Short story.. Reverb+Chorus pedal I built from scratch for fun. I named it Revorus as the combined words. The K for my first initial. It sounds cool on guitars and mics. I plan on publishing the schematic to some sites and maybe books.
Long story.. Built this pedal from absolute scratch. I didn't even have a schematic to work with so I was forced to build from the bench on a breadboard first. Uses a MN3207 Bucket Brigade Device (BBD) to create reverb and chorus. I used a 7414 chip as two timers, one square two phase for the BBD chip and one to create a triangle wave to drive the chorus frequency wobble effect. 5 dials on it to allow for just reverb, or reverberated chorus. Chorus and reverb both have their own speeds and levels, and a feedback level. All together there is two IC chips, 4 transistors for balanced amplifiers. I know I could have used OP amps but I wanted to go REAL old school with this. 1 more transistor to drive an internal LED light that is driven by the triangle wave to change a photoresistors value for the chorus wobble. Phase and wave form is correct on its output. Delay up to 1/2 second and chorus that can bend notes more than BB King if dials are fully clockwise.
Pictures..
Don't know if we have any guitar players here but hey figured why not post it right? I may even use it on air for mic reverb.
Using long delays causes a lot of noise and harmonics but when sped up it is decent. Problem with the BBD is that the square wave clock leaks into the audio. There is a small variable resistor on the circuit board to balance out the clock signal from getting into the audio. When the clock is above the human hearing range for when using chorus you can't notice it in the audio but the VU meter lets you know it's there It's not professional but it was fun to build and I can get some unique reverb and chorus out of it. The chorus sounds as good as brand name pedals.
Those Cool Cat pedals sure do look interesting. I haven't had a chance to play on one of them yet. Only pedal I have right now is a BOSS distortion. If I can find some long flexible springs I want to try and make a spring reverb but problem is I have no idea where I would find springs quite like that. I wonder what part of a slinky toy would sound like? ;D
I figured spring reverb would sound cool on air also for voice kind of like what WFAT did. I wonder if they used plate reverb or spring? Either way voice would definitely stand out on the station using any one of these effects causing people to tune in to see what it is
Most voice reverbs use some sort of digital delay. I swear Radio Australia uses one on one of their programs and I know radio China does... it actually bumps up the average power a tad if not overdone.
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