Ghost Device

Project overview

Based on the EQD Ghost echo, here comes a reverb design that does not require DSP chips and SMD soldering. Build around a PT2399 Chip and a Belton Brick module all sounds between slight rooms and spooking ambient fit on this still beginner-friendly

While you can get subtle and lovely always-on sounds out of this little wonder, its main business are ambient sounds, volume swells, and haunting Room deflections with only three easy to dial Knobs. Definitely a ghost summoning device!

Introduction

Perfect Analog/digital combination, mixing the best from the Belton BTDR-2H-L digital reverb module and the classic PT2399. The result is a spectacular spring reverb emulation machine that boasts a terrifying 30ms – 150ms of pre-delay, controllable via the Attack knob, for everything from a quick rockabilly slapback to viscous pools of ectoplasmic reverberations.

Before the break out of the FV-1 ICs, the Belton brick was, without doubt, the ultimate resource to build reverb pedals. In early 2010 we have seen many reverb pedals based on this technology (a Belton brick is basically a group of SMD PT2399 in chain) like Wampler Faux spring reverb, Culture Jam Box of hall, and more. Most of these reverbs aimed to replicate the spring reverb section of the traditional amp to give you that extra wetness on your tone, but EQD took a totally different approach to designing the Ghost Echo. As for sure, you are familiarized with EQD designs. These guys always give an outside-the-box perspective to each of their creations, and the Ghost Echo is not an exception. This pedal aims to be a standalone atmospheric machine to create dreamy and haunting textures instead of just emulating a spring reverb.

The key of this design is how the delay from the pt2399 mixes with the Belton brick. After the first Opamp, the signal splits into two dry and wet signals. The wet signal goes into the p2399 and connects with the Dwell pot as well. The modulated from the pt2399 hits the Belton brick, creating in this way this deep, dreamy atmospheric sound that transports us to an ethereal dimension!

Controls

• Attack
• Depth
• Dwell

For further analysis on this circuit take a look at this thread on Free Stomp Boxes Forum.

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

Ghost Device 1v2 – Building Docs (3rd January 2022)

Ghost Device 1v2 – Building Docs (14th April 2022)

Ghost Device 1v2 – Building Docs (25th August 2019)

Ghost Device – Drilling Template