Saturday, 29 September 2007 15:53
In this article we’ll take a look at other EH delays that are AC-powered. For battery-operated units, go Here
Here’s an oddball EH delay: the Echo 600. Imagine a 7 knob Deluxe Memory Man pedal, but with slide pots instead of rotary controls. I have only seen a bare handful of these units over the years (as I’ve also done with the Stereo Slapback Echo). You can control the input and output volumes and blend, speed and depth of the chorus/vibrato, and delay and feedback of the echo. There’s also a SHORT/LONG switch for setting overall delay times. It probably came out in the late 70’s or very early 80’s and featured 600ms of delay.
EH Designer Howard Davis came up with the AMBITRON, a unit to synthesize a stereo effect from a mono input. It was available in at least 2 forms: the floor unit made for guitar use and a rackmount stereo unit for home stereo use. Howard says he designed the Ambitron to get a stereo effect from his mono jazz LPs. Good show, Howard!
Another rarely seen delay is the Solid State Reverb also known during it’s development phase as the Reverbatron. Basically, a Memory Man with very short delay, it uses a difficult-to-find-and-expensive-when-you-do delay IC, the MN3011. Notice the plugged hole near the FEEDBACK control. Every one of these units I’ve seen (all 3 or 4 of them) has had this. According to the schematic the pedal was going to have a 5th knob, labeled Sustain, but EH apparently changed their mind shortly before production.
