Here's a collection of vero (stripboard) and tagboard guitar and bass effect layouts that we have put together covering many classic and popular effects in growing numbers. Many of these have been posted on freestompboxes.org, so check that site out for great discussions on building your own effect pedals. Enjoy the builds and please also visit us on Facebook and Twitter
Probably a bit late to comment, but I think the collector on Q4 should go to +9v, rather than ground.
I didn't have the correct transistors, so used 2n2222s. With a 2n2907a as Q1 it sounded horrible - substituting a 2222 made a huge difference, so maybe ignore the layout and for an NPN here (there's some discussion along these lines at Freestompboxes - search for the thread on "Simple Transistor Compressor").
Don't know what you mean by late, but your input is very welcome! True, Q4 collector was connected wrong. I updated that accordingly. I also tweaked the bias for the PNP to achieve higher input impedance as Mictester notes on FSB thread. http://freestompboxes.org/viewtopic.php?f=28&t=8245
How did you fix the +9V to Q3 collector? My fix on the layout is rather crude, but it is the only difference against the original, faulty one. +m
Well, a full 11 months after the previous post on the thread might be a bit tardy!
I just pulled the collector from the board and soldered a flying wire between the it and an empty hole on the bottom row, though looking a bit harder at the layout, I now see I could have done a bit of gardening with the jumpers between rows 1, 2 and 3, left Q4 in place and put my flying wire under the stripboard.
Still, I now have a nice-sounding (if a bit rats-nest-looking) compressor: many thanks for your layout.
Put this together, used a BC559B for the PNP and BC547C for the NPN which have similar specs to the 213 and 183 and I have a unit that is sooooo noisy it's unusable. For the life of me, cannot find the problem.
No controls? Low threshold, low ratio I suspect?
ReplyDeleteThis comment has been removed by the author.
DeleteThis comment has been removed by the author.
Deleteanyone built this thing yet?
ReplyDeleteProbably a bit late to comment, but I think the collector on Q4 should go to +9v, rather than ground.
ReplyDeleteI didn't have the correct transistors, so used 2n2222s. With a 2n2907a as Q1 it sounded horrible - substituting a 2222 made a huge difference, so maybe ignore the layout and for an NPN here (there's some discussion along these lines at Freestompboxes - search for the thread on "Simple Transistor Compressor").
Don't know what you mean by late, but your input is very welcome! True, Q4 collector was connected wrong. I updated that accordingly. I also tweaked the bias for the PNP to achieve higher input impedance as Mictester notes on FSB thread.
Deletehttp://freestompboxes.org/viewtopic.php?f=28&t=8245
How did you fix the +9V to Q3 collector? My fix on the layout is rather crude, but it is the only difference against the original, faulty one.
+m
Well, a full 11 months after the previous post on the thread might be a bit tardy!
DeleteI just pulled the collector from the board and soldered a flying wire between the it and an empty hole on the bottom row, though looking a bit harder at the layout, I now see I could have done a bit of gardening with the jumpers between rows 1, 2 and 3, left Q4 in place and put my flying wire under the stripboard.
Still, I now have a nice-sounding (if a bit rats-nest-looking) compressor: many thanks for your layout.
Hi there
ReplyDeleteIs there any chance to get some audio or video clips for that build? I can't just build it to see if I like it unfortunately :\
Hi there
ReplyDeleteIs there any chance to get some audio or video clips for that build? I can't just build it to see if I like it unfortunately :\
IS it possible to add a compress control to this?
ReplyDeletePut this together, used a BC559B for the PNP and BC547C for the NPN which have similar specs to the 213 and 183 and I have a unit that is sooooo noisy it's unusable. For the life of me, cannot find the problem.
ReplyDelete