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    • Modular Synth VCO Design & Build - Duration: 14 minutes.

      • 1 year ago
      In this video I build a voltage controlled oscillator (sawtooth core). It's inspired by the early Elektor Formant synths, and designed to integrate with existing Eurorack synthesizer systems.

    • LCD Upgrade for the HP 141T Spectrum Analyzer [Part 1] - Duration: 15 minutes.

      • 1 year ago
      In this video I demonstrate my progress so far on building an intelligent LCD display upgrade for the HP 141T.
      I use an STM32F746G discovery board with a 4" touchscreen, and demonstrate a few neat ...
    • Rapid Prototyping RF Filters with Tape & QUCS - Duration: 21 minutes.

      • 1 year ago
      A guide to simulating microstrip filters in QUCS and prototyping them with copper tape on blank FR4 sheets. These super-cheap materials are good up to a couple gigahertz, as you'll see in the video...
    • 14GHz Mixer Build & Experiments - Duration: 14 minutes.

      • 1 year ago
      Building a mixer based on the LTC5548 14GHz MMIC by LT, and a TCM1-83X+ by Mini-Circuits [plus bonus bodge wires ;)]
      After measuring LO leakage, conversion loss and IIP3 at different frequencies, I...
    • Vintage Crystal Oscillator Teardown & Experiments - Duration: 10 minutes.

      • 1 year ago
      Taking apart an old NDK 48MHz ovenized crystal oscillator from the 80s, making some measurements; and taking macro shots of the quartz.
      I make some initial frequency measurements before taking it a...
    • Dumpster DC Lab Power Supply Repair - Duration: 15 minutes.

      • 1 year ago
      I repair an old APLAB ZD3203 DC Lab Power Supply that I rescued from the dumpster.
      It had 2 big issues, one with extremely dodgy pots and another with output transients when turning it off.

    • JDS6600 Function Generator Review & Teardown - Duration: 16 minutes.

      • 1 year ago
      I take a detailed look at a cheap $100 function generator that came out recently, from JunCe Instruments.
      Measuring amplitudes, checking harmonic distortion, making some funky waveforms, and seeing...
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