Building A Klone Of The Klon Centaur

This post is long overdue, since I already posted about building the Klon Buffer in 2012. This is around the time that I built my Klone as well, but I never made a post about it.

Back then I was obsessed with reading about the Klon and how people would pay $1000 for the right one (this was before the KTR, just after it was reversed on FSB). Now Klones are ubiquitous and even major pedal companies like EH and MXR have their versions, sometimes even in a tiny 1590A format.

When I build mine it has to be perfect, I thought, and since Analogmike swears by carbon composition resistors for his Sunface, they must sound better, so I'll build my holy grail pedal with carbon comps as well. Those are the big brown cylindrical ones. The modern KTR is built with tiny surface-mount resistors that are used in many modern electronic devices. Go figure.

I found this vero layout project on FSB (click the link for the full file):

Back then I didn't do my own layouts and didn't have a schematic. I simply trusted it would work. And luckily it did!

The pcb turned out nicely, but the offboard wiring was a mess and I "insulated" it with tissue paper (real classy). It only had a battery snap, no power jack, and would whine loudly when the battery was empty, because of the voltage doubler. It wasn't really reliable and I lost interest after a while and lent it to a friend (who kept it for a few years). A few weeks ago, I remembered the pedal and got it back. Now that my pedal making skills had improved a bit, I realised the PCB could be easily salvaged and the pedal "refurbished" to make it more reliable and easy to use. So I took it apart, drilled another hole in the side, cleaned the enclosure, flipped the pcb around, and changed the switch (optoswitch) and wiring (no battery now).

Looks and plays great now!

Building A Clone Of The Crowther Hotcake

A friend of mine who is a musician from NZ asked me to build him a Crowther Hotcake because it would be difficult to get one in Europe.

I researched the cicuit and it turns out there are different versions of the Hotcake, which Paul Crowther has been building since the 70ies. Apparently the versions sound a little different and there are two schematics online, one of the 1977 version and one of the 2003 version.

The early version (1977) only has two knobs and a presence switch. The newer version (2003) has three knobs (Crowther turned the presence switch into a knob), but with a millenium bypass style switching circuit. I decided to combine both versions and basically make a true bypass version with three knobs. This is the schematic:

I made a PCB with Eagle but there is also a vero version over at tagboardeffects.

The final result looks like this (I made two, gave one to my friend and kept the other one):

Building A Clone Of The Analogman Sunface

About a year ago I decided to take this guitar pedal thing to another level, so I learned eagle, founded a company and started making my effects look a bit more professional. That was at the same time I discovered Oshpark and realised how easy it would be to design a PCB and get it fabricated for cheap.

One of the effects that I always loved building as well as playing was the humble Fuzz Face. Easy to build, difficult to get a great sound out of and very particular about its power requirements and place in the signal chain (always first!). I had built a simple PNP germanium fuzz face for a friend (my first pedal) and a Joe Bonamassa spec PNP Fuzz Face with russian germaniums. But they needed batteries, and I didn't want to add a power jack for positive ground when that could fry my other pedals daisychaining it.

Another Fuzz Face I have always been lusting after was the Analogman Sunface. It sounded great in those Gearmanndude videos and others. And there were different versions with different transistors, but they all sounded good. Another thing I liked was the bias/sundial knob, because that would allow me to get different sounds and adjust the pedal during different ambient temperatures (germanium transistors are finicky regarding changing temperature, Hendrix apparently put his FF in the freezer prior to recording).

So I looked at the schematic (it was traced and very close to a regular Fuzz Face), and converted it to NPN to play nice with my power supply and to be able to use silicon or NPN germaniums (Which I had bought cheaply).

And I made a PCB in Eagle. Oshpark accepts Eagle files directly and sends out 3 PCBs with world wide free shipping. They are very high quality prototype boards (one can unsolder components several times without damaging the PCB itself).

Next I picked up some mojo looking components (carbon comp or 1watt metal film, axial caps) and some NPN russian germanium transistors (I bought a box of MP38A, which fall right into the goldilocks zone for Hfe, low leakage and are very decently priced) and went to work.

The other thing I did is design a front plate, which is a PCB without copper traces (it only has the writing on it), which I also designed in Eagle. I called it SUCHAHARDFUZZ, since I named my pedal company suchahardman guitar effects, a pun on my name.

The end result is a great looking and sounding fuzz. I made two and gave one to my cousin for christmas. This fuzz face is NPN and thus can use a regular power supply with other effects in a daisy-chain, as well as batteries (though my personal pedal doesn't have a battery snap anymore). I also used an opto-switch which I will present in another post soon.

New website, maybe I'll resurrect this blog

I have recently - a year ago - rediscovered my interest in building pedals and decided to make this pedal building thing a side-business. I have started a website called suchahardman guitar effects. My Instagram account also shows a few things I've been working on since.

As this blog amazingly is still generating views even though the posts haven't really been updated in 7 years, I decided to write a little post linking my website just in case. Maybe it'll generate a few clicks.

I strive to build and create even more than before and shown here. I will try to write a few posts throughout 2019 explaining what I've been working on to maybe inspire and help people like my 5 tiny posts have been doing in the past 7 years.

Btw, I still make that booster pedal that was inspired by the Deep Blue Delay buffer. It looks like this now:

I also learned Eagle and made a few analog delays based on the Way Huge Aqua Puss and others:

Building A Clean Boost Inspired By The Deep Blue Delay Buffer

I had modded my deep blue delay clone for a volume control because I heard about volume drop issues, though I have none of them, but I really like the clean boost it gives me.

Unfortunately I barely use the boost because I don't want the volume jump when turning on the DBD. So I thought I'd try the buffers w/ volume mod as a standalone boost, giving me more flexibility for lead boosting, etc.

I extracted the buffer circuit from the DBD schematic including the volume control (which I upped to a 50k to give a little more boost than my DBD clone). The cool thing is, if this is turned to 0 on the volume, it simply acts as a unity gain buffer:

Based on that I drew up a stripboard layout (my first real layout, yay!). The goal was to keep it simple, not pretty, and to fit into a 1590A, because I believe saving real estate on a board on something as simple as a clean booster is of a higher priority. It turned out quite well, and there are no stand-up resistors, which I prefer:

  
This one is verified and sounds quite good! I really like it! Here is a picture of my finished build:

Building A Clone Of The Eternity (Burst)

After having been quite frustrated with my Tubescreamer-like SRV Special that was one of my first builds ever, i decided to give the old TS circuit another try. This time I chose the Lovepedal Eternity (which is a tweaked TS circuit) for several reasons.

The first reason was a discussion on FSB regarding opamps in SIP (single in line) format. Instead of the usual square look with 4 pins on each side, they have all 8 pins in one line, making the IC very compact in vero layouts. IvIark on FSB posted a layout for the Eternity Burst that featured a SIP-8 NJM4558 opamp:

Incidentally, I had all the necessary parts lying around, and since it was a pretty easy build, I decided to give this one a go. The Eternity is basically a TS circuit without input and output buffers and several tweaked values, making it sound fatter and more open. I managed to wire the board, drill the enclosure and finish the pedal in two afternoons. 

I used an Eddystone 1590B-sized enclosure (the original comes in a 125B, which is a bit bigger) and tried to stick to the original knob and LED layout. I like that look a lot.

A couple of interesting points:

• I found the 500kB pot for the gain to have an uneven spread. The gain would suddenly jump up at around 8-9 o'clock on the dial. I prefer a log pot here (500kA).
• The pedal is rather bright, i preferred a linear 1M pot for the volume. Because the volume control interacts with the output coupling capacitor, the 500k sounds much brighter than the 1M. The downside to this is, since the Eternity doesn't have an output buffer, it is influenced by whichever pedal comes after it. Because upping the volume pot increases the output impedance (ideally we want a very low output impedance) this dependence becomes more apparent. This is rather annoying so i resorted to using a 500kA and turning the tone knob way down (9-10 o'clock). Some Eternity versions have a 22uF output cap and a 100k pot. I might try that in the future.

I'm planning on finishing the enclosure. I'm not sure which color I'll choose, I guess a burst finish would be nice, but that would be a little difficult. The LED is a 5mm waterclear green superbright. The Eternity also comes in white so maybe I'll try that.

Building A Clone Of The Honey Bee OD

A week ago or so, I finished building a Honeybee clone. I went with the madbean pcb (discontinued) and bearfoot version of the circuit. The enclosure is a brush-painted Eddystone in gold/apricot with a adhesive decal and clearcoat on top. Here is a photo after the box was clearcoated. The decal was made full size including the knob, led, and switch locations.

As of yet, it is missing an orange LED and proper bezel that are still in the mail. Sorry for the rip-off font DonneR, but don't worry, i will not give this one away, ever.

Knobs are from Tayda. I prefer them to the originals actually. Those can be ordered here by the way. (TK-1124-6MM). They are 6mm knobs and won't fit the 1/4" shaft of regular alpha pots though. Here is a gutshot. 

That's about as neat as I can go, so far. Notice that I used 1n4148 diodes instead of the 1n4007 the original uses, as I socketed the diodes first while forgetting that the 1n4007 have thicker legs that won't fit the sockets. I might try to tack solder thinner legs to them later on.

Update (May 9, 2012): Finally completely finished this pedal. I installed an orange LED and changed the 1n4148 diodes for 1n4004 (i didn't have 1n4007s but they should be identical) and I prefer them to the 1n4148s. The 400X are smoother and compliment this pedal very well. I can see why Björn prefers them in this circuit.

Here's a picture: