Good morning everyone,
Due to the shortage of good, quality, non-fake, reasonably priced TO-92 JFETS like J201 and 2n5457, I am considering their (supposedly) SMD equivalents - MMBFJ201 and MMBF5457, respectively.
I know I will need a conversion board in order to use them in a THT environment, like most pedal builds, and this is not a problem for me.
My questions are:
1. Are they truly FULL equivalents? Can SMD versions be used instead of TO-92 versions? Will they work the same? Any mods needed to the rest of the shematic to accomodate for the change in case style?
2. I've heard the tolerances in SMD parts are tigher. Does this mean I will need fewer, say, MMBF5457's to find a VgsOFF-matched quartet for a Phase 90 (Nom Nom) than I would need 2n5457's?
3. I've heard that Source and Drain are interchangeable on both 201 and 5457. Does this really mean I only need to make sure the Gate (left pin in TO-92, top one in SMD) is connected correctly, and the rest can go wherever?
4. Anyone had ay luck using SMD 201's and 5457's from Tayda? Any problems with those?
Thanks in advance!