Build Reports

Showing 8 build reports for the Halo project. Submit yours →

Jeff
Score:
5

Rate it:

Big Muff 2.0

Project: Halo (Big Muff Pi)
Variant: Green Russian

Build description

Awesome pcb. This was my first ever pedal build, and I’m glad to announce it went off without a hitch.

Modifications or part substitutions

Mid mod. I couldn’t find a 12n cap so I substituted a 10n. I also made the clipping diodes switchable between red LEDs and 1n914 diodes, in both clipping stages. The emitter resistors in the clipping stages are also switchable between 390 ohms and bypassed.

SonicArt77
Score:
3

Rate it:

Respect the Muff

Project: Halo (Big Muff Pi)
Variant: Green Russian

Build description

This was really easy to build. No snags. The sound is awesome!

Modifications or part substitutions

I bypassed the mid and just went 3-knob. For D4 I ended up using a 1N4148 because the store I got parts from only had three 1N914s at the time.

Chuck
Score:
3

Rate it:

Red Army Overdrive

Project: Halo (Big Muff Pi)
Variant: Red Army Overdrive

Build description

My third build in the Halo series, first with the new (to me) board. Straight up build of the Red Army Overdrive with the presence/mid range control. Did a low volume test (past my Grandson’s bed time) but initial result is impressive. Not sure where I got the box but all the fiddly electronic bits came from Mouser; pots, jacks, knobs and switch came from Small Bear; the green wire from Guitar PCB; and, of course, the Halo v1.5 and 3PDT boards from aion. Can’t wait to turn it up tomorrow!

Modifications or part substitutions

Presence/mid range control.

dani_boy79
Score:
2

Rate it:

Big Muff Pi(Halo) Build

Project: Halo (Big Muff Pi)
Variant: 'Red Army' Variant

Build description

another perfect build …once I followed the Documentation, there was no issues. All parts were sourced from Samllbear & Mouser. I had fun with the Graphics & enclosure color, lol.

Modifications or part substitutions

stuck to the Variant listed.

Bonerack Jack
Score:
14

Rate it:

EH Big Muff Pi PCB and pots swap out

Project: Halo (Big Muff Pi)
Variant: Violet Rams Head

Build description

Basically I just removed the stock EC 3003-A PCB and replaced it with a Halo PCB with components I chose and I soldered myself. I also decided to install new pots while I was at it. It now sounds amazing.

Modifications or part substitutions

I cut the legs off one of the original pots and soldered them to my new tone pot at a right angle. I then soldered the legs to the PCB so the board would be secured inside the pedal by the tone pot. I also installed the original battery clip connector as well.

Lluís Doval
Score:
11

Rate it:

Big Muff Pi

Project: Halo (Big Muff Pi)
Variant: Triangle

Build description

Glad to be the first costumer submiting a report here.

One of my favourite pedals, the Big Muff, made with a great pcb. The very best thing of making a pedal with Kevin’s pcb’s is that no matter if you are a nooby (as I am) or not. All the projects come with fully instructions easy to follow. Any doubt is answered quickly.

The pcb fits easily in a 1590b or 125b if you want to ad a 9v battery clip. It’s designed to put board mounting pots and you can make a lot of variations of this great pedal.

Another goal is adding a 3pdt board, saves time and keeps wiring more neat.

This is one of my first pedal ever builded, and even without any electronics or soldering knoledge. Total cost, less than 30$

Great job, Kevin

Lluís Doval
Barcelona, Catalonia

Scott Gottschang
Score:
1

Rate it:

Gott BMπ?

Project: Halo (Big Muff Pi)
Variant: Violet Ram

Build description

This was my 4th or 5th Aion build and again I am extremely happy with the PCB and documentation. I love that there are so many mods and options to select from.
That being said, i built a very stock Violet Ram. I used 2N5088s and 1N914. I built the 3 knob version. It was a fairly clean build for me and I used the technique that I describe in my Mostortion build report to connect the micro 3PDT bypass PCB to the switch. It sounds just like a fuzz pedal should.

I the last 2 pedals I build I attempted to use a printable t-shirt iron-on transfer. I found this rather problematic. I would either use too much heat and melt the transfer or not enough and end up with bubbles and such. For this pedal I used a clear printable adhesive transfer. No problem getting to stick or print, but the results are not that great either.

Modifications or part substitutions

The only ever so slight modification I did was to use a 3.9nf cap in the C10 position instead of a 4nf cap.

CHITO
Score:
1

Rate it:

HALO FUZZ – BMP CLONE

Project: Halo (Big Muff Pi)
Variant: Triangle

Build description

RESISTORS: All 1% metal film – NO value substitution here

CAPACITORS: Panasonic solid polymer cap on C!4 A rare NOS Sprague .004uF 1KV Sprague ceramic cap for C10. Two more rare green-colored .05uF NOS ceramic caps for C6 & C9. I had all of these old caps since 1988. All the other caps are 5% WIMAs + a large blue 1% .01uF Vishay box cap on C11.

TRANNIES: All 2N5088

DIODES: I just used two 1N4148

I had to bypass the AMZ Mid / Presence control because I already had this stainless steel enclosure with 3 pre-drilled & straight-aligned pot holes (pretty much looks like a genuine Big Muff) which I scored in eBay about 2 years ago. Ironically, my build is a Triangle variant.

FYI, I use a P-touch 2730, Mac & Win compatible tape printer for the labels, 3M vinyl car wraps for color & aesthetics and a non-polarized & wired LED assembly sold at eBay & made by Alpinetech / Model# PLB-6. I used ribbon cables for the pot connections.

TESTING EQUIPMENTS: Marshall JVM 205H head / Marshall 1960A cab / IBANEZ S5470Q guitar. Jackson Japan-made Warrior guitar with genuine SD Invader humbuckers. Only Halo Fuzz is connected.

TEST RESULTS: As compared to my old BMP, the Halo Fuzz has downright identical smooth fuzz quality but has more headroom, lesser noise interference & a bit more tweakable tone control.

Thanks to Kevin & the AION techies for a better re-design of the famed BMP.

How many BMP variants have you cloned? Build the Halo Fuzz & tell us about it. Thanks for reading!