Built a BSIAB II

[sfx1999]

I must say, this thing is great. What I discovered, though, was that this thing makes and awesome overdrive pedal. I run it through a tube amp I built (P1 with a Champ preamp) and an 8 inch speaker. I can actually get some SRV tones out of it.

The distortion is good, too.

I have it biased to around 3.8 V, BTW. I could probably get it to sound better by tweaking it, but it's hard to play and use a screwdriver at the same time.

[jonathan perez]

run it at higher voltage




just kidding...sorta...

[sfx1999]

I would, but EVH stole my variac.

[spiderman2812]

Nice pedal. I recently built one i also put a switc dpdt to switch c8 cap values from .1 to 1 uf and i put a smoothing cap across the volume pot. I'm definetly loving the lower drive settings! How's that p-1 working for you i was thinking about building one myself and by the way what type of speaker did you use in it?

[sfx1999]

It's a nice amp, but it definitely isn't a P1 anymore. I used the Champ's preamp section. I used a Jensen P8R reissue. The wierd thing is, it sounds better now than when I first built it. I think it may have to do with the speaker 'breaking in' as they say.

Unfortunately, I don't have a microphone to record it with.

[Jaicen_solo]

What output tube are you using??
I really don't like those EL84's they use, they're just too glassy for my taste, especially when they're being driven as hard as they are in a P1. Have you tried subbing in a 6V6 to get it closer to the champ sound?? It won't be exactly the same, because it's running on a lower voltage, but it's easy to do (just add an extra resistor and a socket), as long as you only run one tube at a time
I'd have thought the Champ circuit would be a bit wild running into the P1 output??

[MartyMart]

I've just given mine to the new guitarist in the band and he LOVES it !!
He will however pay me the cost of all the parts at least
Being firstly a keyboard player/bass player, I've relieved myself of "live" guitar
duties :-(  .... I just wasn't quite cutting it, but that's fine.
I'll stick to writing/recording with guitar.
We've just found a second guitar player from Portugal who is a genius !!
Nailed all the parts with great tone and timing to die for
He's a REAL find  !

MM.

[sfx1999]

What output tube are you using??
I really don't like those EL84's they use, they're just too glassy for my taste, especially when they're being driven as hard as they are in a P1. Have you tried subbing in a 6V6 to get it closer to the champ sound?? It won't be exactly the same, because it's running on a lower voltage, but it's easy to do (just add an extra resistor and a socket), as long as you only run one tube at a time
I'd have thought the Champ circuit would be a bit wild running into the P1 output??

I am using an EL84. Putting a 6V6 in there would be impossible; my chassis does not have enough room. Not to mention I would have to drill a new hole for the socket and other stuff.

I did have a problem with oscillation at first, but I fixed it with some shielded wire. I think I might use coaxial cable next time, but I am not sure.