Here's a collection of vero and tagboard guitar and bass effect layouts that we have put together covering all of the classic and popular effects in ever growing numbers. Many of these have been posted on two excellent forums, freestompboxes.org and circuitworkshop.com. Check those out for other great designs, layouts and discussions on building your own effect pedals. Enjoy the builds and please visit us at www.facebook.com/tagboardeffects!
Right, this is working in a very strange way. Without the JFET it works but it's fairly quiet, with a 2n5457 with the legs twisted it doesn't work but that what the pinout says, I've checked the scheme and your layout definitely uses the correct pinout. Here's where it gets strange, I'd I put the 2n5457 in with the legs as normal, dsg, then it works but sounds like it's poorly biased, if I take the gate leg out then it works great and it's got a decent volume! WTF is going on? I'm guessing that I've just screwed something up but I'm off out to a gig so I've not got time to investigate, any ideas?
I think it's just a biasing problem. Can you try breadboarding the 3K resistor going to Q2 drain? I believe a custom, suitable value there should gine you an answer.. +m
Sorry for the late reply dude, I was feeling a little partied out after last night :D I think you might be right as I used a 3k3 in place of the 3k, though it still doesn't explain why it's not working when I twist the legs of the jfet to match the layout's pinout (which is definitely correct) but when I leave the legs untwisted it works?!! I don't know, I've gone over the layout a couple of times but my hungover eyes may be playing tricks on me. Anyway I've just got an SM57 which is itching to be played with!
Right, this is working in a very strange way. Without the JFET it works but it's fairly quiet, with a 2n5457 with the legs twisted it doesn't work but that what the pinout says, I've checked the scheme and your layout definitely uses the correct pinout. Here's where it gets strange, I'd I put the 2n5457 in with the legs as normal, dsg, then it works but sounds like it's poorly biased, if I take the gate leg out then it works great and it's got a decent volume! WTF is going on? I'm guessing that I've just screwed something up but I'm off out to a gig so I've not got time to investigate, any ideas?
ReplyDeleteI think it's just a biasing problem. Can you try breadboarding the 3K resistor going to Q2 drain? I believe a custom, suitable value there should gine you an answer..
Delete+m
Sorry for the late reply dude, I was feeling a little partied out after last night :D I think you might be right as I used a 3k3 in place of the 3k, though it still doesn't explain why it's not working when I twist the legs of the jfet to match the layout's pinout (which is definitely correct) but when I leave the legs untwisted it works?!! I don't know, I've gone over the layout a couple of times but my hungover eyes may be playing tricks on me. Anyway I've just got an SM57 which is itching to be played with!
Delete