View Single Post
Old 12th Jan 2017, 1:06 pm   #23
WaveyDipole
Nonode
 
WaveyDipole's Avatar
 
Join Date: Mar 2013
Location: Leicester, UK
Posts: 2,505
Default Re: 2N3819 Mosfet

Quote:
Originally Posted by crackle View Post
So is that a fact the 2N3819 JFET can be used either way round, with equal efficiency, the only pin which needs to be specific is the gate.
Wow that does seem strange.

The fact that many JFETs will work with source/drain either way was mentioned by G6Tanuki and kalee20 and seems to have been confirmed by a few others since. They are symmetrical devices, although it might not be quite correct to say it would work with all JFET devices or 'with equal efficiency' although the difference should not be noticable in practice. It will definitely not work for IGFETs or MOSFETs.

I see Phil G4SPZ has now confirmed that he followed the Farnell layout and this worked fine so hopefully it will work for your project as well.
WaveyDipole is offline