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  • Guitar and Audio
    • Amplifiers
      • My first valve amp
      • An excursion into Hi Fi
      • The second guitar amp
      • The first guitar amp reimagined
      • The Jack Wilkinson Special
      • Excursions into solid-state
        • The Helix 2 50W Mosfet module
        • Classic Class A PCBs
        • The Helix 6 50W HiFi Monoblock
      • The M2 Attenuator
    • Pedals
      • The Vortex Drive – a take on the Secret Freq and Pearl OD5
      • The Infinite Improbability Drive
      • The Heart of Gold
      • Mostly Harmless
      • The Local Planning Office
      • Disaster Area
      • The Gargleblaster
      • Base 13
      • The Beast of Traal
      • The Paranoid Android
      • Deep Thought
      • Mostly Harmless
      • Vroomfondel
      • Agrajag
      • Majikthise
      • Eccentrica Gallumbits
      • Milliways
      • Pedal Power
    • Software
      • Tonestack Calculator
      • Valve Workbench
      • Valve Designer
    • Test equipment
      • Valve Analyser
        • A revision to the hardware
      • Power Transformer Tester
      • Output Transformer Tester
      • Signal Generator
    • Valve modelling
      • Ayumi’s Tube Models
      • Franz Tank
  • Cooking, eating and drinking
    • Roasting
      • Roast Pork
      • Roast Beef and Lamb
      • Roast Poultry
      • Gravy and Stock
    • Braising
    • Deep fat frying
      • Chips
      • Chicken Goujons
    • The BBQ
    • Sauces
      • Italian sauces
        • Marinara sauce
        • Arrabiata sauce
        • Amatriciana sauce
        • Puttanesca Sauce
      • Romesco sauce
      • Piri Piri sauce
    • Pastes, rubs and spice blends
      • Harissa paste
      • Thai Green Curry paste
      • Niter Kibbeh
      • Jerk chicken marinade
      • Preserved Lemons
    • Recipes
  • IT & Architecture
    • Data modelling
      • Data Modelling in UML
        • 1. Introduction
        • 2. LDML basics
        • 3. Generalization, inheritance and Interfaces
        • 4. Managing Reference Data
        • 5. Domain-centric modelling
      • Palladium – an open source tool for LDML
      • The Unified Logical Data Model
      • Data Modelling, Data Fabric and Data Mesh
      • Modelling collaboratively
    • A new approach to defining a JSON schema
      • JSD design principles
      • Building the JSD document structure
      • Enabling reuse of JSD schema elements
      • Conditional schema with polymorphism
      • JSD Reference
        • Document level properties
        • The type-specifier class
          • Strings
          • Numbers
          • Booleans
          • Arrays
          • Objects
      • jsd-schema.jsd
    • Reflections and experiences
      • The importance of Conway’s Law
      • Change
      • Management insanity
      • The mythology of the Business Case
      • The tyranny of capitalising IT
  • Restoration projects
    • Antique sewing table restoration
    • Isaiah Deck thermometer
  • Making
    • The laser cutter
      • The laser cutter bed
      • Fitting the drag chains
      • Adding USB over WiFi
      • Improving the Z axis
    • The walnut guitar of destiny
    • A reflow soldering plate
    • Vacuum veneering
  • History
    • André-Marie Ampère
    • The Smiths
    • Thomas Richard Underwood
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Featured in: Vortex Drive – a take on the Secret Freq and Pearl OD5. Full size image: 1000 × 387.

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