generally whenever I run across something I don't feel like buying I search the part number on here to see what other people did. so just now I searched 2sk208 and saw multiple posts about subbing in j201 ... I did that for one of the oddball op amps as well in the low tide
I feel like I should mention that just because the option is there, you don't have to add a bias knob etc to something like the pedalpcb version of the silicon sunface ... for instance, I took the carbon black and built a NPN tonebender mkii by just omitting the tone control. now you will have...
when in doubt, break out the continuity tester and correlate the pads on the pcb with the pads on the jfet breakout boards. and if you're contemplating replying that you don't have a continuity tester or don't know how to use one then you should probably fix that rather than waste your time and...
the lm108 and lm208 are probably easier to find domestically these days, mostly in metal can package ... bonus points if you find a way to use a military flat pack version
since last I wrote about this my sources are either under bombardment or ban ... so ... 2N5088 is fine ... can also try 2N4401 ... the clipping diodes (KD521A) measured much closer to 1N4001 than 1N4148 at 1mA
does it matter? I mean getting in a twist about the big box 25O just shows how little attention gets paid ... there's been gut shots of it on the fx database for well over a decade along with discussion at the usual places