As requested. I happen to have an original unit in metal enclosure, and to my ears this is definitely one of the greatest Ibanez overdrives. This layout is with your standard transistor pinout and with input buffer omitted. Reason for omitting the buffer is quite obvious... It is big, but should fit in B-box without an issue. Clipping diodes are placed so that one can easily add a switch for them. I would personally probably go with two red LEDs and two (or four) 1N60Ps.
Edit: There were a few errors on the layout (transistor labeling, vref via 1M to wrong input, HF tamer cap location and a vref via 100k to discrete opamp). All of those are now fixed and the current layout is verified. A/B'd this circuit with my original unit, and the differences between the two are minimal. Still one of the greatest Ibanez overdrives!
It would be interesting to see some layout of guitar amp that fit in a stombox, if you have somethings i'll appreciate
ReplyDeleteThey have you covered...
ReplyDeletehttp://tagboardeffects.blogspot.com/search/label/Amp
i was talking about something more powerful like an electro harmonix 44 magnum
DeleteNow that this conversation has nothing to do with CR5, i think i can chip in...
DeleteNo you weren't :)
44 is not doable:
http://www.freestompboxes.org/viewtopic.php?f=2&t=11733
It'll be extremely hard to get that kind of power out of anything that runs on 9-18V. I'd suggest checking out kits like Musikding for Madamp G3 blues.
http://www.musikding.de/Kit-Madamp-G3-Blues
I've built the older G2 little more than year ago and that'll suffice as a practice amp.
+m
Built it, tracked the errors and fixed the layout.. Sounds awesome.
ReplyDelete+m
I'm gonna have to build one of these. I picked up a CR5 on a whim because it was cheap and came with Metal Zone I intend to mod into something silly.
ReplyDeleteThe switching is a bit dodgy, and the enclosure is... well.. A Soundtank: The Doofiest Pedal Ever. But still; fuck me this thing sounds far, far better than I would ever have guessed it did.