TL074 vs LF347

[Plexi]

Both are Quad JFET Op-amps.
Same pinout.

Wich is the main difference? Voltages?

LF347:
http://www.ti.com/lit/ds/symlink/lf347-n.pdf
TL074:
http://www.ti.com/lit/ds/symlink/tl074.pdf

I'm into a Barber Dirty Bomb, and found in my drawer one new (at least the pins are clean) LF347.

[GibsonGM]

They look VERY similar in the important places from the 2 data sheets I'm reading.  For what we do here, I would wager they are interchangeable.

[PRR]

Both are lower-cost "replacements" for the first-generation hybrid and monolithic FET input opamps such as LM411.

The '347 has the '411 type output stage with good size BJTs and explicit current limiting. The TL0 series instead protects the outputs with >100r of dumb resistance, and probably smaller BJTs. Either is ample for nearly any opamp-size chore. There may be some specific load the 411/347 types pull better than the TL0.

It is possible they are no longer different products; the TL0 could have been silently upgraded to the '411 type output. Otherwise they are largely the same. Any specific implementation detail that worked better on one may have been copied-over to the other over the 30+ years these things have been running.

[Plexi]

Thanks GibsonGM and PRR

I'll go ahead with the Barber, and maybe MXR Distortion II... and see how it goes if changing them.