Looking for simple nice sounding boost

[shawsofhell]

I need to put a boost in a overdrive circuit I'm building for someone (the overdrive is the black cat OD-1). I was thinking a LBP or maybe the jfet boost from T. Escobedo's circuit snippets. Any suggestions?

[RLBJR65]

I just built an R.O.G. FetzerValve the other day easy build, nice clean mild booster / preamp. Might be just what you need to put in front of another OD to push it over the top.

[shawsofhell]

I'm not sure if the OD-1 would respond well to having the boost infront overdriving it. I was thinking more after the overdrive to push the amp and also offer a boost to the clean signal when the overdrive is not engaged?

[cd]

Have you actually built the OD-1 yet?  Believe me, it's loud as all f***.  You won't need to boost the clean tone.

[shawsofhell]

yeah but the guy I'm building it for specifically asked to have the OD-1 and to have a boost that could be switched on seperately.

[petemoore]

I do that on boxes...
 when a certain effect works best with the volume 'up' putting a boost on the other side [where bypass would go] helps things out so when you hit the button on the box the floor doesn't drop out totally [major volume drop], it goes to a presetable  boost  level...
 Putting boost before a seriously already distortin/boostin' circuit can be a bit too much.

[RDV]

There's a bunch of nice boosts out there. Ask your friend whether he wants a transparent boost or something that colors the tone. The various mosfet boosters don't color too much, the jfet and transistor ones do.

RDV

[shawsofhell]

will the mosfet and fetzer break up nicely if the overdrive is really cranking behind them?

[Gilles C]

yeah but the guy I'm building it for specifically asked to have the OD-1 and to have a boost that could be switched on seperately.

Can't you just switch the gain from low to high with a switchable resistor in the feedback loop.

You could even use a 500K pot in place of the 470K and make it a gain pot. You could connect/disconnect the wiper (pin 2) of the pot from one of the end to switch from 470K to whatever value adjusted with the pot.

Added: I checked a few schematics for examples of that, and found this one, but with a variation. Capacitors are also used.

http://www.geocities.com/greene_pedals/pdf/scrmr.pdf