In this video, I take apart a popular open-source Z-Match antenna tuner and explain exactly how it works — and why it’s different from Pi-network and T-network tuners.
We crack it open, look at the transformer-coupled coils, the dual variable capacitors, the impedance switch, and even the mysterious resistor load inside. Then we put it on the air and tune a 9 foot 4" antenna on 80m and 17m using both noise-tuning and carrier-based tuning methods.
You’ll also see how the “tune mode” works, why those 68-ohm resistors aren’t a 50-ohm dummy load, and how to use the Z-Match safely at QRP power levels.
Today’s Station:
👉 Z-Match tuner: https://geni.us/1ompX1
👉 CebaRobot Github Project: https://github.com/cebarobot/Z-match-Tuner
👉 Icom IC-705 QRP transceiver: https://geni.us/ZNwMU0L
👉 ABR Coax w/choke: https://geni.us/AnDVyG
👉 9’4” Chameleon military whip: https://chameleonantenna.com/products/cha-mil-whip-2-0?bg_ref=fD7LlhdOTV
👉 Screwdriver Set: https://geni.us/OilK
👉 Check the premium Geekom Mini Computers: https://geni.us/y8uCVl
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Perfect for portable QRP, SOTA, POTA, RV operation, or anyone wanting to understand how transformer-coupled manual tuners actually work.
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