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  • Prototype 2el Yagi for 146MHz Fox Hunting – measurement 12/12/2024
  • Toro MX4250 rear tyre mid life maintenance 11/12/2024
  • “CM choke acts like the cut-off end of a wire antenna?” 07/12/2024
  • Prototype 2el Yagi for 401MHz (Radiosonde) Fox Hunting 02/12/2024
  • Prototype 2el Yagi for 146MHz Fox Hunting 30/11/2024
  • Common mode current and RF feed lines – an interesting thought exercise from WA7ARK 24/11/2024
  • NanoVNA-H4 – inductor challenge – part 8 23/11/2024
  • Common mode current and RF feed lines 20/11/2024
  • Preliminary design of digital display for RF current probe – revised 17/11/2024
  • LED plate driver failure #3 & 4 – 24W round plate 17/11/2024
  • The Mansfield strainer knot for fence wire 15/11/2024
  • Measuring RF feed line common mode current – relative or absolute measurement? 13/11/2024
  • NanoVNA: where exactly are Port 1 and Port 2? 11/11/2024
  • Flashover and the popular ~132′ dipole with two wire line feed and longer feed line 09/11/2024
  • Flashover and the popular ~132′ dipole with two wire line feed 08/11/2024
  • Is it possible to predict the terminal voltage of an installed antenna with feed line? 07/11/2024
  • If baluns bug you… 06/11/2024
  • MJF-986 ATU – flashover analysis – is the underlying problem not the ATU? 06/11/2024
  • MJF-986 ATU – flashover analysis – comparison with 500pF T match 06/11/2024
  • MJF-986 ATU – flashover analysis 05/11/2024
  • Uni-T UTi260B handheld thermal camera problem 04/11/2024
  • Crystal substitute using si5351 – part 4 03/11/2024
  • Toro MX4250 deck idler maintenance 30/10/2024
  • Undoing those dreaded SMA(F)-SMA(F) adapters 29/10/2024
  • Coax connectors and accurate / repeatable measurements – Keysight’s advice 28/10/2024
  • NanoVNA-saver v0.6.4 sometimes writes invalid Touchstone file 26/10/2024
  • FSC v1.16 – update to help file. 18/10/2024
  • Insertion Loss does not imply any specific conversion of energy to heat – measurement of the example 15/10/2024
  • Insertion Loss does not imply any specific conversion of energy to heat 14/10/2024
  • Microsemi AN1819: A 700W Broadband Amplifier Using VRF2944 10/10/2024
  • Eico 723 reverse engineering 07/10/2024
  • EFHW compensation, or those little blue capacitors 07/10/2024
  • Toro MX4250 spindle maintenance 06/10/2024
  • Transformers and magnetic saturation 05/10/2024
  • ARRL EFHW (hfkits.com) antenna kit transformer – revised design #1 – part 2 03/10/2024
  • Currents at a coax to dipole junction 01/10/2024
  • Fact check: “For an antenna, if it doesn’t resonate, it really doesn’t radiate!” 01/10/2024
  • nanoVNA – are you fazed by phase? 26/09/2024
  • A low Insertion VSWR high Zcm Guanella 1:1 balun for HF – coax bend radius 19/09/2024
  • Return Loss Bridge – Dunsmore’s bridge 17/09/2024
  • ARRL EFHW (hfkits.com) antenna kit transformer – revised design #1 – part 1 15/09/2024
  • Jaycar L15 ferrite (LO1238) 10/09/2024
  • Probing the popular s21 series through impedance measurement using NanoVNA-D v1.2.29 cf NanoVNA-D v1.2.40 07/09/2024
  • Fox flasher MkII update 9/2024 06/09/2024
  • ARRL EFHW (hfkits.com) antenna kit transformer – measurement 06/09/2024
  • DIY UHF short and open circuit terminations 04/09/2024
  • Probing the popular s21 series through impedance measurement using NanoVNA-D v1.2.29 02/09/2024
  • Jupyter: one for the toolbox – decompose common mode and differential mode current components 31/08/2024
  • A simple NanoVNA test of a ferrite core and winding to check its suitability in a 50Ω:xΩ transformer 26/08/2024
  • Thoughts on the ARRL EFHW antenna kit transformer – improvements? 24/08/2024

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Last update: 19th September, 2015, 7:54 AM
Posted on 25/12/201319/09/2015Author OwenCategories Admin

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