Software

QUCS for Filter Design

Introduction QUCS, or Quite Universal Circuit Simulator, is a freeware utility that allows you to draw circuit schematics, and perform AC & DC simulation, noise simulation (for S-parameters, and AC simulations), S-parameter simulation, and a whole lot more upon them. I first tried QUCS about a ten years ago, and for whatever reason (lack of […]

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The main RFSim99 display, showing a multi-pole low pass filter.

Free RF simulation software

I’ve been using RF sim 99 (aka RFSim99) for over a decade, and it’s proved invaluable again and again during that time, and continues to do so. RFSim99 is a freeware RF simulation software utility. It’s small, fast, and reliable. I should make it clear that it performs basic RF simulation only, and is nothing like Genesys/ADS, […]

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FTRestore

The other evening, I decided it’d be a good idea to update my FT-991 with the latest firmware. Aside from this being a good idea generally, to keep up with the latest and greatest improvements to the FT-991, I’m a hopeless early adopter, and I like to try new things. I wonder when they’re going […]

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