How-Tos

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Measuring Ferrite Beads and Toroids - Distribution.pdf

The is the slide deck from W7YP's presentation given at the May 19, 2026 Flathead Valley Amateur Radio Club meeting.

Topics covered include building a test station, choice of VNAs, configuring and calibrating the VNA, test fixtures, and measuring ferrite beads and toroids.

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Ferrite Beads and Toroids in Amateur Radio.pdf

How to use ferrite beads and toroids to suppress common mode currents and other noise in coax and cables. Covers symptoms of such unwanted currents, choosing the right mix type and proper placement.

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Building a Slim Jim Antenna for 2m with BONUS SLIDES .pdf

Explains what the Slim Jim antenna is, the physics behind it, how it compares to the J-pole and how to build one.

By W7YP

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What is VarAC and the VARA Software Suite - Released.pdf

Slides used in the January 20, 2026 FVARC club meeting presentation by W7YP.

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APRS Presentation by W7YP - Distribution Copy .pdf

This file contains the slides used at the club's November 18,2025 meeting. The presentation shows that APRS is FAR more than just location reporting, and discusses how to use APRS and its many services.

Topics covered:

- What is the APRS system?
- What is the purpose of APRS?
- How APRS works
- Why use APRS?
- What you need to use APRS
- Other APRS software and services

File: 

Baluns, Ununs and Chokes _W7YP_Released.pdf

Covers baluns, both current and voltage types, as well as ununs. How they work and which is best for each application.

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WebSDR Released Copy.pdf

What is WebSDR, what can it do and who can use it?

Presentation given at the February 18 2025 club meeting, by W7YP.

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AllStarLink on Your Smartphone - Release Version.pdf

Review of the very popular AllStarLink global network of interconnected repeaters and how to connect to it using your smartphone.

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Testing Components - 10-15-24 Presentation.pdf

Key notes from W7EFL's presentation at the club's October 15, 2024 club meeting.

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Radio Direction Finding PDF Version.pdf

This file is the PDF version of the PowerPoint slides used in W7YP's presentation on Radio Direction Finding, given at the September 17, 2024 club meeting.

The presentation goes into detail on the automated RDF system by KrakenRF.