Expandotron-ZZ

The original 'boutique' pedal? Maybe. Whatever, this crunch box is capable of some sweet drive.

Famously used by Billy Gibbons (ZZ Top) - it may not get you his tone but it'll point you in the right direction.

The DIP switches of the original have been replaced in the kit by external toggles so you have easy access to all the modes the pedal has to offer - Crunch, Overdrive, Distortion and the whacky Forbidden mode which can be a lot of fun. You could make the switches internal if you can source some 5mm pitch slide switches, but keeping it all outside the box is the order of the day here.

The optocoupler used in the original pedal (PC239) is now obsolete, so we've replaced it with a more easily obtained H11F3. If you can tell the difference you have better ears than ours.

We've included an optional toggle switch for more bass response, which kicks in an extra cap in parallel with the frequency-choking 22n between the first two ICs. Frequencies are still reigned in later in the circuit, so if you go for this option there'll be an alternative value included for the final frequency filtering cap. Note: the effect is very subtle, perhaps even unnoticeable in a lot of situations. There's a lot of circuitry going on after the bigger cap is introduced. If you're looking for major differences, don't bother with this option.

Designed for vertical mount pots (which have round shafts), or you can wire up normal pots if you prefer.

Not a cheap kit, but those LM308s and optocoupler ain't free!


Kit includes: PCB, all components, hook-up wire, 3PDT footswitch for true bypass, jack sockets, DC socket, battery snap, LED. Enclosure (pre-drilled) is optional and will not take a battery. Does not include knobs.

Difficulty: Medium

PCB size: 50 x 50mm

Knobs required: 3

Enclosure: 1590B

Direct-Connect compatible (4-way)


Check Specials for powder-coated enclosure availability.


Download the INSTRUCTION PDF

Expando

Pedal Parts

New

£48.00 inc. tax

£40.00 ex. tax
? Tax based on United Kingdom.

Customer Reviews

1 review(s) posted (write review)
Stuttering fuzz insanity - and a really nice overdrive / distortion 5 product stars
"As a huge ZZ Top fan, I've been after one of these for years. Originals are impossible to find and cost silly money, so when Fuzz Dog released this kit I grabbed on straight away. I'm glad I did. It's a simple build and the new (to me) direct-connect system saves a load of time and makes for a very tidy pedal on the inside. I went with the two-switch version, and added the optional caps for the bass boost with a jumper instead of the switch. The sound is actually a lot better than I expected - I was under the impression this pedal was all about the craziness of the 'forbidden' mode, but it's actually a really usable overdrive / distortion. The three 'unforbidden' switch settings give successive increases in dirt, which combined with the gain knob takes you from mild blues up to a point just short of Metal. It's quite a crunchy sound, more distortion than overdrive, and the pedal is quite bright and in-your-face. I like it, but it's not subtle. Then there's 'forbidden'. Gated, stuttering fuzz madness. Bizarrely, a Telecaster cuts through the mess best, giving a very convincing version of BFG's sound on Rhythmeen. Silly, and immense fun." John Roberts - 04/11/2015

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