Axis Fuzz - Cloning One of the Originals!

Fingolfen

Well-known member
Build Rating
5.00 star(s)
I'd heard a lot of good things about the Roger Mayer Axis Fuzz, so I decided it was high time to see if it lived up to the hype (spoiler alert, the answer is YES!).

SOFX Kick-Axe - Alxasaurus Fuzz - 01.jpg

I'm once again starting with a South Obolon board - this time the "Kick-Axe Fuzz" (I don't have a Steggo version... yet). The layout is clean and neat, and the component count is low. For this particular build I'm going ahead and using all modern components rather than trying to invoke the mojo of vintage bits. The resistors are all 1/4 Watt metal film 1% tolerance from Yageo or KOA Speer. The film capacitors, there's only three of them, are all Kemet. The electrolytic capacitors are all Nichicon. The two transistors are both modern production - one is a 2N3904 and the other is a 2N3906.

SOFX Kick-Axe - Alxasaurus Fuzz - 02.jpg

As there was only one extra ground pad on the board, I decided to go with a star ground to the input. All of the jack connections are insulated with heat shrink tubing. I also used a new 3PDT switch daughter board. Drunk Beaver Pedals was kind enough to post the Gerbers files for a stomp switch daughter board that included not only two locations for the LED, but the option of including a dimmer switch on the indicator LED itself. He was also kind enough to let me make a couple of modifications to the original file to personalize it with the Steggo Logo while still giving him credit for the original layout.

The main PCB already included an LED current limiting resistor, so I jumpered the CLR and trimmer on the board for this build, but I do plan on using them on some future builds! Even with the extra unused parts, I find it easier to solder the LED directly to a board as opposed to hand wiring it, and the positioning of the LEDs on this board lined up with where I already wanted to place the LED in the enclosure.

SOFX Kick-Axe - Alxasaurus Fuzz - 03.jpg

Speaking of the enclosure, this one has another fun dinosaur - the Alxasaurus - once again done by Ukrainian artist @estelkatrin (on Instagram). The font is similar to the one used on the original Hendrix Axis: Bold as Love album cover which also features a sunburst on the cover art.

Despite only having a volume and fuzz control, I really found this to be a great fuzz pedal. It certainly gives you a variety of classic fuzz tones, especially with single coil guitars, and may end up replacing the Tone Bender Mk III clone on my pedal board as my primary fuzz going forward. I'll see if I can get some tone demos going soon!

Tiny bit more at the blog (mostly dino info and some more background on the original pedal): https://steggostudios.blogspot.com/2023/02/off-axis-fuzz-cloning-one-of-originals.html
 
I'd heard a lot of good things about the Roger Mayer Axis Fuzz, so I decided it was high time to see if it lived up to the hype (spoiler alert, the answer is YES!).

View attachment 42252

I'm once again starting with a South Obolon board - this time the "Kick-Axe Fuzz" (I don't have a Steggo version... yet). The layout is clean and neat, and the component count is low. For this particular build I'm going ahead and using all modern components rather than trying to invoke the mojo of vintage bits. The resistors are all 1/4 Watt metal film 1% tolerance from Yageo or KOA Speer. The film capacitors, there's only three of them, are all Kemet. The electrolytic capacitors are all Nichicon. The two transistors are both modern production - one is a 2N3904 and the other is a 2N3906.

View attachment 42253

As there was only one extra ground pad on the board, I decided to go with a star ground to the input. All of the jack connections are insulated with heat shrink tubing. I also used a new 3PDT switch daughter board. Drunk Beaver Pedals was kind enough to post the Gerbers files for a stomp switch daughter board that included not only two locations for the LED, but the option of including a dimmer switch on the indicator LED itself. He was also kind enough to let me make a couple of modifications to the original file to personalize it with the Steggo Logo while still giving him credit for the original layout.

The main PCB already included an LED current limiting resistor, so I jumpered the CLR and trimmer on the board for this build, but I do plan on using them on some future builds! Even with the extra unused parts, I find it easier to solder the LED directly to a board as opposed to hand wiring it, and the positioning of the LEDs on this board lined up with where I already wanted to place the LED in the enclosure.

View attachment 42254

Speaking of the enclosure, this one has another fun dinosaur - the Alxasaurus - once again done by Ukrainian artist @estelkatrin (on Instagram). The font is similar to the one used on the original Hendrix Axis: Bold as Love album cover which also features a sunburst on the cover art.

Despite only having a volume and fuzz control, I really found this to be a great fuzz pedal. It certainly gives you a variety of classic fuzz tones, especially with single coil guitars, and may end up replacing the Tone Bender Mk III clone on my pedal board as my primary fuzz going forward. I'll see if I can get some tone demos going soon!

Tiny bit more at the blog (mostly dino info and some more background on the original pedal): https://steggostudios.blogspot.com/2023/02/off-axis-fuzz-cloning-one-of-originals.html
Hi,
Looks like a nice build. I like the artwork on the enclosure.

I've built a couple of these pedals but never really enjoyed playing them. The overall gain of this pedal is outrageous and noise level as the gain control (2k pot) is turned up can be a bit much. Recently, I figured 'what have I got to loose', and started modifying one of my boards. I found a new site that had a really nice clean schematic that was actually drawn correctly. I used to draw schematics and PCBs for a living, so one of my pet peeves is seeing a jumbled up mess of schematic drawing.

I'm curious if you have deviated from the original Axis schematic? After completing your build, were there things you'd change a second time around?

Have you tried changing the value of the 39k resistor running from Q2's emitter to ground? I changed it out for 22k, which gave a little less gain but also seemed to reduce the noise level. Another change I made was to add a 470 ohm resistor in series with the 2k pot lead that goes to ground. This seemed to clean up more of the noise as you maxed out the knob. Basically, this change change just keeps the pot from zeroing out. The fuzz started sounding more usable - more musical sounding.

I've read about some other mods and will try incorporating them in my quest to get this pedal to something I enjoy playing.
 
I went with the original layout - but I may try breadboarding your ideas to see if I like those (or other) mods.
 
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