'SPITFIRE' Metal 'n' Blues Pedal...

[deadastronaut]

this is with 3.3n/6.8n...

switching between..messing around n stuff......

http://dl.dropbox.com/u/7464107/3.3n6.8ncaps.mp3

[WGTP]

So that's what your doing with this thing.  Sounds good. 

[J0K3RX]

this is with 3.3n/6.8n...

switching between..messing around n stuff......

http://dl.dropbox.com/u/7464107/3.3n6.8ncaps.mp3

I lean more towards the 2nd tone but I like the 1st tone also.... Sounds real damn good!!! Ok, now I am gonna have to make this thing again... This will be like the 5th board I have made of this pedal

[deadastronaut]

yeah sounds great...i socketed those so i could mess around, i attached my cap sub box to it and went through all values...

but its definately best in the realms of 2.2.-10n........i settled for 3.3/6.8....

[WGTP]

I need to experiment with a 50k pot replacing the resistor in the tonestack. 

[deadastronaut]

^ yeah i stuck with a 47k lin, i did experiment with different values across the outer lugs (croc clipping my sub box on)...had interesting results...

and different taper/range /tighter sounds too.. i kept it as standard in the end though....


i fancy the next one i build/bread i'll try and tame that pots top end though.....


got a little angel on bread at mo....i'm after an alex lifeson sund out of the spit and la... 

[WGTP]

Just looking at Xbananov stuff.  C7 should be 2.2uf, but anything from 4.7uf to .22uf will affect the "Body" of the circuit.

[deadastronaut]

i'm about to put this on bread again, just for future tinkering sake...so i'll give those values a try !! ...

edit: got it on bread again!....    i wanted to attack that hi treble and tame it on the tone pot...sorted it.., instead of a 10k to the 1uf....try a 8.2-6.8-5.6k......

it puts the tone at 12oclock position on a 50k pot.... ....i'm getting mass oscillation due to breadboard, but its still great fun messing with this monster, i love the subtlety too...best of both worlds...

[WGTP]

Decreasing the R13 - 10k resistor will increase the low mids, reduce and raise the midrange notch to a higher frequency.  That is where I was talking about adding a 50k pot as a Low Mid/Body control.

Increasing the C7 cap to 1uf will also increase the mids in the distortion section.

For oscillation and taming the highs, try a 1n to 4.7n cap between R6 and Q4 and/or between Q3 and Q5.  Using a smaller cap in both places may be preferable to using 1 larger value cap in one place.  Keep spitting. 

[deadastronaut]

Decreasing the R13 - 10k resistor will increase the low mids, reduce and raise the midrange notch to a higher frequency.  That is where I was talking about adding a 50k pot as a Low Mid/Body control.

i thought thats what you were talking about, i tried the anti-bread-oscillation tricks, but no joy, still sounds like the fat bloke on deliverance..

maybe if i laid it out tighter/neater it might sort it out....

[J0K3RX]

Decreasing the R13 - 10k resistor will increase the low mids, reduce and raise the midrange notch to a higher frequency.  That is where I was talking about adding a 50k pot as a Low Mid/Body control.

still sounds like the fat bloke on deliverance..

Ha ha ha!!! Is ver 4 pretty stable? I am gonna give it a try... Anything new going on with it I should know about before I wade neck deep into this build? lol - Seems like there is always a couple mods right in the middle of it every time I etch a new board for this thing! It's a good thing, I just gotta get my timing right 

[deadastronaut]

dunno on v4...never tried it..unverified...


ive been messing around right now with adding a 47n to ground on the left side of C15 (1uf)...tends to get a bit tighter....might be good for recording...

also ive twiddled around with that 10k (r13) at the same time with varying results..

i would suggest having a dedicated breadboard for this as its very tweakable....i have now! ..apart rom the @#$%ing squeeeeeellll piggy stuff...


edit:  heres a clip of the 3.3n modern, with the 47n cap to ground (thrash mod) ....then with just the 3.3n, then back to the (thrash mod) 47n...i really like it...
it feels nice under your hand... i had to keep the gain down (9'0clock) to hold back squeeeelllll but you get the idea!...
http://dl.dropbox.com/u/7464107/modern1%262thrashmod.mp3




edit 2:  heres another clip,  riff 1=3.3n modern/ riff2:=3.3n modern with 47n mod/ riff 3:=6.8n/ riff4:=6.8n with 47n mod...

http://dl.dropbox.com/u/7464107/moderntests.mp3

[Maik]

Holy shit, I loose the second time! Don´t know why. Spitfire works for 2-3min, then it half the volume and the sound is thin.
When I hit the strings it starts as a normal distorted sound (with half volume) and then it sounds like "brrrrsssrrr". Seems like the sound breaks.
Have 2 wonderfull boxes and nothing usable to put in. One is a gift...
Must get them to work.

[deadastronaut]

sorry to hear your probs man....check the usual stuff, joints , cap orientation etc.....did you socket the fets?..did you toast one?...

i had a similar prob, but it turned out to be the worlds tiiniest bit of solder betweeen the tone caps...get the old magnifier out...

meanwhile!...da da da da da da daaaaaaa..

SPITFIRE V5  

[J0K3RX]

Hey Rob, that sounds real good man!! You gonna post the PCB? No biggie, I can redraw it myself if not.. But I will just use yours if I can?

Thanks,
Jim

[deadastronaut]

whoops yes of course!...that would help eh!..

http://dl.dropbox.com/u/7464107/SPITFIREV5THRASHER.pdf

http://dl.dropbox.com/u/7464107/SPITFIREV5PCB.pdf

for those that are interested in the fuzzy part of things heres a clip  using different caps,  22n/10n/4.7n/2.2n...
http://dl.dropbox.com/u/7464107/spit5fuzzcaps.mp3

[Maik]

I thought this morning: perhaps it´s the etching, a broken line. Have to test it today, also need to etch V5 
Some day I will have V3 to V....20? 

[deadastronaut]

good luck man, its really bugging when its nothing obvious....

and yes indeed v2000.....

i'm looking into tonestacks again...so there may be the 'ULTIMATE SPITFIRE'....

or V666

[Maik]

OK then, lets do V666

[deadastronaut]

  i'm on it...