About a year ago I took one of these things apart and anchored the bottom end of the spring into a hole carefully drilled through the center of a peizo element ripped out of a dollar store alarm buzzer. Soldered on a thrift shop mic cable to the peizo leads, then reassembled it, resulting in an actual functioning mic with integrated spring tank.
thanks for posting this. i’m finally getting the respect i deserve for my beautiful craftsmanship. pink plastic and black duct tape? i might have to cry myself to sleep tonight.
so how many people are building one?
i know i'm going to have to build this guys piezo version. someone else was going to do one with an electric guitar pickup. oh and don't forget about attaching the spring directly to a speaker and every other way this has been done before.
http://www.electronicpeasant.com/ has some very cool stuff, leagues ahead of me. i’ve had my eye out for one of those displays so i can build his verb
There is another cheap delay device...if you own a three-head-tape-recorder. Just use the recording monitor with gives you a short delay during the recording. mix together input and output signal and there is your vintage delay/echo effect.