Fulltone - Fat-Boost

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Fulltone - Fat-Boost

Postby analogguru » 12 Jul 2007, 02:46

Here is an: article (with schematic) for the Fulltone Fat-Boost

Here: http://www.muzique.com/newsletter.htm you can read:


=================================================
Fulltone Fat Boost
=================================================
It has now been confirmed the Fulltone Fat Boost is a modified AMZ Mini-Booster! I have now personally seen the device (thanks to the person who shipped it to me) and verified that this is true.

The Fat Boost schematic was recently posted on a web page along with a review, and shows how the circuit was modified by adding an input trim pot and a tone control on the output; but otherwise it is basically the Mini-Booster circuit that was available for download on the AMZ web site for several years and is detailed in an article on the AMZ CD.

If you would like to see the original schematic, visit the AMZ Mini-Booster page:

http://www.muzique.com/amz/mini.htm



Guts ?:

Fulltone Fat-Boost inside

modman posted the original NS application note here:
http://www.phpbbserver.com/freestompbox ... stompboxes

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Postby call1800ksmyazz » 12 Jul 2007, 03:27

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Postby tuemmueh » 12 Jul 2007, 11:37

But Fulltone says on his homepage that he designed a new circuit ... Not that I trust this guy after lying about the miniboost-copy for some years, but I'm interested if it's true and which circuit he stole this time ;)

Design/Rumor Note: Rev2 version of the Fatboost is my design. The older (pre 11 position detented knob) version was brought to me as a supposed original design by a former employee (now with another effects company) and turned out to be VERY close to Jack Orman's Mini Booster (which BTW is eerily close to a circuit off of an old National Semiconductor FET application note;) When I was made aware of this in 2003, I immediately revamped/improved the Fatboost, Jack was paid in full for all "pre-detent versions" ever made, and the employee was sent packing. Now you know the real story.


such a BAD, BAD employee! :lol:
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Postby Ed G. » 13 Jul 2007, 15:02

Y'all know who the employee is, don't you?
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Postby invictus » 13 Jul 2007, 15:06

Ed G. wrote:Y'all know who the employee is, don't you?




PURETUBE?..... :twisted: :twisted: :twisted:


..
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Postby Ed G. » 13 Jul 2007, 16:26

No.
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Postby Igloo » 13 Jul 2007, 16:32

Go on then!
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Postby Guilherme » 13 Jul 2007, 17:03

a former employee (now with another effects company)


There are threads in this same subforum about this other company :)
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Postby call1800ksmyazz » 13 Jul 2007, 17:23

Zvex? :wink:
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Postby Guilherme » 13 Jul 2007, 17:28

No.
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Postby modman » 13 Jul 2007, 17:34

:roll:

this is going to be a long thread :!:
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Postby Igloo » 13 Jul 2007, 19:16

Image

Well ?

Image
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Postby analogguru » 13 Jul 2007, 19:39

There are threads in this same subforum...


To narrow it down:
Threads would be about Lovetone, Xotic and HBE...

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Postby Ed G. » 13 Jul 2007, 21:42

Of those three, it would be the last one, alphabetically speaking.
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Postby briggs » 13 Jul 2007, 21:45

Xotic! I win! I never really think of Xotic as a booteek manufacturer.

(It is Xotic right :shock: )
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Postby bajaman » 14 Jul 2007, 03:38

OOps - I missed that - but it sure looked like fun - love the dancing elephant :D :wink:
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Re: Fulltone - Fat-Boost

Postby Lawnchair » 15 Oct 2010, 20:00

Anyone know the differences between the FB-2 and 3? I have a 2 coming and want to hack into it of course.
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Re: Fulltone - Fat-Boost

Postby snail » 19 Jul 2011, 22:30

Hi Guys
just came upon this one and it has really puzzled me. This is a Fulltone Fat Boost V1 (one tone knob) and it is rather different than all the schematics I've seen floating arround for ages. To start off it's nof a Mu Amp arrangement and the gain is done via source biasing and not like a pre gain pot... or my tracing skills are really bad, but without further ado this is what I've come up with. Can anyone relate to that circuit in any way or claim similarities with the old AMZ fet boost???

Cheers

snail

http://imageshack.us/photo/my-images/593/dsc01403c.jpg/

http://imageshack.us/photo/my-images/33/dsc01404dn.jpg/

http://imageshack.us/photo/my-images/600/dsc01405f.jpg/

schematic
http://imageshack.us/photo/my-images/856/dsc01406n.jpg/
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Re: Fulltone - Fat-Boost

Postby RnFR » 20 Jul 2011, 20:09

you sure you've got the pinout right on that second FET? if you switch D and S, it looks a lot like a mu amp to me! :wink: they just moved the gain control to the source.
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Re: Fulltone - Fat-Boost

Postby snail » 21 Jul 2011, 11:44

Thanks for the input RnFR, it does make a lot of sense, I'll try to match the trail to the top layer and see that since I put the pedal back together, but I kind of checked this a few times and got to the same conclusion. They wouldnt use different pinout 5457 would they?
Thanks!!
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