Roland AP-7 Jet Phaser - let's get it working! (Aion FX Octatron)

The 2SK30A-GR seem to have the pinout Source, Drain, Gate, versus the J201, 2n5457 pinout which is Drain, Source, Gate.

Are the source and drain interchangeable here or will I need to use a differnet so-23 to to-92 adaptor for this?
 
neiltheseal said:
The 2SK30A-GR seem to have the pinout Source, Drain, Gate, versus the J201, 2n5457 pinout which is Drain, Source, Gate.

Are the source and drain interchangeable here or will I need to use a differnet so-23 to to-92 adaptor for this?
Click to expand...
All JFETs exhibit interchangeable source & gate pins. It the nature of their design.
 
Cybercow said:
All JFETs exhibit interchangeable source & gate pins. It the nature of their design.
Click to expand...

Correct - in this case Toshiba just arbitrarily labeled them differently than the standard, but in construction they're identical to the J201, 2N5457, etc.

...At this point someone will usually chime in and point out that this is only true most of the time, that there are technically some JFETs where the source & drain are not interchangeable. I've never encountered one in our corner of the electronics ecosystem. It probably goes back to the early days of JFETs, a conventional wisdom that was passed down from the elders because it was true at one time, but it's no longer relevant to what we do.

In any case, I've tested the Toshibas and verified that source & drain are interchangeable even though the datasheet doesn't say it.
 
I spent a lot more time than I'd like to admit troubleshooting a SMD footprint where my component tester was showing the source & drain as being swapped..
 
For those of you who are interested here is the tayda template for this project. Per my norm I used 3mm leds with no bezel and the smaller lumberg style power jack so adjust to taste. This is based on the most recent template so this should be correct but of course its not verified yet.

Tayda Electronics Drill

Tayda Electronics Drill Designer for custom enclosures.
drill.taydakits.com drill.taydakits.com
 
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