TRANSISTORS: Germanium Transistor Equivalents or Comparable Tables

It’s worth noting that none of the source material claims that equivalent equates to identical – there will be differences, it will largely come down to what you are trying to build in a lot of cases. I’ve only listed transistors commonly sought after for guitar pedals, as this is what I’m usually trying to … Read more

TRANSISTORS, CV Designations – UK Military Specification for Germanium Transistors

CV Transistors are UK military spec valves, transistors and diodes (CV stands for common valve, as it predates semiconductors).  CV transistors were made by several different manufacturers on contract and produced to the UK military’s specifications.  These can be, and quite often are, common commercial transistors made to military specification and renumbered. Here are a few pedal-friendly transistors … Read more

Tone Bender MKI Enclosure From Sunetec on eBay

9239E5A1 E220 4BA8 B4B7 8F511530E228 5d8a43b34b6b

These are now available from sunetec_au on ebay.  I previously purchased a couple of wedge enclosures from them, and they are really well-made.  It’s the right size, and it’s made from decent steel. Shipping was free and fast from Hong Kong.  It has rubber feet instead of pressed metal bumps – think I prefer rubber … Read more

OFF-BOARD WIRING: Tone Bender MKIII

TONE BENDER off board wiring layout V1a 64e499052021

Off-board wiring for any Tone Bender MKIII or MKIV – this is just how I do it; it’s not exactly vintage correct.   The cable with a grey offshoot is shielded.  Note where shields are not connected. I’ve grounded the enclosure via a pot; this is only sometimes necessary or recommended, depending on the style … 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