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Topics - Guitarmageddon

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Build Reports / 808, Trem & Champ
« on: April 02, 2016, 07:40:56 PM »
A few things off the bench...


No cab yet, might put it in a head shell. For fun, I've been running it through a Slant Marshall 2x12.
Man, only 5 watts, but it sure can push some air!

Optical Trem
 I've built heaps of these, love 'em.

TS808 with mids and clipping options on toggles.

This is a BYOC board filed down to fit a 1590B. You have to sacrifice the outside pairs of traces, but other than that it works fine. I had to put the board face down to get clearance on the toggle switches, so it's not very pretty. I just cover the whole lot with a business card.   ;D

Build Reports / Zappa for President!
« on: March 21, 2016, 06:23:25 PM »

Karate Chop/ Harmonic Energizer.

If you're not familiar with this circuit, it's the rare, powerful and gritty notch filter used a lot by Frank.

Build Reports / Barn Owl
« on: March 17, 2016, 08:39:49 PM »
I love the different things I get asked to do, especially when it is finished with; "Oh, and can you etch a barn owl on it?"

Codtone "Bunyip" Overdrive paired with a TH Parametric EQ.

Yes...I did put the ICs into the Od...eventually.    ::)

Build Reports / A Star Wars related Pedal...
« on: March 12, 2016, 10:44:59 PM »
Forgot to add this one to my last post...
I've observed a long lineage of Star Wars themed pedals over the years I've been on these forums, but somehow never wound up joining that club...until now!
The Darkside, a SHO  into a Muff...they really just go together so well! (it's something that seems to work an anatomical level too... :wink: )

Snagged that image a while ago and had been waiting for the right moment. Reverse etched well.
Muff is a hybrid Triangle with Civil War tone caps and a scoop/flat/hump toggle.

Build Reports / AFOMFRB (A Few of My Favorite Recent Builds)
« on: March 12, 2016, 03:51:00 AM »
Had quite a busy month...A couple of these are things I've built before, (Britannia,Party Mammoth and Machete) but they're cool so I'm posting the Mk II builds.

Britannia AC 30 emulator paired with with a Stratoblaster Booster...

Party Mammoth II
Wooly Mammoth & Pseudo Ring Modulator with an optical control.

A Rat with variable Ruetz, Whiteface/turbo/you dirty  clipping modes and a clean blend.

Dream Weapon III
A dual optical tremolo and Vox Repeat Percussion.
Rej/CJs Electric Boogaloo and a modernised Repeat Percussion with an extra stomp to switch between two rate controls. The VRP and Dream Weapon is all thanks to forum member KayCee who has built all this several times before. Thanks for referring this client to me mate!

Build Reports / Mind Bender
« on: April 08, 2015, 10:15:54 PM »

Russian NPNs.

A really rough demo. Mics were clipping and out of phase...  ::)

Build Reports / A Perky Pair
« on: April 04, 2015, 10:06:10 PM »
...of Harmonic Percolators.

I'm really blown away by this circuit. I'd put off building it for a long time because of it's "vagaries," but it's  really unique, has a squishy Ge feel, but a clarity with chords that I've never come across in a fuzz before.

Used Russian PNP Ge (about 70hfe) and a BC109 for the NPN. I have some 2N3565 (as per the original) but found them too noisy.

Scored some beautiful glass NOS 1N695 diodes, (again, as per the original) they have a really low forward voltage- under 200.
I can part with some- $1 usd a pair + $2 for postage worldwide, if any of you diode junkies want to try some shoot me a message.

Build Reports / The Growler
« on: April 02, 2015, 12:43:07 AM »
A super tonally-neutral overdrive of my own devising. This one has an extended range for bass, (though it sounds just as good with guitar) and does a great Entwistle type grind.

Got a 3-way switch for a few different clipping modes.

Build Reports / Party Mammoth * Demo added
« on: March 26, 2015, 12:14:35 AM »
A Woolly M***moth Fuzz, but with a second stomp for "Party Mode"- which adds a Logan 5 ring-modulator.
Ring modulation can also be controlled by waving a hand or a foot over the optical sensor. 

Transistors are nice BC109s in the fuzz. Guts a real mess I re-worked them a few times. Originally it had a feedback loop, then I added the ring mod but found I had carrier noise issues. Shielded the input line and rearranged things now it's nice and quiet.

Oh... and the party hat lights up when the Ring mod is active.


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Build Reports / Micro Amp
« on: March 19, 2015, 12:13:12 AM »
MXR Micro Amp clone
Hadn't heard one before , but it's nice, very LOUD! (26db) with a very flat frequency response. 10k has a chub. ;)

Build Reports / Tube Driver
« on: March 14, 2015, 11:07:15 PM »
My build of the THcustom Tube Driver.
Sounds nice, I've kinda missed the boat on these valve designs I'm seeing around.  I've had people asking "why don't you build something with a tube in it?" for so long. Never thought it worth the trouble at low voltage. The charge pump in this one puts out 70v from a 9v supply, or 100v from my 12v one. It's a really fun project and Thomas is a nice guy to deal with.

Spent about a week debugging it because I stupidly soldered the tube socket to the wrong side of the board.  ::) Thanks for you help Thomas.

I've run through a bunch of them, and some were definitely nicer than others, but find a 12AX7 to be too much gain for my taste, got a 12AU7 in there at the moment which I like much more, but getting some 12AT7. I think they will strike a nice middle ground. Decay can be a bit fizzy, I'm hoping tweaking the bias will fix that. Added a 100pf cap to ground to shave off a little brightness too.

Build Reports / Fender Blender *demo added
« on: March 05, 2015, 01:43:46 PM »
Has some old 2N3391 transistors, all the way from Bulgaria, and an octave defeat on a stomp instead of the tone switch. Very loud, very versatile, very nuts too.

Rather than do the octave defeat the usual way, breaking the connection of one of the half wave rectifier diodes, the switch alternates between the diode and a 1uf cap. Makes for a much better sounding fuzz with the octave off.
If you're having a slow day at work, play "spot the missing wire."   ;)


Build Reports / Evil Twin
« on: March 01, 2015, 02:04:38 AM »
The Evil Twin, a pair of Swamprats (Plexidrives)

Great individually, but they stack together well too.

Open Discussion / Companion Psychadelic Machine
« on: February 19, 2015, 04:29:51 AM »
A RARE univibe/Superfuzz combo, also does a nice tremolo. Thought some of you might be interested in seeing it. It's here for repair, I've got it going now though and think I might do a little cloning. :D

Build Reports / Various Etched Enclosures *Theremin Demo Added!
« on: February 19, 2015, 12:41:10 AM »
Hey all! Here's a bunch of recent builds.


The Harmonic Sink (Harmonic Energizer)

Added an expression jack for the Q control.

Syncrotron ( Mega Chorus.Vibrato)

A baffling number of parameters, so I gave them appropriate- and real, thematically related names. 

I built it with MN3007 and a bigger regulator for maximum head-room.

 "el Segundo Primo"- working up my "useful" Spanish for my imminent trip to the US!

Made a few mods, but really dig it!.

Love these resin knobs!

Hadn't boxed it, but posted this demo a little while ago.

CMOS Theremin

Guts are a mess, originally I had a stripboard Rub-a-dub reverb in there too, but it was too noisy. I don't know what the enclosure is, but it measures 170x120x55mm, so it was fun to have that much area to work with. The large and quite thick enclosure seems to make a good aerial.

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