VK3EDW

Ham Radio & Technical Tips

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Another image from Meteor M N2-2

Quad Helix antenna

RTL-SDR RX

SDR# & Orbitron

ATOM - Fantastic text editor
Coil 32 - freeware software for coil design calculations
ELSIE - The Windows program for electrical filter design and analysis
Extreme narrow bandwidth techniques - by ON7YD
Here KA7OEI has provided a great write up on the principles of QRSS and links to software to decode QRSS
Mini ring core calculator - a great coil calculator written by DL5SWB
Minikits - An Australian componet supplier that specialises in RF and hard to get components, highly recommended
NT7S Arduino Library A very good Arduino library for the SI5351 sig gen.
Tonne Software - An uncommon catalog of original and interesting electrical-engineering programs
WA4DSY's onlie calculator. An online calculator for bandpass and lowpass filters
WSJT-X - web site for WSJT-X with good instructions
WSPR-net - The Weak Signal Propagation Reporter Network is a group of amateur radio operators using K1JT's MEPT_JT digital mode to probe radio frequency propagation conditions using very low power (QRP/QRPp) transmissions. The software is open source, and the data collected are available to the public through this site.

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