SG101 on the Web

Follow SurfGuitar101 on Twitter

Photo of the Day
Shoutbox

TheAmpFibian: People are always shocked to find out how bad of an electrician I am.
236 days ago

dragonfly: Pic of the day HBSM Jam 2012 was during my tenure. OMG do I miss those days but nowadays I couldn't handle it. No
219 days ago

dragonfly: Pic of the day OMG how I loved The Torquays and miss them very much. Yes
203 days ago

simoncoil: FWIW my guess for the ending of GoT was a surprising "Invasion fo the Dragonmen" (Hey-ho, hey-ho ...)
185 days ago

Surf_Skater: Congratulations JonPaul and Marie!
152 days ago

tubeswell: Anyone in Cali affected by the quakes?
139 days ago

Scrane255: Marty smith was my Uncle! Would like to see pictures of the nobles band
132 days ago

josheboy: Convention in 1 week!!
118 days ago

bigtikidude: 4 days and counting. Who's coming?
115 days ago

dragonfly: Has anyone heard the new Ford commercial with Dick Dale's Misirlou in the background? I have and it's awesome but too bad they waited till DD passed away. Long live the King!.
103 days ago

Please login or register to shout.

Current Polls

No polls at this time. Check out our past polls.

Current Contests

No contests at this time. Check out our past contests.

Donations

Help us meet our monthly goal:

56%

56%

Donate Now

SG101 Banner

SurfGuitar101 Forums » Gear »

Permalink Magnatone vibrato - technical details

New Topic
Page 1 of 1

Here is a very interesting document explaining all the technical details of the Magnatone Vibrato and even a way to replace the varistors with zeners.
(Hopefully, there are others here that find this interesting Smile )

http://dalmura.com.au/projects/Magnatone%20vibrato%20design.pdf

surfybear.weebly.com

I do, been studying this circuit and want to replicate it. Dinko from The Bambi Molesters did with incredible results ... A Night In Zagreb is the proof!

When you have to shoot ... shoot! Don't talk.
"Los Grainders" www.facebook.com/losgrainders
"Planeta Reverb" www.facebook.com/planetareverb

Nice to not be the only nerd here Smile
I have been struggling with a FET version some time now.
I learned two things; its important with a very clean sinewave LFO and that zeners are no good for a low voltage circuit.
Eventually I will get time finish the build.

surfybear.weebly.com

Oh yes, hopefully! That the device is already on my shopping list!

After 2 years work and lots of prototypes we have finally found a way to build a pedal version of the Magnatone pitch shifting vibrato! By replacing the tubes with jFETs and the varistors with a special diode array this fine circuit can be powered with a 9V battery.
More info will come soon.
Keep an eye on our website surfyindustries.com and our Facebook/Instagram pages!

surfybear.weebly.com

I'm looking forward to hearing it. I've tried the "Maggie" (real good but had some low-frequency clipping that I couldn't dial out, but great vibrato) and the "Magnavibe" (no low-frequency clipping but the effect was a bit disconnected)

I'm looking forward to hearing yours @bjoish

I’ve been rocking a Maggie pedal for a few years and dig the vibe heartily. It’s a very powerful effect whether set for subtle stereo washes between two amps or more obvious faster heavy pitch warble. Also does a Rotovibe thing when in stereo setting L&R outputs plug into a single channel of an overdriven tube amp. Like some kind of pre-psychedelic studio effect.

Squink Out!

Looking forward to hearing more Bjorn!

The Kahuna Kings

https://www.facebook.com/pages/The-Kahuna-Kings/459752090818447

https://thekahunakings.bandcamp.com/releases

Me too.....I'm pretty done with buying pedals (talk about going down the rabbit hole) but a really great pitch shifting Magnatone Vibrato pedal would be something I'd want to add to my pedalboard especially one with the Surfy Bear pedigree. Just an aside. If anyone is looking for a really nice (albeit low wattage) hand wired tube amp at a really decent price that features real on board tube driven pitch shifting Magnatone type vibrato, check out the DeLisle "Victorvibe" amp (www.delisleguitar.com). I have a DeLisle Nickle Box amp which is amazing and the Victorvibe is basically a Nicklebox with pitch shifting Vibrato.

Congrats! Can't wait to try it!

When you have to shoot ... shoot! Don't talk.
"Los Grainders" www.facebook.com/losgrainders
"Planeta Reverb" www.facebook.com/planetareverb

Fantastic Bjorn! Would be up for one of these, hopefully will be available in kit form like the Surfy Trem

Will you take a prototype to Livorno, Björn? I'm curious.

Frank

Absolutely! Smile
The plan is to havc this pedal for sale there!

surfybear.weebly.com

I would definitely need a Bjorn made turn-key pedal. I'm fairly handy with a basic guitar set-up but electronics and soldering I am basically clueless.
I did rewire a lamp once....but a chimp could do that. Laughing

Here are some technical details about the SurfyVibe pedal.
Here is a gut shot of the pedal. As you can see all parts are soldered to the board, no wires except for the battery connector. This makes the pedal very reliable.
There are no integrated circuits, the surface mount jFETs replace the tubes in the original schematic. You can also see the 4 special diode arrays that replace the 'legendary' varistors. The board is populated with >80 components.

image

surfybear.weebly.com

STEREO?

Squink Out!

As you can see, there was no space for a stereo circuit.
80 components just for mono!

surfybear.weebly.com

Tom is a regular over at the Music Electronics Forum. In that article, he briefly mentions the Hammond AO41 saturable inductor. A few years ago I obtained a couple of those and used one to build a stand-alone tube pitch-shifting vibrato unit. It can get into some very funky space warble territory. I'm going to build the other one into a guitar amp when I get a round tuit.
image
image
image
image

He who dies with the most tubes... wins

Surf Daddies

Interesting! Smile
I have never seen this type of vibrato circuit.

surfybear.weebly.com

Page 1 of 1
Top