![]() ![]() Tips and techniques for measuring small RF inductors and transformers.On ferrite cored RF broadband transformers and leakage inductance.Measuring the gain of an antenna by the three antenna method.The oft asked question of how much an LNA improves a 70cm weak signal station.The oft asked question of how much an LNA improves a 70cm weak signal station – Rules of Thumb. ![]() On testing two wire line loss with an analyser / VNA – part 4.Loop in ground (LiG) for rx only on low HF – #11 three terminal equivalent Z.The Smith chart, a thing of beauty… and great utility.NanoVNA-H4 – a ferrite cored test inductor impedance measurement – s11 reflection vs s21 series vs s21 pi.The Smith chart, a thing of beauty… and great utility #2.On testing two wire line loss with an analyser / VNA – part 5.InsertionVSWR of Chinese 1-9 balun module.InsertionVSWR of Chinese 1-9 balun module – that load resistor.On testing two wire line loss with an analyser / VNA – part 6.NanoVNA-H4 v4.3 – improving the SD card slot.NanoVNA-H4 v4.3 – broken SMA connector.A 1:4 RF transformer for measurements – based on Noelec 1:9 balun assembly. ![]()
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