hey guys i am looking for an octave up fuzz
nothing really fancy.. can't get transformers either :( shrug
ok i'd love to keep it simple and build it with the stuff ive got around. ive got 2n3904 or 2n5088, some sil diods like 1n4001 and 1n914 some ICs like LM386, LM833 and TL071. and a lot of caps and resistors
i thought of push me pull you but i remember i attempted it on my breaboard once and it didnt work... the only thing i changed was J201. i put a 2n5457...
any help?? ideas and suggestions
RG's Mu-Doubler is about as simple as it gets.
Make sure you read this first to avoid the heartache I had (the link also contains further links to schematic and layout - but read the thread before you build it!!!!):
http://www.diystompboxes.com/smfforum/index.php?topic=87565.0 (http://www.diystompboxes.com/smfforum/index.php?topic=87565.0)
There is the OUSB look in "schematics" link at the top of the page.
hmmm...just found the ousb!..(octave up sick box)..has anyone actually built it off that handrawn schemo?.....if so i'll vero it!.... looks simple enough..
does it sound any good?....rob.
what about the rambler..
http://www.aronnelson.com/gallery/main.php/v/jpm83s-Gallery/album176/Vero+layouts/ramblerlayout8gx.gif.html?g2_imageViewsIndex=1
http://www.youtube.com/watch?v=QjV3X4V7Drc
You need to adjust the gain control just right for the best results.
Something wrong with my hand-drawn schematic?
eehh didnt find much stuff
what dya think on escopedo's OCTUP? can i use a 2 2n3904 for a darlington???
sorry for the double post.
rambler sounds really cool and is really simple enough, can i use 1n4001 or something.. or do i need shottkeys?? how hard will they be to get?
Quote from: Gus on February 28, 2011, 06:25:51 AM
Something wrong with my hand-drawn schematic?
nope!...just got ocd..i like things tidy... :icon_wink:
edit:
the mu doubler does look nice..blendable too..
i think this is the same as a green ringer isnt it?
http://www.aronnelson.com/gallery/main.php/v/rousejeremy/veros/Octave+with+Emitter+Follower.png.html
yeah same here i really like straight forward schematics over the hand drawn
also by push me pull you i meant PUNCH IN THE FACE
i checked push me pull you and it looks pretty promising.. giving the reviews say trannies aren't picky here
has anybody built it?
Quote from: vendettav on February 28, 2011, 06:40:38 AM
has anybody built it?
Search the forum for
pushme pullyou - you'll get more relevant threads by leaving out the spaces between those words.
Hi
the octup is simple and good.
Like all simple rectifier circuits it benefits from a booster in front to avoid gating small signals. Schottky or Ge diodes help a bit, too.
cheers
i built the 'simple octave up' . its a nice one too. radio shack carries small transformers that some of these simple octavers use to rectify...
Quote from: vendettav on February 28, 2011, 06:40:38 AM
yeah same here i really like straight forward schematics over the hand drawn
also by push me pull you i meant PUNCH IN THE FACE
i checked push me pull you and it looks pretty promising.. giving the reviews say trannies aren't picky here
has anybody built it?
Pushmepullyou is great. Simple build, not picky about transistors, good octave up good range relatively clean to fuzzy. I haven't built every octave up out there, but that one I built a year and half ago and still use it all the time.
this thing is crazy simple, and sounds great...and the price is right if ya don't wanna dick around too much.
http://www.gssteched.com/G-138P.html
the schem/etc are in the 18volt question thread...uses some pretty stock parts, and no transformer needed.
I built this recently, http://www.forrestwhitesides.com/node/91 (http://www.forrestwhitesides.com/node/91) . I posted a vero layout here http://www.diystompboxes.com/smfforum/index.php?topic=89190.0 (http://www.diystompboxes.com/smfforum/index.php?topic=89190.0) . I wrote that it wasn't verified at the time, but I've built it since, and it works.
Simple build, low parts count, and decent octave up. Good and crunchy as well, typical for a 386 pedal. Bit of a cross between a FTM and a Scrambler.
Cheers,
Dino
hmm I guess I'll build the WTF
looks awesome and i have bunch of 386 lying around. hopefully I can get 2n3906
hmm im thinking what if I put a pot between pins 1 and 8? like the Ruby/little gem Gain approach?
Bobtavia is a simple easy to build octave. You can get all of the parts RS.
bobtavia is a great and simple build (i mean, i managed to build it on some perfboard) but at least on mine, it doesn't track the high e string as well as some others..
oh well as I mentioned before, im not in USA and I dont have RS.... :(
I'll see if ican get 2n3906... I see them a lot in fuzz schematics
Quote from: deadastronaut on February 28, 2011, 06:14:40 AM
hmmm...just found the ousb!..(octave up sick box)..has anyone actually built it off that handrawn schemo?.
Yep, build it you won't be disappointed it's probably the most aptly named pedal ever. It goes from about as clean an octave up as you're going to get to pure fuzzy octave madness.
i believe these peeps will ship world wide, and have an astounding selection of available, affordable parts...
http://www.mouser.com/
ah well teh shipping is gonna cost 45 euros.. that's quite a lot!
Quote from: slacker on March 03, 2011, 03:31:38 PM
Quote from: deadastronaut on February 28, 2011, 06:14:40 AM
hmmm...just found the ousb!..(octave up sick box)..has anyone actually built it off that handrawn schemo?.
Yep, build it you won't be disappointed it's probably the most aptly named pedal ever. It goes from about as clean an octave up as you're going to get to pure fuzzy octave madness.
Yup, me too.
Lotsa fun, that one.
Well, since I have come to trust Doug's taste, I put an OUSB together last night and fired it up. I had to miss the first few minutes of the Daily Show, but it was worth it. Doug's right (as is Gus, obviously). Fun circuit. Certainly does the fake sitar on the bridge pickup well enough (Jawari might be out of a job).
I did a few things different than the original schematic, but not terribly so. I put a 680pf cap in the feedback loop of that first gain stage to keep the frizzies out. Between that, use of a 5532, and the gating action of the series diodes, it's actually a pleasingly quiet circuit. I also put a 4k7 fixed resistor in series with the gain pot so it wouldn't have any no-gain zone. Probably should make that 2k2.
The octave is not strong, though it clearly sounds octave-ish. I'm thinking that replacing the 10k input resistor for the (ostensibly unity-gain) inverting stage with a fixed-resistor/trimpot arrangement might be helpful to adjust gain for maximum octave. I might consider making the .47uf cap in the output switchable for a better sitar-drone sound. Maybe a switch between .1/.047 and the stock .47, just to have some bass cut. It might also be wise to do that with a DPDT toggle and swap the 100uf cap on the ground leg of the gain stage for a smaller value like 2.2uf to cut some of the bass. In retrospect, 100uf is bigger than it needs to be. You can probably use a value as low as 10uf without any bass-penalty.
At higher gain settings, the circuit caves in on itself, with the output gradually blooming. I've gotten that on my FY-2 fuzz and Scrambler when they are pushed hard by a booster stage of some sort. I don't know why that happens, but it is interesting and, if properly controlled. musically useful. I wish I understood how it happens. Not sure the gain pot really needs to be 100k because the cave-in on mine seems to max out when the pot is around 50k or so.
All in all, though, yes a fun circuit, an simple build. Good ROI on this one. Thanks for the recommendation, Doug. :icon_biggrin: Now to get back to the Supertube I started two nights ago.
I simmed the OSUB and posted some thoughts about the cave in here http://www.diystompboxes.com/smfforum/index.php?topic=69289.0 (http://www.diystompboxes.com/smfforum/index.php?topic=69289.0) don't know if that's all there is to it.
Couple of good mod ideas in there as well.
I completely forgot about that thread. Ironically, the mods I made and suggested here were the identical mods I suggested (but never did) 3 years ago.
I'm going to have to try that trimmer balance thing to see if it helps the octave, though I'm not sure I left myself enough room on the piece of perfboard.
Thanks for reminding me! :icon_biggrin:
No problem. I was quite surprised I managed to find it.
It is good to read people have had fun with this circuit. Yes things can be changed but it is what I named it. Players that have used my build often like after they understand how sensitive it can be to gain and guitar volume setting.
Simple low parts count circuit
Sorry to drag this thread up, but does anybody have a verified vero for the ousb?
Gus - no problem with your hand drawn schematic, I'm sure, but I can't translate it to vero!
Thanks