Author Topic: X FUZZ  (Read 131616 times)

deadastronaut

Re: X FUZZ
« Reply #60 on: April 14, 2014, 03:43:00 AM »

I think,the pot is forming a filter with your C2 which is why it is rolling off some high end.


yeah that makes sense now i look at it... (i'll take a look at that BMP with contour too, cheers bryan. 8)

@prr: oops yes...i shall remedy.  8)
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deadastronaut

Re: X FUZZ
« Reply #61 on: April 14, 2014, 06:39:10 AM »
ok, i give in  ;), i put the 1M gain pot across the collector and base of Q1...which works , and now it doesn't change the tone etc...great

however there is DC on it as its scratchy as hell...

@gus: added v for ya!.. ;)


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Brymus

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Re: X FUZZ
« Reply #62 on: April 14, 2014, 12:36:26 PM »
Now you need R1 again ,since you moved the pre gain pot.
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deadastronaut

Re: X FUZZ
« Reply #63 on: April 14, 2014, 01:46:03 PM »
oops oh yes... 8)

i tried a recovery stage on it today too, much better, (lifted from the big muff ( at least that came in useful lol. ;D.)

sounds cool still... 8)
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samhay

Re: X FUZZ
« Reply #64 on: April 14, 2014, 03:56:02 PM »
As promised, I have this on the breadboard.

I think the LEDs should be oriented with cathode towards base. Once I figured this out, it wasn't noticeably gated and worked ok with the volume rolled back.

It is savage at max gain, but mostly in a good way. I added a base resistor to Q1 to tame it a little and make it play nice with others. It was squealing pretty badly on the breadboard without a buffer in front, so a small cap to ground here might help too.
I tried the 'Blues Breaker' style gain control with lug 3 of the gain pot connected to C4. At max gain, this is equivalent to how its drawn at the moment, but it lets you back the gain off a little easier.
You certainly need to roll of some fizz, and the SWTC does this nicely.
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PRR

Re: X FUZZ
« Reply #65 on: April 15, 2014, 02:03:00 AM »
> there is DC on it as its scratchy as hell

On what? The Gain pot?

The way you have it on #61, the "gain" really does violence to the DC conditions. (Meter the collector while you diddle "gain".) I suspect the C-B resistor should be fixed, and an input level pot put before the input capacitor (you may have done this before?). There's other ways but more complex.
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deadastronaut

Re: X FUZZ
« Reply #66 on: April 15, 2014, 09:38:05 AM »
@sam: ahh cool, you have it on bread too...

yep cathodes/anodes ...i'll sort that, :icon_redface:

the SWTC tames it a lot for the better for sure, non squeely... 8)

is your gain pot scratchy?.... i'll meter mine in a bit.

''violence to the DC conditions''  :)  i'll check for violence too.. ;D

edit:

@paul: whilst diddling the gain pot i get...0.63-2.54v..

edit:
sam, i put my gain pot the same as yours now, but still scratchy... :)
« Last Edit: April 15, 2014, 10:17:50 AM by deadastronaut »
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DDD

Re: X FUZZ
« Reply #67 on: April 15, 2014, 10:40:36 AM »
Is the gain pot actually necessary here?
Guitar volume pot does srtrictly the same without any scratchy sounds and without extra components IMHO.
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deadastronaut

Re: X FUZZ
« Reply #68 on: April 15, 2014, 10:46:14 AM »
@DDD:  its a nice option to have it just for slight breakup in an amp really....
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Will.mendil

Re: X FUZZ
« Reply #69 on: April 15, 2014, 11:00:07 AM »
Since I started on solid stat amps I need really use the volume pot on my guitar which might be a shame but really preference the pedal to self contained. I only use the volume on the guitar to kill the humms and feedback a when I am not playing.
Don't know what to do with a paritculare transistor? Check this website where stompbox pedals are listed by what transistors they use

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deadastronaut

Re: X FUZZ
« Reply #70 on: April 15, 2014, 12:39:48 PM »
one other issue i found is the volume on guitar when lowered also rolls of the hi tone too (  on single coil neck pup)

the bridge hum pup fairs much better...
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Will.mendil

Re: X FUZZ
« Reply #71 on: April 15, 2014, 02:27:48 PM »
I d like to go back to the x fuzz. I ve bread boarded it making sure it was exactly what you did and I don't get at all the sound you have on your YouTube video. What set up did you use? Do you have any further information ? Has anyone tested it ?
Don't know what to do with a paritculare transistor? Check this website where stompbox pedals are listed by what transistors they use

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Will.mendil

Re: X FUZZ
« Reply #72 on: April 15, 2014, 02:28:06 PM »
I like the rock but I love your fuzz
Don't know what to do with a paritculare transistor? Check this website where stompbox pedals are listed by what transistors they use

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deadastronaut

Re: X FUZZ
« Reply #73 on: April 15, 2014, 02:51:07 PM »
the schemo on page 1 is what i used for the vid,,

i used yellow 5mm leds if that makes a difference.

try taking the 220k to base ...
« Last Edit: April 15, 2014, 02:53:27 PM by deadastronaut »
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Will.mendil

Re: X FUZZ
« Reply #74 on: April 15, 2014, 03:13:54 PM »
obviously it had to be the only colour I cannot find :(.
What do you mean taking the 20K to base?
Don't know what to do with a paritculare transistor? Check this website where stompbox pedals are listed by what transistors they use

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Will.mendil

Re: X FUZZ
« Reply #75 on: April 15, 2014, 03:15:55 PM »
I can only find 3mm yellow, they are 1.841V, what are yours?
Don't know what to do with a paritculare transistor? Check this website where stompbox pedals are listed by what transistors they use

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deadastronaut

Re: X FUZZ
« Reply #76 on: April 15, 2014, 03:18:04 PM »
try taking R5 220k to base of Q2 . instead of collector..(page 1 schemo)

not sure of 5mm yellow voltages...2.4v maybe..
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Will.mendil

Re: X FUZZ
« Reply #77 on: April 15, 2014, 03:33:09 PM »
That's what I understood, but R5 is already on base, and collector, putting both legs of R5 to base do you mean?
I know that the yellow's voltage are between the green and red, and i tried both but it only does the x rock sound.
Has anyone else managed to get the same sound? I'm pretty clueless there :s
Don't know what to do with a paritculare transistor? Check this website where stompbox pedals are listed by what transistors they use

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deadastronaut

Re: X FUZZ
« Reply #78 on: April 15, 2014, 03:36:21 PM »
i mean take the 220k to base, and not to collector..

ok, give me a minute and i'll adjust my breadboard to the x fuzz and test again ok...



back in a bit..
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Will.mendil

Re: X FUZZ
« Reply #79 on: April 15, 2014, 03:52:32 PM »


is that what you mean???? i am confuse.

thanks though
Don't know what to do with a paritculare transistor? Check this website where stompbox pedals are listed by what transistors they use

http://scfxguide.wordpress.com/