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

[J0K3RX]

Looks like you guys are coming up with some cool stuff! I sure wish there were some sound demos though... Doesn't have to be a youtube clip, just a simple mp3 on dropbox...maybe  I have reverted back to the original with the 3 switches, not because I like switches but because I am able to get the best tone from that build so far...   Keep on tweakin!

[deadastronaut]

hmmmm... ive just built a spitv3,

but theres no bass in it...ive built it to usual spec, all traces are fine, switch is working fine, its just weird, (i have another with exact same parts to compare)

the tone (47kb) when fully anti clockwise is still bright but still working ok but not got that full bass......maybe ive toasted a cap is my guess,

what would you guys swap out...

c8 - 470nf
or c12 - 1uf (np)
or the 2.2n's.....c14/15...

[J0K3RX]

hmmmm... ive just built a spitv3,

but theres no bass in it...ive built it to usual spec, all traces are fine, switch is working fine, its just weird, (i have another with exact same parts to compare)

the tone (47kb) when fully anti clockwise is still bright but still working ok but not got that full bass......maybe ive toasted a cap is my guess,

what would you guys swap out...

c8 - 470nf
or c12 - 1uf (np)
or the 2.2n's.....c14/15...

eeny meeny miny mo - try all three and let us know... 

[deadastronaut]

yeah looks like i'll have too...

[WGTP]

The 2.2n's roll of the treble, so I wouldn't think they were the cause.  The other 2 could be, but there are lots of caps that could be affecting the bass.  C2, C6, C17.

Stick a small wire on the end of your output chord and start at the front of the circuit and touch the wire to various places in the signal path and see if you can hear where the bass drops out.  Audio Probe method.  

[gigimarga]

hi gigimara, great, glad you built it and like it...nice one..

here ya go!... v3 is pretty much just the same, but simplified switching..more straight to the point!

http://dl.dropbox.com/u/7464107/SPITFIREV3.jpg


the pdf's are in my gallery (robert henry)

Thank you very much!

[WGTP]

http://www.aronnelson.com/gallery/main.php/v/WGTP/Spitfire+Gain+Mods.jpg.html?g2_imageViewsIndex=1

Higher gain Mods that don't require a change to the layouts.  

[deadastronaut]

cheers wgtp: i'll have a go at that....oh yeah facepalming myself on the 2.2n's..of course!..

i'll track this bugger down...

edit: ive a sneaking suspicion that its some new caps i bought!!....hmmmm,.

edit 2 : swapped c2/c6 /c17 /c9/c15/c17.....still the same...weird!......@#$%ing @#$% @#$% @#$%er

[Ronan]

might i make one suggestion though, when i built mine i had the 3 pots in this way.... vol.. lugs facing down...tone pot lugs facing up...gain pot lugs down.. so they all aligned in a straight row...

Like this? This PCB would be 2.2" x 1.4", with 0.8" between pot centres. I was thinking of using this pot here, they are out of stock on two of them at the moment though. The pots would mount on the back of the PCB.

[WGTP]

http://www.beavisaudio.com/techpages/Switches/

Switching info.   

[J0K3RX]

might i make one suggestion though, when i built mine i had the 3 pots in this way.... vol.. lugs facing down...tone pot lugs facing up...gain pot lugs down.. so they all aligned in a straight row...

Like this? This PCB would be 2.2" x 1.4", with 0.8" between pot centres. I was thinking of using this pot here, they are out of stock on two of them at the moment though. The pots would mount on the back of the PCB.

They have those pots at Mammoth also.
http://www.mammothelectronics.com/category-s/46.htm

[deadastronaut]

@ian, i meant still in a 'V' formation, with the pcb in the middle...like..

o   o
------
  o

top pots lugs facing down..'pcb style lugs'...bottom pot lugs facing up...if practical, and possible...

edit like this..so pcb is designed around an upstanding board...

http://dl.dropbox.com/u/7464107/pcbedge.jpg

edit: saying that , that would require a double sided pcb, so it may just be easier to wire the tone off board anyway....hmmmm..... just thinking aloud!..

[deadastronaut]

edit again!...hmmmm

i just tried a pot attached to vero and an enclosure....it doesn't allow for much room...

8 holes high, including pots total.....not too practical imo....

probably better off using jokerx's or your (ian's) route....shame though would've been neat...

[Ronan]

Yes I see what you mean, there's not a lot of vertical height in a 1590B. It could be done easily though if the resistors were mounted vertically in the PCB itself, like most commercial stompboxes of the past. I layed the resistors flat since there was room enough to do it.

I put in an order for some PCB's last night, so if they work, there will be a few available if any new builders are interested. I have found if there is a PCB (or vero layout) available, I suddenly get a lot more enthusiastic to do a build!

The pots could still be arranged in a V formation but the tone control would have to be attached with wires. It's only just gonna fit sideways in a 1590B, if I'm lucky.

[deadastronaut]

cool, i look forward to seeing those!...

i did try an upright layout last night, but it was just too damn small to be a comfortable build really....

busy today, some bastard tried breaking into my car and @#$%ed my lock......arghhhhhhhhhhhhhh...@#$%ing @#$% @#$%ers @#$%ing @#$%s...........@#$%s

[Maik]

a pcb for the V4
http://img585.imageshack.us/img585/3168/spitfirev4.png

[deadastronaut]

@maik:  no need to reverse the image..sorry i forgot to post the pcb pdf..

unverified:  you have been warned!...

http://dl.dropbox.com/u/7464107/WGTPSPITFIREPCBV4.pdf

http://dl.dropbox.com/u/7464107/WGTPSPITFIREV4.pdf

[Maik]

@Rob  it´s reversed cause I put it on film

[deadastronaut]

gotcha!..

[Maik]

ups, now I´m dead