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Old 20th Feb 2007, 5:09 pm   #1
Merlin
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Join Date: Apr 2006
Location: Shrewsbury, Shropshire, UK.
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Default 'Finished; Vibrato / Tremolo for guitar!

I've finally finished my valve vibrato unit; the "Worthington Vibrotron"! Inspired by the articles on www.thermionic.info, I've always wanted to try out a true vibrato effect.
I happened to have a small 150V tranformer that didn't seem much good for an amp, so I created this instead using a pair of ECC81s and an ECC82 (because they're cheap, like me). Seems to work pretty well, especially on high freq' settings. When set to "Trem" only, you can get almost a stutter effect- the waveform looks pretty cool! One nice feature of this is that the indicator LED flashes in time with the oscillator. Now all I need is some sort of grill for the front and back.

Pics & Schem: http://s81.photobucket.com/albums/j2...owe/Vibrotron/

Clips: (I think you have to copy and paste these addresses into your browser by hand)
Vibrato: www.freewebs.com/valvewizard1/Vibe.mp3
Tremolo: www.freewebs.com/valvewizard1/Trem.mp3
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Old 23rd May 2007, 12:24 pm   #2
Dr Rubberfunk
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Location: SW London
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Default Re: 'Finished; Vibrato / Tremolo for guitar!

Nice! Looks and sounds superb! I'd really like to get into doing some DIY fx projects - was thinking of buying one of these fx pedal kits to practice my skills on. I find valves a bit frightening to be honest

That said, I've got an old colorsound overdriver pedal that doesn't work that I keep saying I'll try and fix ...

Anyway - good job on the Vibotron!
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