Doctor Trebor

Project Overview

Introducing Dr. Trebor, the affordable way to experience the Vox UL730 Amplifier!

I don’t know about you, but I’ve never got the chance to try the real thing, and I probably could never afford one. That’s a pity because the Legendary Vox UL 730 can be heard beautifully used by the Beatles, Rolling Stones, The Who, Jimmy Page, and many other legends.

The solution? It’s called Dr. Trebor, an uncanny replica of the original that ensures great sound quality at an unbeatable price.

Introduction

Since I was young, I’ve been captivated by the Beatles’ dreamy guitar sounds. Just listen to Revolver, Sgt. Pepper’s and Magical Mystery Tour, and you will know exactly what I’m talking about.

The liable for those unique sounds? A series of Vox Amps’ hybrids and solid-state models that were used not only by the Beatles but also by many other superstars at the time.

You may say I’m a dreamer, but I’m not the only one, because many like me would love to have one of those amazing amps in their hands at all costs! Well, that may be an exaggeration if we consider that the originals can go over €12,000.

“Don’t let me down,” you may be thinking at this point, and don’t worry, I won’t because here comes the sun:

It turns out that some very driving people at Aclam Guitars, Barcelona, encountered one of these rare amps and spent the best part of a year recasting its magic into a pedal which they appropriately called Dr. Robert. It’s a lot of fun, very authentic sounding that makes you twist and shout just by hearing it!

Inspired by that amazing pedal, our Dr. Trebor also encapsulates the shared sonic attributes of the Vox amps of that period. You can nail all those acclaimed tones with a simple but effective control set. Just connect the pedal and enjoy while your guitar gently weeps.

The board is as unique as the amp it’s inspired. On the UL730, Vox separated the midrange control from the rest of the EQ stack, situating it before the volume pot and upstream from the bass and treble controls. Dr. Trebor’s guts are wired similarly, which means that the midrange shapes the pedal’s tone and gain profile profoundly before interacting with an amplifier’s bass/treble tone stack.

So, what are you waiting for? Now is your time to take a sad song and make it better. And remember, “all you need is love,” but if you also have an affordable Vox UL730 Amplifier in a box, much better!  

Controls

Potentiometers

• Bass
• Bass-P
• Gain-B
• Treble
• Treble-P

Switches

• Mach-Schau

For any technical questions regarding this build don’t forget to check out our Facebook Group and our forum at Free Stomp Boxes.

Dr Trebor 1v1 – Building Docs

Dr. Trebor 1v0 – Building Docs

Dr. Trebor – Drilling templates