Since there's a lot of off board wiring going on with this one, here's a full off board wiring diagram to help clarify.
Wednesday, April 20, 2016
Grab & GoGo Delay/Overdrive
Here's a cool little dual effect designed by Allesz over on FSB. I actually laid this out a long time ago, but couldn't wrap my head around the switching with the buffer. I've learned a lot since then and feel confident in my understanding to publish this one here. It essentially is a basic PT2399 delay with 2 of the pins from the PT2399 being used as a separate soft clipping overdrive. A simple buffer, built around the MPSA13, is always on, making this a non-true bypass effect. But a little buffering never hurt anyone ;) The original schematic and discussion can be found here.
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This board wiring diagraam looks awesome)
ReplyDeleteThanks!
DeleteI wonder how does it sound...
ReplyDeleteThere's a sound clip in the FSB thread.
DeleteHi! I just want to say thank you for your work and for this nice webpage
ReplyDeleteThanks! I appreciate it!
DeleteHelp, I have built as such to the diagram and not envuentro the fault does not give me a signal, only hum without activating: that could be the detail.
ReplyDeleteIs this actually working ?
ReplyDeleteIf you built this with a different time pot, say 100k or 500k, would it change anything? I just don't have any 50's. Thanks
ReplyDeleteThrow a 100k resistor across lugs 1 and 3 of your 100k pot and you've got a 50k pot. 100k or 500k is going to sound pretty bad.
Deletesorry, but where +do i put the input jack?
ReplyDeletecan i use ceramic caps with this build or any other builds in this site/blog? greetings from philippines..love this site/blog..really learned a lot from you..thanks for your efforts..really makes the perfboard world lively..and i relly enjoy building with perfboards..really makes the brain work 😁.thankyou so much.
ReplyDeleteAbsolutely.
DeleteCan't get it to work. At first I used a 78L05 has a reversed pinout, so I flipped it around and now it's correctly outputting 5V, whereas I was getting about 7.5V on its output before.
ReplyDeleteI thought it may have damaged the PT2399 so I tried a new one and still nothing. Bypass works along with the volume control, but nothing when engaged. I'll keep troubleshooting and update if I find the issue.
Well, I found one error so far - According to the schematic, Time 2/3 and the 100nF off of pin 7 should go to ground. That didn't fix it though...
DeleteDid you ever get it going? I found the ground off pin 7 and time 2/3 as well, but I can't get delay. I can get sweet sweet overdrive though.
Delete👌💯🙏🙏🙏🙏🙏💐💐💐💐💐
ReplyDelete