Also: Noticed on the Schematic you linked that Q1 was a 2N5210, and Q2-3 were listed as the 2N5172. I could swap the 5172s for BC337-25s if the pinout is correct (CBE).
Given that the circuit topology is pretty tried-and-true, and so not finnicky about transistor specs, I wouldn't get hung up on the specific kind of transistor. Just try a bunch of low gain CBE-pinout transistors and see what you like. The folks on pedalpcb board were getting good results with 2n2221s and 2n3903s.
I ended up trying some BC550Bs in it, and I really like the character and sound. Going to build another and use sockets to try some different low gainers in Q2/3 and see how it compares.
Transistor notes are updated. Since 2N5172 has BCE pinout there is some suggested replacement in the notes. You will need low gain NPN Silicon for Q2 and Q3.
Just wanted to check before I build this: 2N5172 pinout is B-C-E, so is the layout correct, or will I have to twist the legs to match?
ReplyDeleteAlso: Noticed on the Schematic you linked that Q1 was a 2N5210, and Q2-3 were listed as the 2N5172. I could swap the 5172s for BC337-25s if the pinout is correct (CBE).
ReplyDeleteGiven that the circuit topology is pretty tried-and-true, and so not finnicky about transistor specs, I wouldn't get hung up on the specific kind of transistor. Just try a bunch of low gain CBE-pinout transistors and see what you like. The folks on pedalpcb board were getting good results with 2n2221s and 2n3903s.
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DeleteI ended up trying some BC550Bs in it, and I really like the character and sound. Going to build another and use sockets to try some different low gainers in Q2/3 and see how it compares.
DeleteThanks for verifying. I'll change the transistor labels as soon as I can...
DeleteThis comment has been removed by the author.
ReplyDeleteTransistor notes are updated. Since 2N5172 has BCE pinout there is some suggested replacement in the notes. You will need low gain NPN Silicon for Q2 and Q3.
ReplyDelete