Ibanez TS10 Tube Screamer

Edit 31.7.2016 - There was still one crucial error on the layout, which made the board defunct. Fixed and tweaked a few things around to accomodate the polarity protection etc. *Should* finally be safe to build. 

Banzai Coldfusion

Request.  Hmmm, I'm spotting a few similarities to something else here! :o)  But true bypass switching and so without the famous buffer.  It does have a lot of changes though and some of them will undoubtedly make a difference and affect the final tone, so worth a build for you Klon fans. Note the two required ground connections, just daisy chain the connection or add a column and link if you prefer.

Info about the original:

The Cold Fusion Overdrive is a true overdrive that naturally melts with your guitar and amplifier rather than just changing your sound. The pedal has two distinct fields of application: If the Gain control is set at zero the Cold Fusion is providing more than 25dB of clean boost - more than enough to seriously overdrive the preamp tubes of your amplifier and get a natural cranked amp tone.

When you turn the Gain up past 9:00 you can gradually add more and more distortion. The Gain control is a dual pot that controls different parts of the circuit simultaneously, to produce a transparent, warm overdrive at any setting. The Gain knob and the Tone knob are useable throughout their whole range and are capable of producing many shades of overdrive. The spectrum extends from "touch of dirt" to "bluesy tube sound".

Unlike other overdrive pedals the Cold Fusion Overdrive doesn't have that nasty nasal, mid-rangey taste to it and it doesn't lose bottom end when cranked. An impressive crystal clear boost and fat, dirty overdrive sounds are the hallmarks of the pedal. The active tone control lets you cut or boost different parts of the frequency spectrum with no loss.A true bypass with LED indicator instead of a cheap input buffer and a 2,1mm barrel jack 9V connector are standard features with Banzai.

Revised layout based on the updated Klon layout.  The choice is yours.

Nobels DT1 Distortion

Not too much info around on this beloved cheapo pedal, but it seems to be of fairly good design. For the layout, i've omitted the input buffer to keep the size down. The output buffer has 2SK30-style pinout for couple of reasons. First, the original (schematic states K222E) is not that common. Second, it's just a buffer, so you should have exactly the same results with any NPN BJT in its place. Third, some of you might really want to try this with a BJT instead of JFET to preserve the stock they have. I thought about omitting the output buffer too, but the tonestack has vref voltage in it, so there has to be something to put that out before the output.

Straight-as-straight-can-be Distortion. A must-have for every Hardrock or Heavy Metal player.

Knight KG389 Fuzz Box

Originally sold as a kit, this seems like a nice adaptation of Sam Ash/Astrotone fuzz. Not sure about the original transistors, but my best bet would be on the 2N2222 and other relatively low gain devices. Original also has 50n caps, but i think most of you have stock of 47n caps...

Andrea notes on the comments that the transistors in original ktis are likely to be the ceramic BC108C with golden leads. Updated the layouts transistor notes accordingly.

Update: The transistors in original unit are in fact 2N3391As, as clarified by the awesome Tonemachines blog. And by looking at the datasheet, those are rated at 250-500 hFE, so 2N2222s should be just fine - unless, of course, you can find a batch of 2N3391s somewhere...

Mountainking Electronics Megalith

Request.  To save space I did this using a 3 position on/off/on toggle instead of the rotary switch.  You will get the same selections, 10n, 22n and 33n.  Well you'll actually get 32n with my toggle but it's close enough, although if you do want it with exactly the same values you could always hand select a 22n cap that is closer to 23n :o)  If you want a smaller box than the original, this has the potential to be mounted sideways in a 1590B if anyone is feeling brave, Box of Rock style.

Info about the original:

Create an unstoppable wall of fuzz and vibratory energy, capable of conquering all in its pathway. Its versatile filter circuitry allows for a wide range of tones and textures that allows the Megalith to work well with both guitar and bass.

The MORE HEAVY feature will allow you to cause localized disturbances in the Earth's magnetic field and may cause temporary blurred vision...

So there you have it ... BROOTZ!