Dirtbox Layouts: March 2020

Tuesday 31 March 2020

J Rockett Hightop Boost

The 2N708's isn't that common but any low gain NPN silicon should work like 2N2369 or 2N1613. Try hfe in the 50-100 ballpark.

Monday 30 March 2020

Seymour Duncan Pickup Booster

As you can see there is lots of odd resistor values so here is a layout with closest more common values.

Sunday 29 March 2020

Fancy Lime Gorn Overdrive.

A good sounding low gain/medium gain overdrive (depending on pickups used) with a interesting diode clipping setup and a useful "Woody/Tinny" switch. More info and schematic HERE.

Friday 27 March 2020

Thursday 26 March 2020

Tuesday 24 March 2020

Monday 23 March 2020

Sunday 22 March 2020

Wednesday 18 March 2020

Earthquaker Devices Black Ash Endangered Fuzz

Traced by cenotapf and AlexS. It's basically a silicon Tonbender Mk 2 with a quite subtle treble cut control. 2N3903 transistor is a low gain version of 2N3904 so any NPN silicon with Hfe 100-150 works like MPSA06, PN22222, 2N2369 etc.

Verified by AlexS

Tuesday 17 March 2020

Dunlop Fuzz Face

Requested and verified by Teddeeh

Monday 16 March 2020

Fuzzhead Fx Soundwave War

Just a variation of various Death by Audio circuits using reverse beta gain (reversed transistor gain). Initially I was messing with Fuzz War 7 transistor fuzz and eventually got it to work but it was unstable and the decay was very erratic.

Replaced the five first stages with the four first stages of Soundwave Breakdown since it's much more stable. Added a small 470pF cap across emitter and base to tame oscillation. Tonestack is big muff style with tweaked values with a treble bleed cap parallel with the tone control to the two revovery stages. Germanium hard clippers is russian D311 with quite low voltage drop (0,2v). And I found that MPSA18 worked much better than 2N5089 which sounds much bigger and has more sustain and pleasant decay.

And yes, it does doom.

Verified