What's New

New calculators, tools, guides, restoration write-ups, and fixes.

2026-08-29

The five bench apps now install and update properly on iPhone: iOS-only Add to Home Screen steps, and home-screen copies pick up new app versions when you open them.

2026-08-27

Virtual Oscilloscope is now Virtual Oscilloscope Pro: accurate Fender 1–10 knob mapping, and a new Play Dat Noiz control that plays the real modeled amp waveform (distortion, sag, and breakup) through your speaker — matching what the Scope shows.

2026-08-26

New: the “Boring but Useful” page collects quick shop-math tools (Ohm’s Law, dB ratios, fuse rating, and more) plus the searchable tube database in one place.

2026-08-24

Tone Stack Simulator: added a genuine bright-switch circuit for the Twin Reverb AA270.

2026-08-11 to 2026-08-21

Launched the Virtual Oscilloscope, plus two new restoration write-ups: Fender Pro Reverb ‘79–‘80 and Vibrolux Reverb ‘69.

2026-08-07

New restoration write-up: a 1971 Fender Deluxe Reverb bench log with 45 photos.

2026-08-06

Cathode Bypass Cap calculator: added a live, interactive schematic that updates with your values.

2026-08-05

New schematics added to the Signal Tracer & Injector DIY guide.

2026-08-03

Dummy Load Box guide redesigned for a simpler, safer build.

2026-07-29

The Bias Calculator, Tone Stack Simulator, Resistor Toolkit, and Capacitor Toolkit are now installable as apps on your phone.

2026-07-27

Dummy Load and Bias Probes guides expanded with clearer build and measurement notes.

2026-07-26

Launched 14 new bench calculators: resistor and capacitor decoders, Ohm’s Law, dB conversion, and more.

2026-07-23

Launched the Tone Stack Simulator, built on real circuit modeling rather than approximations.

2026-07-22

Launched the Tube Bias Calculator.