Fulltone Fulldrive Schematic

[KerryF]

Yes, I have searched in the forum, but I cant find the schematic for this.  I have seen a few links, but when I click on them, they are expired.  If anyone could just help me out with a schematic, or even a layout, that would be nice.

thanks

[hairyandy]

When in doubt, Google:

http://www.generalguitargadgets.com/index.php?%20option=content&task=view&id=90&Itemid=118

Although I just happened to remember that it was referred to as the "Fulldive".

[Torchy]

Ive mailed you the full project in a zip file.

[KerryF]

Awsome everyone!  Thanks!

[george]

isn't it just a tube screamer with a couple of changed components and modified opamp feedback loop circuit?

[phaeton]

isn't it just a tube screamer with a couple of changed components and modified opamp feedback loop circuit?

Isn't everything?   

[mojotron]

isn't it just a tube screamer with a couple of changed components and modified opamp feedback loop circuit?

Isn't everything?   

Well, the quality of components is pretty important too. You have to use decent parts to get as good of a result as Fulltone. That said, if you use BB or try some other opamps you could have something even nicer than the FD2.

[MartyMart]

I had the obvious "JRC4558D" in mine to start with and after several swops, settled on an LM833
Seems to have a good overall tone to me and is quiet too.
The "swop opamp and remember the last tone" get's kind of difficult though ... without 2x units !

MM.

[Bernardduur]

I really dig the ones with a LM308 and a TL071 in it (308 for the feedback loop); the sound gets so "bassy" and well articulated.

[blues]

Hi,
Here is a link :
http://members.surfeu.fi/jouni.tukiainen/schem_frame.html
Regards,
blues

[george]

isn't it just a tube screamer with a couple of changed components and modified opamp feedback loop circuit?

Isn't everything?   

yeah well that's your particular universe I guess ...

my point is, you could just get a TS PCB from tonepad (or vero layout from Torchy  or whatever) change a few components and modify your off-board wiring and ...

voila!  instant fooldrive!

I just think there's maybe easier ways to get to JRC4558d heaven, is all

[beatstrat]

Speaking of 'Tonal Heaven' - I can't get my homemade TS-type to sound like the store-bought model.  It is tonally dark - like the tone control is rolled most of the way off or something.  It sounds too bright when the tone knob is at '10' and too dark anywhere below that.  I was using a 0.22uf cap in the tone pot spot, but have reduced that to 0.1uf and now to 0.047uf - it's gotten a little better, but is not 'correct'.  Any help would be greatly appreciated.  I'm using the std/suggested pot value for the tone knob and also most other parts are as scripted; the only changes being 3.3K/0.1uf @ pin 2 and clipping diode selection.

A forum search turned up info stating that this is a common issue, although I didn't find a fix for it in my search.  Any tips?

Thanks.

[Toney]

When you say the "correct" tone pot, you're referring to the w taper one, right?

It's the first thing I'd think of from your description.

[Bernardduur]

Did you use a 22k pot or an 25k pot?

[cd]

I love it how this has become public domain knowledge that is freely discussed.  I once briefly mentioned how to mod a TS into something approaching a FD and got a nasty lawsuit this, lawsuit that email from Fulltone.

[phaeton]

I love it how this has become public domain knowledge that is freely discussed.  I once briefly mentioned how to mod a TS into something approaching a FD and got a nasty lawsuit this, lawsuit that email from Fulltone.

That's just plain silly.  Aren't a majority of the TS mods about as old as the TS?

Maybe it's all TS lore, but i *do* recall reading about sometime in the 1980s that junking the JRC4558D and dropping in something from the TL0x2 family was all the rage for awhile, at least until the whole 'retro' thing of the early-mid 90s brought it all back around.

I dunno.  I used my TS in a metal context in the 1980s and 1990s.

if that's your particular universe

Not exactly, but the TS *is* a great circuit.  It's not the be all end all of everything, but out of all the sundry distortion-makers out there, it's one of the winners for sure.

[beatstrat]

Toney/Bernard,

I'm using a 25K-B pot.

[burnt fingers]

I love it how this has become public domain knowledge that is freely discussed.  I once briefly mentioned how to mod a TS into something approaching a FD and got a nasty lawsuit this, lawsuit that email from Fulltone.

That's funny.  Mike probably took all his ideas for the fulldrive from forums like this to begin with.

Scott

[Bernardduur]

Toney/Bernard,

I'm using a 25K-B pot.

Sorry, is that log or lin?

I used a 25k pot, lin, that worked great and got very close to the real thing

[cd]

I love it how this has become public domain knowledge that is freely discussed.  I once briefly mentioned how to mod a TS into something approaching a FD and got a nasty lawsuit this, lawsuit that email from Fulltone.

That's funny.  Mike probably took all his ideas for the fulldrive from forums like this to begin with.

Not likely, Fulltone was building pedals in 1995, which predates even the original Ampage FX section.  Back then posting about FX was limited to Usenet.