Boosting MXR Envelope Filter?

[crawler486]

I just built the MXR EF.  Im pleased with the effect but
the problem is the severe volume drop.

How can I remedy this?

[Paul Perry (Frostwave)]

the problem is the severe volume drop.
How can I remedy this?

The "build reports" at Tonepad cover this, either add a linebooster circuit or change some resistors, are the suggestions there.

[crawler486]

They said add an LPB booster...
but the problem is the 2n5088 transistor that is not available here.

do u know any boosters that uses OP Amp instead?

[vdm]

a 2n5088 is not exactly needed. what the circuit needs is a high gain npn transistor - anything like a bc549c, pn100, or something like this...

im not sure where you're located but in australia i cant seem to find them either, but the above are what i use - just be careful of the pinout as they do vary...

good luck,

trent

[crawler486]

I can get pn100.  Are u sure it'll work just like the stock?