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Forum Home > Layout Gallery - GuitarPCB Build Documents, Mods and Tips > Black Dog

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The Black Dog is a pure amp over-drive that offers some really authentic tones guaranteed to satisfy your desires. Not only will it provide the right amount of gain to lift your tones to the next level, but it also has a great passive three band equalizer to sculpt your tone!

Jimmy Page did not use distortion to mask his mistakes. He was all about tone. This circuit is an all Mosfet Stage circuit designed to emulate that sound based on their later albums. Clean, powerful and true.

Watch the Video:

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Build Document

Our version of this circuit while comparable to the RAH is not a clone nor to be misrepresented as a one. If you want the real thing we recommend you buy it.

All needed values of 16mm Right Angle Pots can be purchased at Small Bear in the USA or Das Musikding in Europe. Musikding carries Open Mini Jacks.

PedalPartsandKits also carries Open Mini Jacks - GuitarPCB Loves them


Volume: The best setting which is interactive with the Gain Control is just past unity volume - usually around 1:00. Many people find an additional boost or amp gain in tandem is an excellent creative option.

Gain: Best setting is from 3:00 to max for the best Zep-like response. But for a cleaner response you may want to try lower gain settings. Jimmy Page did not rely on distortion to cover his playing! All tone.

Tone Controls: The three bands of the tone section of the Black Dog function just like many power amp tone controls. They are passive instead of active. Therefore they do not increase the signal in their respective band but rather they decrease the signal. These bands are overlapping. So, a change in one band will also have an effect on the adjacent band. For example, if you start with the MIDDLE control at full CW, you will notice that the TREBLE control does not have as much effect on the tone. For this reason, we suggest that you start with all three tone controls at the mid-point and adjust from there.

You are sure to find a tonal setting that is just what you want

Stompbox Profile: Bass, Mid and Treble on top. Volume and Gain underneath.

Please note you may always choose to “hand wire” your potentiometers as well.

Recommended accessories:

1. Barry's Famous Pot Condoms™ .

2. 3PDT Wiring Boards .

3. Barry's Best Pedal Hookup Wire.

4. DPDT Wiring Boards - Perfect for Mods

5. DC Power Jacks 2.1mm

6. Common Anode LED (Optional to Standard LED)

7. Plastic Bezels for Common Anode LEDs

8. Pot Condoms for mounting in tight quarters over potentiometers

9. GPCB Secure Mounts - For mounting with room to spare

April 19, 2017 at 2:37 AM Flag Quote & Reply

Site Owner
Posts: 8793

Jimmy Page was not a "use a lot of distortion" to cover his mistakes kind of player. He was well known for his song writing and studio mixing skills. Maybe even more to some is his particular tone. This circuit "The Black Dog" is designed to give you this tone as a solid, tight over-drive.

Some may prefer a more overdriven type of sound for their own style of playing.

There are a few tricks some of which mister Jimmy employed himself to capture these tones.

He used a cocked Wah sound to maximize solo tones as well as create controlled feedback. He also used multiple pedals and amplifiers in tandem. While i am not going to write a book about that I am going to share one idea that compliments the Black Dog circuit very well.

One of the easiest Mods is to add a Boost. I suggest the Stage 3 Booster and in this case it also sounds nice as a Pre-Circuit Boost as opposed to a Post Circuit Boost.

See the diagram below courtesy of Wilkie1 for wiring as a Pre-Boost:

Of course there are other options. You may wire it as a Post-Circuit boost which will add less color and more transparency to your signal. As a Pre-Circuit Boost it will color the tone more and give more "Edge" to your tone.

Either way it works nicely like they are a match made in Heaven. Being that the Stage 3 Mini is only 1" x 1" it can easily be installed in the same enclosure with the Black Dog making it a fantastic Combo.

One final trick is to use either of our handy: Easy Order Switching Boards.

This way you can switch easily between Pre-Boost and Post-Boost tones.

April 21, 2017 at 12:26 PM Flag Quote & Reply

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