x2fet and diefet preamp (www.techniguitare.com)

[mattthegamer463]

I was wondering, does anyone know if all the pots are linear? Or are they audio? Or a mix?

[mattthegamer463]

My X2FET so far, in a 1590B-size enclosure:

[mattthegamer463]

Done:

[deadastronaut]

my god does this x2fet really sound this bad..was gonna build this...nothing like dime bag...

http://www.youtube.com/watch?v=fQV1s0KHeOc

dont think i'll bother going by this crap video....or does it not do it justice?...

proper soundclip anyone?...........

rob.

[therecordingart]

my god does this x2fet really sound this bad..was gonna build this...nothing like dime bag...

http://www.youtube.com/watch?v=fQV1s0KHeOc

dont think i'll bother going by this crap video....or does it not do it justice?...

proper soundclip anyone?...........

rob.

Bump for X2Fet sound clips.

[anti-idiot]

+1 (soundclips)

[edvard]

This thread, Page 1, 5th post down, under "X2Fet".
Look for the .mp3 links

BTW - Back in the "Cowboys from Hell" days, Dimebag (er, 'Diamond' then...) used to shill for Randall amps.
Maybe a conversion of his favorite from then would be in order as well...

[anti-idiot]

i think he meant "new" soundclips

[edvard]

Oh.
OK.

P.S. I just looked it up, the Warhead was a Randall  , and it was solid state  .

[therecordingart]

Oh.
OK.

P.S. I just looked it up, the Warhead was a Randall  , and it was solid state  .

Dime used solid state amps through his entire career until the Damageplan days which he then started using Krank amps. The funny thing is that he only used the Warhead for the clean channel because he didn't like the distortion channel as much as his trusty RG100. Straight from Grady's mouth (Dime's tech).

[edvard]

Far out...
FWIW, the X2 circuit here sounds fine by me, but I wonder what a RG100 clone would do?

EDIT: never mind...
http://www.diystompboxes.com/smfforum/index.php?topic=79923.0
Full schem if anyone's interested:
http://www.schematicheaven.com/newamps/randall_rg100es-rg80es.pdf
Oops, seems schematicheaven is down ATM, try here:
http://www.eserviceinfo.com/downloadsm/50842/Randall_RG80,%20RG100.html

[Xaar]

X2Fet is absolutely not an emulator of the X2 warhead, it's a chopped down simplified 9V version of the original 24V

From reading the original schematic of the solid state Randall X2:
what's missing:
-everything between the 0.01µF input cap to the gate of the first transistor (in fact a section comprising one channel of a TL072)

- J201 FETs replace original 2N5484.

-33k biasing resistors on drains are replaced now with trimpots. Voltage supply is filtered with different components too (example: original 1000µF caps to ground on each 24V supply ( to thed rain of each transistor) is now replaced with 100µF caps

-apart from these mods,everything between the gate of the first trans and the output after the twin diode clipping stage is --exactly-- the same values.

- after the diode clipping stage, the whole original EQ + presence circuit (comprising 4 TL072 chips) and the output stage (one NE5532 chip ) is replaced with a passive simplistic eq in the x2fet.

-new simplified eq is placed --before-- the master pot, master pot which is now augmented to 100k

Originally there were a "mid level" "mid freq" "density" and "presence" controls , all omitted in the J2O1 x2fet version.
It seems pointless to sculpt a metal tone without a precise mid control. Only my opinion.

Another thing: 9V will reduce significantly the headroom compared to 24V in the first design

[caspercody]

Do you have the schematic for the X2? And can you post it? I did make the X2FET pedal, and I like it, but always looking to see if can make better.


Thanks
Rob