Ham College 138

12 April 2026 | by George W5JDX  |  Share |   |  Leave a Comment (0)


Ham College episode 138 is now available for download.

Technician Exam Questions Part 25
T9A – Antennas: vertical and horizontal polarization, concept of antenna gain, definition and types of beam antennas, antenna loading, common portable and mobile antennas, relationships between resonant length and frequency, and dipole pattern.
T9B – Feed lines: types, attenuation vs frequency, selecting. SWR concepts, Antenna tuners (couplers), RF Connector selecting and weather protection.

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George Thomas, W5JDX, is co-host of AmateurLogic.TV, an original amateur radio video program hosted by George Thomas (W5JDX), Tommy Martin (N5ZNO), Peter Berrett (VK3PB), and Emile Diodene (KE5QKR). Contact him at [email protected].

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