I breadboarded this circuit, and stuck a 10k starve pot between +9v and VDD on the chip, like the in the ReezaFRATzitz. However, just dialling the voltage down just a tiny bit adds erratic but full-sounding sub-octave drops as evidenced here -
I've checked over the circuit several times, and it appears to be identical to Charlie Barth's OG schematic apart from the starve pot:
Someone over at madbean had the smart idea to put a Boss BF-2 in the send and return sockets (normally jumpered) on a madbean electric mistress clone and claimed it sounded like TZF
I decided to replicate his findings with the Cosmichorus, allowing for its extended clock range and fully wet mix control (one has to cut the dry through on over flangers such as the BF-2 to get a full wet mix).
Suffice to say the results are excellent
I might try to build a proper TZF pedal from scratch, working...
Hallo, I just completed it yesterday, and it sounds very good (some soundclips coming soon).
It's a very basic PT2399 delay with only time and repeat controls (it does feedback too) and fixed level.
Since I left out the op amp between pins 13 ad 14 I decided to try and make an overdrive out of it; again I only put two controls, gain and volume.
Of course there is space for improvements, but for a very simple pedal that you grab and put on your guitar bag for little jam sessions it's very nice...
Hey there everybody, and greetings from the alleged winter of Bombay, India. The heat got to my head recently, so while I was prototyping some variations around the jordan bosstone circuit for a future pedal I'm coming up with, I salvaged the vero for reuse in an etched enclosure of mine that was criminally unused:
Nothing special here at all. the front end is a stock Jordan Bosstone schematic. I slapped on a volume boost a the back (I would drop the 1k5 to 820 or so for even more rowdiness),...
Hello!
I'm Andrea and it's my first post on this Forum.
I rescued from a flood and repair a Marshall 5275 Reverb but not the pedal and I was unable to find information on the footswitch of that amp.
Found the schematic of the amp on drtube.com
and this video on Youtube
It seems that the pedal I need is a common stereo jack with 2 selectors. Built one some days ago, but there is something wrong (I don't know if in the pedal or in the amp). Maybe the original pedal that i want to clone...
Hello to everyone, I need your help concerning the Generald Gadget's Univox Supper Fuzz. I need to increase the gain of the pedal, like Wattson Classic Electronic's EFY-6 that has more gain than the original pedal. What parts would I have to change to increase a bit of the gain of the Supper Fuzz?
Having a clear out the other day, I found a couple of tubes of 4007UBE ICs. These CMOS beasts have a couple of useful inverters in them (that can virtually behave like op-amps) and an unallocated FET. I remembered using these things for audio routing (Maxon and Pearl did this with some of their 80s pedals), and also had great success with them as high gain distortion devices. One of these included a noise gate, and if the attack was slowed a lot, it was very like a distorted Slow Gear - a very...
This time is a floor based switcher:
- 8 independent loops
- 16 presets organised in 2 banks
- direct access mode for individual loops command
- 6 switches for changing amp channels or for other purposes
Hi people.
I'm pleased to introduce this fantastic unit of delay with compander, pt2399 based, with the LFO of one well known pedal, boss CE-2. I found it in a Italian web, the proyect has Creative Commons licence, so ts free for all DIY community.
This is my finished unit, don't joke, the sound is more similar than apears.
Sorry about the poor quality of the shots, it's night here. And sorry for my bad english.
The schematic is verified.
I am trying to build an onboard buffer for my guitar. I just finished building a Klon Buffer and even with a OPA134 opamp, the circuit is noisier than expected. My noise floor recording direct with it is -84 dB. When I was using a cheap Artec QTB onboard preamp my noise floor was -90 db (the bottom of my soundcard's floor).
The Klon buffer sounds much better though than the Artec QTB - high frequencies come through much more beautifully. But the Klon is also clearly comparatively noisy, and...
Ive been toying with ideas to reduce ripple from less than optimally filtered wall warts for more sensitive circuits (Fuzz Face, Fet ODs etc) and here's one open for discussion. It's your basic BJT capacitance multiplier. I haven't done any breadboard testing yet only sim, but it has some interesting properties. Obviously there's no free lunch here. We have to give up .7 volts and add a component but we get about the same filtering as the circuit on the right (traditional RC) and have...
I'm looking to implement a 2 band graphic EQ that can both cut and boost. I happened across this geofex article that seemed to give me what I want, the article is here:
and this is the schematic:
greq.gif
But that's not really a gyrator, is it? It's not like this:
gyrator4.gif
ANNNNND... the math doesn't work either. I can't plug in the values indicated there and get sensible results from a gyrator calculator.
So I went hunting and found the original article that Mr. Keen referenced,...
Ksenanekro's post about the MOD kits Aggressor reminded me I'd done a layout for their Trill Tremolo. I hate wiring up pots (well hate is a strong word, but it's not my favorite), so I designed it to have onboard pots. Anyway, here's the layout:
I didn't want to get this out here until I had the deluxe version done.
This is a seriously expanded version of the Tim Escobedo PWM.
The effect toggles between regular octave and octave down and has a switchable 2nd octave down that is not toggled.
The low pass filter is sweeped by a stepped triangle formed by a walking ring counter that is clocked withe the same clock as the arpeggio effect.
The filter on the octaves can be in or out of phase. plus a manual filter control is also...
Was trawling through my old pedal files recentl and found the this schematic lurking in my Lovetone folder. It's a fuzz/distortion/dirt circuit designed by Dan Coggins (Lovetone + Dinosaural designer) for ETI magazine in 1993. Having breadboarded it, I like the sound a lot (like Timmy's vulgar older brother), the tone pot seems to be a nice useful variation of the BMP.
fuzztone1-1.jpg
I knocked up a vero which looks ok to me, but comes with the caveat that I haven't actually built it yet....
I found a bag of J201 JFETs recently and thought I'd try out an overdrive. I came across the ramble fx marvel drive and had a play with it on the breadboard. The normal channel on it's own sounded very nice, with a great range of gain but was a little bright for my taste, so i turned the filtering at the end of the circuit into treble roll-off pot.
JFET drive_schem_nocentelli.jpg
Incidentally, after I'd done the layout below and was just about to strip the breadboard to solder the bits...
I got this Vox Ice-9 Overdrive in for repairs today so though it worth while taking a few pics. The problem was that the footswitches were not working, quick check and replacement of the flip flop 4013 chip and all is working again. I'm not sure how long I can hang onto this or if I will get time to trace it, but it is a nice sounding pedal.
I'm a big VOX early AC series freak. I like that early AC30/4 and AC15 pentode channel a lot
Recently - two months ago or so I have purchased Merlin's second edition preamp book. It contains great section dedicated to pentode based preamps
It seems that Mr Blencowe doesn't like the idea of using penthode to serve as an first gain stage (pron to microphonic, noisy) and suggested to use it as a second stage preceding by triode. Merlin also suggests that the Vox's pentode...
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