Drum Roll Please........Introducing the XOR Ultra Sick

[bluesdevil]

Yeah Jeff, I'm lamenting the wait for the 4070 chip but I will build this thing as soon as possible!!
Here's the thread with the Simple Octave Up clips:
http://www.diystompboxes.com/sboxforum/viewtopic.php?t=33916

These were done with bridge pickup for the nastiest fuzz sound.  The "octave" sounds better with the neck pickup and tone rolled down, but I like the scorching qualities the best. Thanks for bringing this great circuit to my attention a while back, maybe others will give it a try as well.

[ethrbunny]

I started building it yesterday. Still a bit puzzled how the 5088 is going to work but.. Im a believer - as the song goes. Getting all those inter-pin connections on the 4070 is a pain!

[Arn C.]

Curious what pots are you guys using for this effect?

All linear except for volume?

I am in the process of building this circuit.....

Also, I don't have any 2N5088's but I have other that will work, what is the approximate hfe I should look for?  I have some with 168,246,358.
Should I use a transistor with high hfe, low hfe or middle of the road hfe?
If it matters.....

Thanks!
Arn C.

[Arn C.]

BUMP!

[MartyMart]

Curious what pots are you guys using for this effect?

All linear except for volume?

I am in the process of building this circuit.....

Also, I don't have any 2N5088's but I have other that will work, what is the approximate hfe I should look for?  I have some with 168,246,358.
Should I use a transistor with high hfe, low hfe or middle of the road hfe?
If it matters.....

Thanks!
Arn C.

I'm nearly there with mine, just want to get my DIY Boss AC-2 working
first - its a bugger to de-bug !
I'll go with linear for all pots including vol, I'm just liking that taper for
just about everythinh these days
My 2N5088's are all in the 350-600 range, so go with your 358 and see
how it sounds.
I'd say that 5088's are "medium to high" gain in general .
How are your "blue tobbaco tins" going Arn ??

Regards,
Marty

[Arn C.]

Thanks for the info!  I am goig to try all three gains(low, med, high) using a switch to switch one on at a time.   Good for three more options!  

How are your "blue tobbaco tins" going Arn ??

Ha Ha     Too cool aren't they?  They are only good for real small circuits, so I don't make too many of them.   I have about 40-50 empty cans just sitting around.   I may try something different with them, maybe have a different circuit in each one then plug them into a base which will contain the jacks, power and switch.  Peace! Marty!

Arn C.

[ethrbunny]

Build report:

Finished it this morning. For fear of waking up the family I only did some low volume preliminary testing.

Certainly produces a serious fuzz tone! Couldn't get much action out of 'spew' and 'sick' though. 'hurl' acted more like a noise gate with sound only coming through at the middle of the pot. (I might have 'hurl' and 'retch' swapped in my head.. Ill reconfirm later). 'retch' acted like an additional volume pot.

I won't be able to tell better without more testing though. Ill put the kids in the yard, get out my earplugs and try some more settings.

edit: I didn't have .02u - had to use .033u instead. Hope this doesn't muck it up too badly.

[Arn C.]

Howdy All,
  I almost have mine completed.  I did a few mods to mine.  
I put two switches in, one switches value of input cap(two options) and the other switches output cap(also two options)
  I also put in a rotary switch with 4 different transistors attached to it.  So I can switch between different gain transistors.  The approximate values are 102hfe,  283hfe,  358hfe and 465hfe.
  I also put a trimpot on the collector instead of the 10K resistor for fine tuning, with a hole in the case to access it easily!  

Can't wait till I get it completed to try it out.   I have about an hour left to finish.

Peace!
Arn C.

[jmusser]

For some reason, I didn't get an E mail note saying there was activity on this post, so I didn't get back to it. The pots are all log types. You will have to crank the thing up for sure, and then you'll find out that the first two pots will interact with the last two. The stuff they do is a bit more subtle then the last two. It seems like the 2nd pot, has a lot to do with tone control, as far as giving it a filtered or unfiltered tone. Sometimes you won't notice much of a difference by adjusting the first two, until you've got your octave echo happening or whatever, and then it will help fine tune that. You'll see what I mean. I didn't pick out a 5088 with a specific HFE, because the original DOF didn't call for any specific HFE range, and that's what this circuit is bassed on. If you work with it for awhile, and can't get some of the tones I've talked about, then let me know, and I can at least ball park where the settings have to be to achieve them. Some of the one and two octave tones, are only in a small area of adjustment, so it may be a better choice to go with linear pot's for that part of the effect. All the stuff I talked about is there if you have patience and document your adjustments. I'm glad you guys are taking the plunge on this circuit, and I'm looking forward to hearing about your results and mods.

[slotbot]

i am looking to make on eofo theses a soon as i get the next few comissions out of the way.

if anyone gets a sound clip up let me know!!!i fully intend to use my on a bass as opposed to guitar.




scott.

[ethrbunny]

The family was out and about today so I plugged this board into my combo to have some fun. Still not getting any real change out of 'sick' and 'spew'.. might be time to debug those connections. Was enjoying the sputtering at the end with the overall sound. Kind of like a noise gate gone bad. I'd love to find some way to keep 'retch' or 'hurl' from sending the volume up so high. Maybe some way to change the layout so the volume does its thing and the other two feed into it.. dunno.. it has some fun potential. If I can get more span out of all the pots Ill box it up.

[jmusser]

Ethrbunny, are you able to get the tones out of it that I was able to? This thing is far from being a "perfect" circuit, and I'm sure it could use a lot of tweaking to take it from a good effect, to a great effect. It may be, that all the pot sizes could be lowered to make the volume more manageable, but I was afraid that maybe the effect that was created might diminish, especially where the echos are concerned. The gain on this thing is very high, so that's why Marcos added the master volume at the end.

[ethrbunny]

Ethrbunny, are you able to get the tones out of it that I was able to?

I don't think Im getting everything you describe. Im planning to take another pass at it with the meter and see what / if anything is amiss.