DIY onboard LPB-1?

[ibnzneksrul]

Anyone ever try this? Schematic looks simple. I've got room in the control cavity for a small circuit breadboard, an unused battery compartment, and an unused pot position where I could mount a toggle switch (or a push-pull pot). Thinking I'd wire it with true bypass and switch it in to boost the output of the bridge pickup, which is significantly lower than the neck pup.

 

[beta_442]

I've thought about the same thing. I don't see it being very complicated to do. Right now I'm just finishing a DOD 250 overdrive clone with bass mods. Let us know if you do this and how it works out. I have seen cheap dept. store brand guitars in the past with distortion circuits built in.
I'd imagine you would need some good amount of shielding in the cavity to keep the pups quiet.

 

[ibnzneksrul]

Well.......for testing purposes I just borrowed an actual (brand new) EHX LBP-1 from my guitarist brother, and discovered that it's not all that linear across the frequency spectrum. Lows are not amplified as much as highs, so adjusting the boost level (even to approximate unity gain) for a bass guitar results in an over abundance of highs compared to the input. Also, even a hot passive bass pickup will drive the transistor into saturation/clipping on the lower notes of the E string.

So... this circuit will not do the trick for me. I'll have to keep looking for something that will.

 

[selfblessed]

So the LPB-1 starts to remove lows???