Akashic Guitar effects circuit lookup
DRIVETONEVOLUME

Enclosure not stated · 3 knobs

Tagboard Effects

Skrydstrup R&D Overdrive ODR-2Verified

Based on the Skrydstrup R&D Overdrive ODR-2

Category
Distortion
Controls
Drive · Tone · Volume
Build
Vero· 16×16· 20 cuts, 7 links
Layout
Verified · Tagboard Effects marks it as built and working
Tags
Distortion, Overdrive

From the post

May as well add this one too :o) The layout actually ended up looking quite different but this is very obviously a Cornish SS-2 clone, at a similar sort of price. There are some differences which I expect will make them noticeably different, so this is probably still worth building even if you build the SS-2 as well, but I certainly wouldn't expect them to be worlds apart in tone. It would be nice to critically compare the two though.

The same applies as with the SS-2, this is designed with true bypass switching in mind, but if you do want to build it with the buffered bypass, then make a daughterboard of the Cornish Buffer. The input socket connects directly to the input of the bypass buffer. The output of the bypass buffer then goes to ODR-2 input and daisy chains to the 3PDT stomp switch, lugs 1 and 4. The output of the ODR-2 will go to 3PDT lugs 3 and 6, and the output socket connects to 3PDT lugs 2 and 5.

The third pole of the 3PDT is used for LED switching as usual.

Info about the original Cornish copy:

Skrydstrup R&D Overdrive ODR-2

The ODR2 is a smooth, dynamic overdrive unit designed to emulate the overdrive sounds of our highly recognized OD50 Tube Amplifier.

This unit is perfect for overdrive tones ranging from a semi-cranked AC30 to the sound of Hendrix.

The TONE control is not a traditional tone control, but a High Frequency Damping control. Turned all the way up the TONE control is not active.

Schematic

This is a board layout, a drawing of where each part goes, and the post may link the schematic it was drawn from. Open the layout at Tagboard Effects. No KiCad fragment has been drawn for this circuit yet.

Parts list 24 rows

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Check before you build · 2 values the reader of this layout was not sure of
  • 91R lower right of the board: printed clearly, unusual value
  • 2K4 next to it: printed clearly, unusual value
RefValueNormalizedTypeNotes
Resistors 9
×51M1Mread from the layout by eye
×410K10kread from the layout by eye
×2150K150kread from the layout by eye
×1510R510read from the layout by eye
×1100R100read from the layout by eye
×1180K180kread from the layout by eye
×12K42.4kread from the layout by eye
×191R91read from the layout by eye
×16K86.8kread from the layout by eye
Capacitors 9
×410n10nread from the layout by eye
×14n74.7nread from the layout by eye
×1470n470nread from the layout by eye
×11n51.5nread from the layout by eye
×1220n220nread from the layout by eye
×11u1udrawn as a film cap; read from the layout by eye
×210u10uelectrolytic; read from the layout by eye
×1220u220uelectrolytic; read from the layout by eye
×122u22uelectrolytic; read from the layout by eye
Diodes 2
D1AA117AA117germanium; read from the layout by eye
D2AA117AA117germanium; read from the layout by eye
ICs 1
×2LM741LM741read from the layout by eye
Potentiometers 3
DriveC50KC50kPotentiometerRev Log; wires labelled Sustain; read from the layout by eye
ToneB25KB25kPotentiometerread from the layout by eye
VolumeA100KA100kPotentiometerread from the layout by eye