Page 1 of 2
Fulltone - Fat-Boost
Posted: 12 Jul 2007, 01:46
by analogguru
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
analogguru
Posted: 12 Jul 2007, 02:27
by call1800ksmyazz
Posted: 12 Jul 2007, 10:37
by tuemmueh
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!
Posted: 13 Jul 2007, 14:02
by Ed G.
Y'all know who the employee is, don't you?
Posted: 13 Jul 2007, 14:06
by invictus
Ed G. wrote:Y'all know who the employee is, don't you?
PURETUBE?.....
..
Posted: 13 Jul 2007, 15:26
by Ed G.
No.
Posted: 13 Jul 2007, 15:32
by Igloo
Go on then!
Posted: 13 Jul 2007, 16:03
by Guilherme
a former employee (now with another effects company)
There are threads in this same subforum about this other company
Posted: 13 Jul 2007, 16:23
by call1800ksmyazz
Zvex?
Posted: 13 Jul 2007, 16:28
by Guilherme
No.
Posted: 13 Jul 2007, 16:34
by modman
this is going to be a long thread
Posted: 13 Jul 2007, 18:16
by Igloo
Well ?
Posted: 13 Jul 2007, 18:39
by analogguru
There are threads in this same subforum...
To narrow it down:
Thread
s would be about Lovetone, Xotic and HBE...
analogguru
Posted: 13 Jul 2007, 20:42
by Ed G.
Of those three, it would be the last one, alphabetically speaking.
Posted: 13 Jul 2007, 20:45
by briggs
Xotic! I win! I never really think of Xotic as a booteek manufacturer.
(It is Xotic right
)
Posted: 14 Jul 2007, 02:38
by bajaman
OOps - I missed that - but it sure looked like fun - love the dancing elephant
Re: Fulltone - Fat-Boost
Posted: 15 Oct 2010, 19:00
by Lawnchair
Anyone know the differences between the FB-2 and 3? I have a 2 coming and want to hack into it of course.
Re: Fulltone - Fat-Boost
Posted: 19 Jul 2011, 21:30
by snail
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
https://imageshack.us/photo/my-images/5 ... 1403c.jpg/
https://imageshack.us/photo/my-images/3 ... 404dn.jpg/
https://imageshack.us/photo/my-images/6 ... 1405f.jpg/
schematic
https://imageshack.us/photo/my-images/8 ... 1406n.jpg/
Re: Fulltone - Fat-Boost
Posted: 20 Jul 2011, 19:09
by RnFR
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!
they just moved the gain control to the source.
Re: Fulltone - Fat-Boost
Posted: 21 Jul 2011, 10:44
by snail
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!!
Snail
