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.dfglv wrote: Mon Feb 10, 2025 5:37 pmi'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.
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