Engineer´s Thumb - Compressor kit

Item number: 2084

Fantastic Compressor

Category: Modulation, Dynamic


starting from 28,00 €

Final price incl. VAT, plus shipping (mitttel)

Available now!

Shipping time: 3-7 Working days


The Engineer´s Thumb Compressor is designed by Merlin Blencowe (The Valve Wizard Website.

It features controls for Attack, Ratio, Threshold, Release and Level and works with a LM13700 IC, functional equal to the CA3080, which is also used in the Dynacomp.

This kit contains all parts you need to build a fully functional effect pedal.

Not included in the kit, but also very good to have:

  • Aluminium enclosure: select one above
  • DC power supply
  • 5 nice knobs for the pots, for 6,3mm shaft
  • Decal, transfer or transparent sheets for labeling

Here is the project page:
Engineers Thumb on The Valve Wizard

Instrument: Guitar
Effect-Type: Compressor

Build documents

Installation guide: Installation guide

Schematic and pcb: Schematic

Parts list (BOM): Parts list

Ratings (34)

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The most useful review

1 from 1 Customers found the following product review helpful
5 from 5 Fantastic Compressor

The best compressor Ive tried for electric guitar - smooth, silky compression that can be dialled up to high ratios with low noise. I installed a 300k lin pot for the release value resistor. At low settings it will distort in a very pleasureable way. I use this compressor for guitars, drum machines, basses etc and Im extremely happy about how it performs and sounds. Highly recommended!

., 28.11.2017
Entries 1 – 10 of 19
5 from 5 Un excellent compresseur

Au milieu de la cohorte de clones Dyna ou Ross, voire les deux, ce compresseur fait merveille. Pas de coloration abusive, le son de la guitare est respecté, les réglages sont fins soit pour donner une discrète et efficace compression soit pour aller dans du plus moderne, qui passe au dessus du mix. Pas de souffle, utilisée pour ma part en tout début de chaine.
Le kit est simple à réaliser, fort bien pensé en terme dergonomie, un très bon rapport qualité/prix.

., 25.06.2018
5 from 5 Great compressor!

I had a lot of fun building this kit! Ik sounds great and I love the versatility. 5 knobs to controll the sounds to your likings is what I dreamed about.
Thanks for this great kit!

., 02.10.2018
5 from 5 Google kit & good compressor!

Its my first Das Musikding kit. I wanted to try this compressor with 5 pots and I am satisfied both with the kit, which is easy to make, and with the sound that is brilliant and without background noise.

., 14.10.2018
3 from 5 Easy build, OK compressor

The build was pretty straightforward, and the end result is an OK compressor - no better than the premium brand pedals I have had, but no worse either.

I find the taper on the pots to be odd - only at the end of the taper do I seem to get a change in characteristic. Probably a one-off pot issue.

., 10.12.2018
5 from 5 super compresseur

Super compresseur, silencieux et efficace.
Comme dhabitude le PCB et les pièces sont dexcellente qualité et la doc suffisamment détaillée pour un constructeur averti.
A moi le son précis qui passe au dessus du mix.
Merci Musikding

., 31.12.2018
5 from 5 Wonderfull Compressor

I have used a number of compressors, cheap and boutique, but I think this is the best. Easy to adjust, great sound and no noise.

., 18.02.2019
5 from 5 Cool compressor

Very nice kit: the result is a very well built (and sounding!) stompbox.
I suggest to buy the pre-drilled enclosure (in this way it is possible to put the pot directly on the pcb).
Another suggestion is to buy small knobs because the pot are vey near: i bought 5 Fluted knob 15mm greens and they are perfect!

., 03.06.2019
5 from 5 Un excelent compresseur

Un excelent compresseur qui respecte parfaitement le signal. Il sait se faire oublier en ne colorant pas trop le son.
Le kit est très très bien fait, les valeurs des composants annotées : un montage hyper propre, facile à faire.
Bravo !

., 19.07.2019
5 from 5 Nice kit!

This is a great kit, and the pcb is very high quality. I love the layout and how its using a TL074 instead of two TL072. Im using it for bass guitar and it sounds awesome, no mods needed. Nice, full and punchy sound. I prefer this one over MXR M87, and it might even knock my Aguilar TLC off the board.

., 07.08.2019
5 from 5 Excellent compresseur

Après deux montages DIY non satisfaisants, jai trouvé la perle : ce kit Engineers Thumb.

Tous les réglages sont possibles. Depuis une légère compression à peine audible jusquà une grosse compression.
Cette pédale est très transparente, elle modifie à peine le son de votre instrument.

., 13.07.2020
Entries 1 – 10 of 19

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