- Feb 16, 2008
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- John K Custom Basses
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overdrive/fuzz quest
- Thread starter johnk_10
- Start date
was looking at the picture on my phone and could not see what you had written under the word submarine.
I am wondering did you use BF245 transistors as in the Kreuzer schematic or 2N5457 as in the version that Os build? If you tried them both did you notice much difference?
Thanks
- Feb 16, 2008
- 21,240
- 23,633
- Disclosures
- John K Custom Basses
- Feb 16, 2008
- 21,240
- 23,633
- Disclosures
- John K Custom Basses
since I was able to shrink the size of my vero layout a little for the bluetube 903 circuit, I thought that i'd try to mount one in a more 'conventional' Hammond 1590BB enclosure. with top mounted in & out, and the DC jacks it looks like it'll fit in there pretty easily now. I used the same method to mount the tube socket as in the first one, so there will be no holes drilled in the top of the pedal for the tube mount. the footswitch had to be mounted off-center to allow easy access for tube swapping.
father of fires
Commercial User
Hey John...I'm starting to play some faster songs and I'm looking for more precision in my dirt tone. Some times it can all turn to mush. Have you noticed if any of these pedals react better to faster playing?
- Feb 16, 2008
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- 23,633
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- John K Custom Basses
IMO,a lot of them do. the holy fire, the ecstasy, the blackstone Appliances mosfet overdrive, the Timmy, the Fairfield Barbershop and all of the Barber pedals track very well.
- Feb 16, 2008
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- John K Custom Basses
got it tested and mounted in it's enclosure. i'm running an early 60's Tung-sol 12AU7 in this one:
the status light is red to show that it's powered up (and in true bypass), and turns blue when it's on.
the status light is red to show that it's powered up (and in true bypass), and turns blue when it's on.
father of fires
Commercial User
Looks awesome. What do you think about replacing the opamp section with something like an SS2, Flipster, Triple Wreck, etc?
- Feb 16, 2008
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- 23,633
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- John K Custom Basses
I thought about that, but there's no real need to. the TL072 is a JFET op amp and I think that it sounds nice in this preamp. i'll probably mess around the with tone stack and filtering in this one though. IMO, they can be a little too bright on the top end.
father of fires
Commercial User
I always found mine too dark and mushy because of the extreme clipping of the opamps.
- Feb 16, 2008
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- 23,633
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- John K Custom Basses
IMO, it's the tube that does that. if you use a 12AU7 they're ALOT better (and ALOT less mushy).
- Feb 16, 2008
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- 23,633
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- John K Custom Basses
at this point, there's just too many of them that I really like.
and if one of them wasn't, I modded it until I liked it.
father of fires
Commercial User
I imagine they're all a little different but in the blue tube I had if you took the tube out and used a piece of wire it sounded almost exactly the same. The opamp is set up x300+ gain on it's own. There is plenty of clipping.
Don't get me wrong. I love this design. I just think it could use some updating.
- Feb 16, 2008
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- John K Custom Basses
well, swapping the tubes in all three of mine makes a big difference in their gain & tone, so IMO, the tube IS doing something in there.
I thinking of trying this but throwing a weber transformer in there to step the voltage up for the tube. Ever tried a setup like that John?
Awesome seeing you going back to the Blue Tube. I've been looking for more or less the preamp of the Terror Bass (maybe the same or sim to the AD200) in a pedal. All I know about it is it's got a tube and has the Fender tone stack. Well, so does the this pedal. 
Most likely over simplifying, here, though as this is all over my head atm.
Any idea how much (if any) amount of swapping components could get it to Orangeville? Or am I barking up the wrong tree here?
Most likely over simplifying, here, though as this is all over my head atm.Any idea how much (if any) amount of swapping components could get it to Orangeville? Or am I barking up the wrong tree here?
- Feb 16, 2008
- 21,240
- 23,633
- Disclosures
- John K Custom Basses
you could get a lot more voltage without adding a separate transformer, but to me, when the pedal sounds as good as it does now, even though it's a starved plate design, I wouldn't change a thing. with a 12AU7 these are very touch responsive and at low gain settings, can be almost transparent' sounding (as in, adds just a little 'color' of it's own)
