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  • End Fed Half Wave matching transformer – 80-20m – model and measurement 23/05/2022
  • Sontheimer coupler – transformer issues – an alternative design – FT23-43 21/05/2022
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  • ESP WiFi relay project – update #1 16/05/2022
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  • NanoVNA-H4 – inductor challenge – part 7 08/05/2022
  • FNIRSI FNB48 USB meter – cable resistance measurement 07/05/2022
  • NanoVNA – measuring Q of an inductor using s21 – fails? 03/05/2022
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  • NanoVNA – Port 1 port extension 30/04/2022
  • NanoVNA – DiSlord NanoVNA-D v1.1.00 & NanoVNA-App-v1.1.209-OD10 calibration 26/04/2022
  • Calculator – solve parallel resonance 21/04/2022
  • NanoVNA – trying the DiSlord built in cable length measurement feature 21/04/2022
  • Ferrite cored RF chokes in Class-E RF power amplifiers – core material issues 19/04/2022
  • NanoVNA phase confusion 17/04/2022
  • NanoVNA-H4 – inductor challenge – part 6 16/04/2022
  • Ferrite cored RF chokes in Class-E RF power amplifiers 15/04/2022
  • Chinese attenuator board review 10/04/2022
  • NanoVNA-H4 – inductor challenge – part 5 10/04/2022
  • NanoVNA-H4 – inductor challenge – part 4 09/04/2022
  • NanoVNA-H4 – inductor challenge – part 3 08/04/2022
  • NanoVNA-H4 – inductor challenge – part 2 07/04/2022
  • NanoVNA-H4 – inductor challenge -part 1 06/04/2022
  • NanoVNA-App – driver for NanoVNA firmware updates 03/04/2022
  • InsertionVSWR of Chinese 1:9 balun module #3 – correcting Z using e-delay 30/03/2022
  • ESP WiFi relay project – preview 23/03/2022
  • InsertionVSWR of Chinese 1:9 balun module #2 21/03/2022
  • ESP8266 relay module review – Yunshan WiFi relay – a new life 20/03/2022
  • NanoVNA-H – hardware issues 17/03/2022
  • A 1:4 RF transformer for measurements – based on Noelec 1:9 balun assembly 12/03/2022
  • NanoVNA-H4 v4.3 – broken SMA connector 12/03/2022
  • NanoVNA-H4 v4.3 – improving the SD card slot 11/03/2022
  • Transformers and flux density 10/03/2022
  • Selfevidently 09/03/2022
  • On testing two wire line loss with an analyser / VNA – part 6 07/03/2022
  • 4NEC2 plots of STL VSWR II (v5.9.3) 06/03/2022
  • InsertionVSWR of Chinese 1-9 balun module – that load resistor 04/03/2022
  • InsertionVSWR of Chinese 1-9 balun module 03/03/2022
  • On testing two wire line loss with an analyser / VNA – part 5 27/02/2022
  • The Smith chart, a thing of beauty… and great utility #2 26/02/2022
  • NanoVNA-H4 – a ferrite cored test inductor impedance measurement – s11 reflection vs s21 series vs s21 pi 23/02/2022
  • The Smith chart, a thing of beauty… and great utility 20/02/2022
  • Loop in ground (LiG) for rx only on low HF – #11 three terminal equivalent Z 19/02/2022
  • On testing two wire line loss with an analyser / VNA – part 4 18/02/2022
  • The oft asked question of how much an LNA improves a 70cm weak signal station – Rules of Thumb 15/02/2022

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Calculator – solve parallel resonance

I have tidied up and published a calculator I wrote quite some years ago to solve lossy parallel resonance problems.

  • Solve parallel resonant network
Last update: 21st April, 2022, 11:33 AM
Posted on 21/04/202221/04/2022Author OwenCategories Amateur Radio, Electronics

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