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SESK: Stuff Everyone Should Know · sesk.info/ham-type-n-connector

Which connector type is most suitable for RF frequencies above 400 MHz?

Type N.

  1. Type N ✔
  2. PL-259
  3. DB-25

Why: Type N connectors keep a steady 50-ohm impedance and hold up well at UHF and microwave frequencies. PL-259 connectors are mostly used at HF and VHF.

Huh, didn't know that: Outdoor connectors, Type N included, should be carefully taped for weather protection.

The dad joke
Why did the PL-259 get nervous above 400 MHz? It knew Type N was the real connection.
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Sources

  1. NCVEC 2026-2030 Technician Question Pool (Feb 19, 2026 release) https://www.ncvec.org/downloads/2026-2030%20Technician%20Pool%20and%20Syllabus%20Public%20Release%20Feb%2019%202026.pdf

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