in the photo. Photos are shown as a general guide for construction and components quality. Some carbon comp resistors have changed to carbon film type.

harmonic

OPTICAL TREMOLO MK1

This build is not a black face style tremolo. This particular circuit works in a unique way, as two varying high-pass and low-pass filters. Instead of modulating the volume of two registers, it actually modulates the frequency cut of each register. This is done using two very particular photocell sensors, paired against lights which fade in and out. Think of turning two low-pass and high-pass frequency knobs at the same time.

This model uses relay switching to include the basic tremolo function from my classic Optical Tremolo design, as well as the asymmetrical square wave.

As with all of my tremolo models, you should expect perceived unity volume in all modes with all depth and rate settings, without having to make any manual volume adjustments. The wet levels can be adjusted internally by a trimpot. There is an internal voltage boost for increased headroom, while keeping low noise levels.

This version uses surface-mount components to compact it down to a small 1590B footprint enclosure. 100% Analog circuity. True bypass. There is no internal battery space.

SOLD OUT

TSUCHI FUZZ v2

The Tsuchi Fuzz V2 takes a new look at the classic two-transistor fuzz circuit. The circuit's tone has been carefully evaluated at every shaping point, to produce either classic or modern fuzz tones.

For a classic germanium fuzz, dial the GAIN back, and turn the CUT right up. Leave the BASS EXPANDER off.

For some reshaped flavour: turn the GAIN up higher. This is more gain than you should rightfully squeeze out of a two-transistor fuzz, but dialing the CUT knob back a little can tighten the bottom-end flabbiness and make some refined fuzz-drive. The BASS EXPANDER can optionally be used to-taste to replace the low end reduced by the CUT control.

N.B. for purity of design, this pedal uses a positively grounded case. As such, it needs to be run from an isolated power supply, or battery. IE this pedal may not be suitable for a daisy-chain power supply. Battery use is not necessarily preferred.

Not in production

DISCRETE BOOST

This is an easy beginner project; a discrete boost using two JFETs. There are options for either through-hole transistors, or SMD pads. The IC chip is used to create a split rail power supply (+9V, 0V, -9V) for doubled headroom.

The controls are MASTER (volume) and BODY. With the BODY knob turned fully up, you get a flat and even boost across all frequencies. GAIN can be set by an internal trimpot, or a fixed value resistor.

To make things simple, there are some pre-installed surface-mount parts included (shown). These mostly help to build the power sections. This leaves only a small handful of audio parts left to solder, saving you on part costs, and build complexity errors.

The surface-mount multilayer ceramic capacitors offer superior ESR properties, and don't have the short-lived shelf life as compared with the electrolytic capacitors. Included SMD parts are: schottky polarity protection diode, self-resetting overcurrent fuse, 33K LED limiter (with through-hole option for value reduction), 3M3 input pull-down resistor, and 12x 22μF capacitors for power switching and filtering. No other parts are included.

I have previously built this circuit under the names "Fetish Booster" and "Little Fetish".

Circuit boards are posted as letter post.

Build Documents:

• Bill of materials and build notes
• Schematic
• 1590BS Drill layout cut-out
• 1590N1 / 125B (larger size) Drill layout cut-out

or