REVOX: A77 Input Amplifier Clean Boost, Overdrive / Light Fuzz

REVOX A77 61f0fa4ffd0e

This is the input amplifier from a Revox A77 reel to reel (circa ~ 1967) – which also happens to be almost identical to the mic preamp in Trident A-Range mixing consoles from the early seventies. So far out of the preamps that I’ve been working on, which is the Neve, RCA and this, I’m … Read more

MARSHALL: SupaFuzz Prototype, 0.15″ Vero Layout

MARSHALL Supa Fuzz prototype vero layout 25231cda54d4

This is the early version of the Marshall SupaFuzz based on a Tone Bender MKI – it’s close to the original layout used.   Strangely it never had a coupling cap on the output, so best to add something decent sized there.  I’ve also seen a couple of photos with a power cap across V+ … Read more

DALLAS: Rangemaster, Tag Board Layout

Dallas Rangemaster tag board layout v1a fb8ca688d581

A bit of a classic – well one of the first guitar effects really, the Dallas Rangemaster.  A nice simple one for a quick build using leftover tag board.    In theory there is room to fit the output cap on the board too, but I liked the straight lines of the components.   DALLAS RANGEMASTER TREBLE … Read more

Soviet Colour Codes for Germanium Diodes

Russian diode chart 2196da67ecf6

Looking for some affordable germanium diodes?  It’s hard not to go past the price, quality and availability of the old soviet stock.  They can behave a little differently than their European and American friends, but otherwise, they are well worth a look as an affordable substitute. BEST 1N341 / 1N34A SUBSTITUTES USING SOVIET-ERA DIODES Д9Б … Read more

D*A*M: Red Rooster Booster, Tag Board Layout

DAM Red Rooster Booster tag board layout 2fe703e6d468

While I was thinking of what could be made with tag board off-cuts, this popped into my head.  The D*A*M Red Rooster Booster is probably my all-time favourite booster – I’ve only ever made one, and it was so good I stopped there (it was a point-to-point npn version with trimmer). This is a PNP … Read more

ARBITER: Fuzz Face, Tag Board Layout

Arbiter Fuzz Face tag board v1a 1e7b488128bf

I typically buy tag board strips with 18 lugs, usually leaving 6 left over after a few of my recent builds.  So, what to do with a small board?  Fuzz Face…   has to be one of the all-time classics of guitar effects. ARBITER FUZZ FACE – TAG BOARD LAYOUT – PNP GERMANIUM ARBITER FUZZ … Read more

SOLA SOUND: Tone Bender MKI, Tag Board Layouts

SOLA SOUND Tone Bender MKI tag board layout v1a 63262d866a80

I’m sure there are more than a few layouts out there for the Tone Bender MKI on tag board – I’m sure a couple more will not hurt.   These are based on the Zonk Machine tag board layout, and I’m planning on adding an extra tag or two to adapt it to a D*A*M FZ-673 and … Read more