This is my version of Ian's(slacker at DIYstompboxes.com) Echo Base PT2399 digital delay with minor alterations. I use JFET switching instead of 4066 CMOS switching. Some time ago I had problems with this CMOS leading my unit to fail and I don't even know why. Haha. Anyway, pot values are; LEVEL, REPEAT, and DEPTH is 100K-audio(you might want to try linear tapered pots on these); TIME is 50K linear taper; and SPEED is 1M linear( but I used reverse log taper on my build, so you decide!).
I use J113 for the JFET's salvaged from an old broken DOD pedal. You can use either J201 or similar. And also I used an 11 volt zener(1N4741) as protection diode. Bypass switching is illustrated in the pdf file.
The layout is very compact, designed to accomodate miniature electrolytics or boxed film capacitors. Layout's verified? Oh yes!
Layout Download
Posts
Wow! This is clean and compact Layout! Thanks!
ReplyDeleteTon
hi there. i had this version built a day ago. it works as it should. nice and compact. fits a 125b easily. i have a problem though, the signal bleeds with the bypass switch off and and tails switch to on. any clues as to why it does that bro? thanks for any tips in advance. :D
ReplyDeletei will be back. lol. ;)
hi there. after writing the first inquiry (dated 15Nov2010 2:08AM), i sat on the circuit and saw that i missed a diode under one of the switching fet. no more bleeding problem. that's all. thanks for the layout again.
ReplyDelete-maat
Hi ! i like all your layout! i have a request! can you make a layout of sans amp california?
ReplyDeleteI already have it but I won't post it this time unless....
ReplyDeleteDoes anyone have the schematic diagram of this version with JFETs??
ReplyDeletei have build this echo but i dont know ctrl 1 n 2 to connect...now project echo is pending...(rex)
ReplyDeleteWiring diagram of CTRL 1 & 2 is shown at page 2 of the pdf..
ReplyDeleteooo he he..im sorry i dont see..tq very much RAPIDRIOT...(rex)
ReplyDeleteSorry but i think that this is the schematic of "rebote delay" from tonepad. Isn't really the same with echo base delay effect.
ReplyDeleteI hope I can have our drummer make me my own DD clone with this. Ahh, the perks of knowing someone who studied electronics! If only there's a downloadable schematics for that Giga Delay. Hahaha!
ReplyDeletehi, I built the pedal and it works, but i have a lot of noise in the repetitions :(
ReplyDeleteWhat to do?
Do you have removed the CMOS of this layout. Thanks
ReplyDeleteHi, me too I've built this very good delay but I'm having a real big noise from repetitions when I set feedback higher than 1/4. I've used your nice and compact layout, components are fairly good ones (metal film resistors etc etc).Could the noise be generated from the PT2399?
ReplyDeleteThank you!