PA0FRI Unbalanced/Balanced ATU Project

By F5NPV

The PA0FRI Unbalanced/Balanced ATU is a home-built antenna tuner designed to efficiently match a W8JK 2-element beam antenna fed with a 450-ohm twin lead. Based on PA0FRI’s S-Match design, it optimizes energy transfer while maintaining balance, reducing losses, and ensuring proper radiation. The tuner uses a roller inductor, air variable capacitors, and a T200 iron powder coil, allowing fine-tuning across 14-50 MHz. Extensive lab tests confirm minimal attenuation and precise impedance matching, making it a reliable and efficient ATU for balanced antennas.

Hits: 78 | Votes: 1 | Rating: 10.00

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Antennas/Tuners

The title of the main category is Tuners and it deals mainly with Homebrewing antenna tuners. The link to this resource has been on our site since Thursday Feb 20 2025, and it has been followed 78 times. So far it received 1 votes for a total score of 10.00/10
Last updated: 2025-08-08

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