Hoffman Amplifiers Tube Amplifier Forum
Other Stuff => Effects => Topic started by: jubal81 on March 05, 2014, 09:02:44 pm
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I've been thinking about how to get a ReVibe into a pedal since I stumbled onto EL34World a couple years ago and was just blown away by the Hoffman ReVibe. Not quite the same as the real deal, but I'm really pleased with how it turned out.
Constituent circuits:
Surfy Bear FET Reverb (http://surfybear.weebly.com/fet-reverb---project.html)
Cardinal Tremolo (http://1776effects.com/store/)
Custom split/mix circuit for parallel operation
Madbean Bloviator (http://www.madbeanpedals.com/projects/index.html) (used as switchable output buffer)
Two 1776 relay bypass boards (http://1776effects.com/store/)
Other parts:
Hammond 10" x 6" x 2" amp chassis with walnut sides
Accutronics 8AB2A1B reverb tank (spring unit remounted inside hammond chassis)
Custom faceplate designed by me and laser etched by Mojotone
The Rundown:
The Sufy Bear Reverb uses FETs to emulate the 6G15, with a MOSFET pair driving the tank. I've got this running in a parallel configuration with Midayfair's Cardinal Tremolo, which uses FETs and optocouplers to get a sound similar to the Fender tremolos. The modulation settings you see on a rotary switch are Black (bias), Brown (harmonic) and Vibe (a univibe-ish sound).
Running in parallel sacrifices the extreme settings of both effects, but the overall lushness of parallel operation was just too good to pass up.
For switching, the soft-touch, momentary switches (thanks to the relay boards) make a big difference because you don't want a hard click clanging the springs. The left switch bypasses the whole unit, while the right switch turns the modulation on & off. I used an Opto Fet to make the Modulation indicator light flash in time with the speed of the effect.
The Bloviator (Sonic Stomp workalike) on the output is independent and switches on the back. It was on during all the demo samples.
(http://cl.ly/image/0R130e0C1z3K/ReVibe1.JPG)
(http://cl.ly/image/0s1I3B2g2K08/ReVibe2.JPG)
(http://cl.ly/image/1S2s0i2a0K3s/ReVibe3.JPG)
(http://cl.ly/image/1D2L3c2H3t10/ReVibe4.JPG)
(http://cl.ly/image/3f0y3j1m0x2W/ReVibe5.JPG)
Revibe pedal demo (http://www.youtube.com/watch?v=CyloJz7BMCY#ws)
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That is beautiful work!
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Tweed chassis is a nice touch. Walnut end pieces and black control panel add a lot of eye appeal. Great job!
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Cool, nice work. It has a really nice sound. Thanks for showing it. :thumbsup:
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Beautiful execution, thanks for sharing!
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WOW! Beautiful work and it sounds really good! Nice playing, btw!
Jim
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Playing devils advocate... are you sure its not just revealing the roominess that is there anyway but masked by the hum when the pedal is not engaged?
EL34 admin: Gekka, this is what you choose to type for your first post on the forum?
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... are you sure its not just revealing the roominess that is there anyway but masked by the hum when the pedal is not engaged?
At what time-stamp in the video did you hear hum?
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Wow! that's high quality stuff mate. My fav sound is the Reverb and 'Black' Trem at the 1:45 min mark. Some of you guys on the forum set the bar so high it's almost depressing but if I ever get this good at building DIY's I'll know I have reached the mountain top.
:icon_biggrin:
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Very well done.
I'd be afraid to ever use it because the bottoms of my shoes would have that tweed looking pretty grungy pretty quickly. :l2: