Hi Andrew, well the same misprint is in the original B1 article on passdiy I'm surprised that no one has picked it up before now!! If I google jfet symbols, some turn up with Drain above and source below, and some turn up the other way around... I guess in my prototype I have them reversed!!
Attached is the second thing that comes up in google. Note the second last image. I guess it is a good thing that they tend to be symmetrical
The reason for my question is to find alternative for the Jfet. (some of them is out of stock and there are different pin orders.)
I assume that if we will stick the original Toshiba and as long as we will keep the middle pin – as the Gate.:
1.It can be placed according to the silk print. ( round side towards the chamfered corners ).
2.The Drain and source are symmetrical ( as you mentioned ).
3.If so ,the direction to the chamfered corners of silk print is not that important and can be any side.
4. For the Philips and On semiconductor I will need to bend the pin in order to get them to place.
Hi Ori, Andrew is correct WRT which is source and which is drain going off the schematic (rather than the text) of the B1 article. Most of the symbols show upper as drain and lower as source for the jfet. If you are planning on using another jfet other than the toshiba's I would definitely do them the right way as not all are symetrical.
I went back to the text before I posted to make sure I wasn't mixing things up, which turned out to confuse the issue I had some confusion originally over which pin was which (now I know why) but found people saying it didn't really matter (which when I tried it either way, it didn't seem to).