Sonic Tight'un Distortion

FET preamp into power amp distortion fun.

There's a lot of gain in this little fella, but it's incredibly tight and focussed, hence the name we've gone for. The FET stage creates remarkably tube-like clipping, giving excellent responsive dynamics. The Power amp takes this deliciously compressed tone and pushes about as hard as it can to create an output your amp will beg for.

We've done a little fiddling with this one to get the best results we can. We've gone for a 2N5457 in the FET stage. Back to back with the original 2N3819 there's no noticeable difference in tone, and the 5457 are more widely available. You can have the 2N3819 if you prefer, but you'll have to do some leg twisting to get it in there. We've opted for the LM386N-3 which gives much better results with note decay than the N-1, and has a more open feel. Much better for pushing your amp.

The original cuts out quite a lot of bottom end (hence the tightness), so we've added an option to increase the value of a couple of caps to thicken it up a bit. We'll supply some sockets if you add this option, which will include six additional caps.

Designed for vertical-pin board-mounted pots (which have round shafts) for minimal wiring and easy enclosure mounting. Feel free to wire up 'normal' pots if you prefer.


Partial kit: PCB, all board-mounted components, pots.

Full kit: As above, plus footswitch and appropriate daughterboard/components for your selected bypass type (see Downloads section for details of those), jack sockets, DC socket, battery snap, hook-up wire, LED.

Enclosure (pre-drilled) is only available with full kits, and will take a battery. Knobs are not included.

Builds are only available with full kits including enclosure and vertical-mount pots. Please choose appropriate knobs.


Difficulty: Easy

PCB size: 50 x 22mm

Knobs required: 3

Enclosure: 1590B

Direct-Connect compatible (4-way)


If you want the kit pre-built you must add the enclosure option below and select your knobs in the Components section. Check Specials for powder-coated enclosure availability.


Download theINSTRUCTION PDF

Tightun

Pedal Parts

81g

New

£27.60 inc. tax

£23.00 ex. tax
? Tax based on United Kingdom.

Customer Reviews

1 review(s) posted (write review)
Excellent Tone 5 product stars
"Very easy to build but with a surprising wide range of tones between the Drive and Vol knobs. Loud is an understatement. Adjusting the bias by ear can give you more drive as well. I recommend you pick the extra caps so you can further customise it for your own taste. I ended up with the 22n ones as I like the chunky sound." MrG - 30/08/2018

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Don't forget to download the appropriate daughterboard build document for your kit:
Standard 3PDT
OptoPuss




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