Page 231 of 231

Re: Small questions that don't fit anywhere

Posted: Mon Feb 10, 2025 7:09 pm
by Nate Dort
dfglv wrote: Mon Feb 10, 2025 5:37 pm
benadrian wrote: Mon Feb 10, 2025 11:55 am But I'm listening. Thoughts?
i've been meaning to get round to something like this for a long time, since i know very little about applied audio electronics or circuit design, and a straightforward preamp/buffer seems like a good place to begin. i landed on don tillman's preamp design (after being really impressed by his notes on guitar pickup characteristics), but i don't quite know where to go next as far as identifying a viable modern substitute for the JFET part, which i don't think is in production anymore.
J201 FETs are still readily available and used all the time in pedals. You could also sub something like MPF102 or 2SK30, just watch the pinouts.

Re: Small questions that don't fit anywhere

Posted: Tue Feb 11, 2025 11:12 am
by dfglv
Nate Dort wrote: Mon Feb 10, 2025 7:09 pm J201 FETs are still readily available and used all the time in pedals. You could also sub something like MPF102 or 2SK30, just watch the pinouts.
ah terrific, thank you! i'd prematurely given up after being unable to find any at the first two part suppliers i checked (farnell, RS, both UK)

Re: Small questions that don't fit anywhere

Posted: Tue Feb 11, 2025 11:26 am
by benadrian
I was under the impression that thru-hole J201 were becoming very hard to find, but surface mount versions are still plentiful.
If there are good sources of the thru-hole package J201, please let me know.

I guess that I could also just check mouser and parts express myself ;)

Re: Small questions that don't fit anywhere

Posted: Tue Feb 11, 2025 11:41 am
by Dr Tony Balls
benadrian wrote: Tue Feb 11, 2025 11:26 am I was under the impression that thru-hole J201 were becoming very hard to find, but surface mount versions are still plentiful.
If there are good sources of the thru-hole package J201, please let me know.

I guess that I could also just check mouser and parts express myself ;)
Try 2N5458

Re: Small questions that don't fit anywhere

Posted: Tue Feb 11, 2025 11:53 am
by twelvepoint
Looks like I have 8 J201s if anyone needs one or two