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Useful links

Electronics

changpuak.ch: Antenna and filter calculators

classeradio.com: Class E AM Transmitter Descriptions, Circuits, Etc.

VK1SV: Class-E for beginners

dmitrynizh.com: Create Spice Models for tubes

b-kainka.de: Electronic projects

funknetzplanung.com: RF-Calculator

VK5DJ: Yagi Calculator (I used it for calculating 13cm and 70cm Band Yagis, works well)

Smith Chart Calculator

DG0SA: Calculate a Collins Filter for impedance matching

Radio & Ham Radio

radiomuseum.org: Radio schematics

radio-workshop.co.uk: Ray's radio workshop (interesting podcasts)

channel292: German Short Wave station

Radio Merlin: UK Short Wave pirate station

Laser Hot Hits: UK Short Wave pirate station

radiosondy.info: Radiosonde tracking

cb-funk.at: CB-Radio Austria Forum

hamnetdb.net: Useful map for designing PTP radio links

dxmaps.com: Sporadic-E Maps

HB9EYZ: Locator Map, good for distance calculation

Radio Stehwelle: Short radio program on CB, Paket Radio Node

Mechanical Engineering

Free Gear Generator

Programming

freeicons.io: Free Icons (also used on egimoto)

last edited 2 days ago