Echoplex Preamp Tribute
I built this pretty much exactly as per the Ares specs.
I bought a handful of 2N5484 and 2N5485 transistors and tested them using the tagboardeffects “Greatly Improved JFET Matcher”. I found a good pair – IDSS for Q1 (2N5484) was 2.94mA and IDSS for Q2 (2N5485) was 7.51mA.
I wanted it to look more like the Echoplex Preamp pedal so I centred the pot, added a chicken-head knob, and side-mounted the Fat switch. The artwork completed the look.
I’m pretty happy with the result!
Sound-wise, I prefer the bright “early version” EP-3 position on the Fat switch and leave the Volume knob at about 1 o’clock. I place it at the end of my pedal chain, just prior to the amp and use it as a solo boost. It pushes the tubes just enough to provide a bit more drive/compression, whilst the brightness edges it above the mix for solos. Nice!
Note: Be careful of the third position of the Fat switch – it’ll blow your head off! 🙂 I might re-consider the capacitor value for that switch selection.
Modifications or part substitutions
Centre mounted the pot and side-mounted the Fat switch.