Skip to content

owenduffy.net

Mostly electronics…

Search

Recent Posts

  • Another small efficient matching transformer for an EFHW – 2643251002 – #4 – a paired Guanella 1:1 balun 27/05/2022
  • Center-Fed Dipole : elements length for a Z=200 +/- 0j ohms 25/05/2022
  • Another small efficient matching transformer for an EFHW – 2643251002 – #3 – thermal measurement 24/05/2022
  • Sontheimer coupler – transformer issues – an alternative design – FT37-43 24/05/2022
  • 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
  • Measuring modulation index of an amplitude modulated wave with an oscilloscope 19/05/2022
  • U.FL connectors – hints 18/05/2022
  • The need for infinite preamplifier gain? 16/05/2022
  • ESP WiFi relay project – update #1 16/05/2022
  • WriteOptiBoot.bat 15/05/2022
  • USBasp – hints 15/05/2022
  • ICSP programming of the (tr)uSDX 14/05/2022
  • Switching times in Class-E RF power amplifiers 14/05/2022
  • 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
  • Sontheimer coupler – transformer issues 03/05/2022
  • 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

Archives

  • May 2022
  • April 2022
  • March 2022
  • February 2022
  • January 2022
  • December 2021
  • November 2021
  • October 2021
  • September 2021
  • August 2021
  • July 2021
  • June 2021
  • May 2021
  • April 2021
  • March 2021
  • February 2021
  • January 2021
  • December 2020
  • November 2020
  • October 2020
  • September 2020
  • August 2020
  • July 2020
  • June 2020
  • May 2020
  • April 2020
  • March 2020
  • February 2020
  • January 2020
  • December 2019
  • November 2019
  • October 2019
  • September 2019
  • August 2019
  • July 2019
  • June 2019
  • May 2019
  • April 2019
  • March 2019
  • February 2019
  • January 2019
  • December 2018
  • November 2018
  • October 2018
  • September 2018
  • August 2018
  • July 2018
  • June 2018
  • May 2018
  • April 2018
  • March 2018
  • February 2018
  • January 2018
  • December 2017
  • November 2017
  • October 2017
  • September 2017
  • August 2017
  • July 2017
  • June 2017
  • May 2017
  • April 2017
  • March 2017
  • February 2017
  • January 2017
  • December 2016
  • November 2016
  • October 2016
  • September 2016
  • August 2016
  • July 2016
  • June 2016
  • May 2016
  • April 2016
  • March 2016
  • February 2016
  • January 2016
  • December 2015
  • November 2015
  • October 2015
  • September 2015
  • August 2015
  • July 2015
  • June 2015
  • May 2015
  • April 2015
  • March 2015
  • February 2015
  • January 2015
  • December 2014
  • November 2014
  • October 2014
  • September 2014
  • August 2014
  • July 2014
  • June 2014
  • May 2014
  • April 2014
  • March 2014
  • February 2014
  • January 2014
  • December 2013

Categories

  • Admin
  • Amateur Radio
  • Antenna Tuners (ATU)
  • Antennas
  • APRS
  • Arduino
  • Baluns
  • Computing
  • Cooking
  • Electrical
  • Electronics
  • IoT
  • Maker
  • Measurement
  • Miscellaneous
  • NanoVNA
  • RC models
  • Receivers
  • RPi
  • Slot cars
  • Small Transmitting Loops
  • Telecommunications
  • Test equipment
  • Transmission lines
  • Transmitters
  • Uncategorized
  • VK1OD projects

Meta

  • Log in
  • Entries feed
  • Comments feed
  • WordPress.org

Links

Sitemap

Pages

  • Digital document signatures
  • Listings
  • My Listings
  • Search Results
  • The fine print
  • VK1OD.net closure

Tags

  • AIM use & issues
  • Designing high performance VHF/UHF receive systems
  • Exploiting your antenna analyser
  • IC-7410 tests
  • LiG
  • Noise FIgure Meter
  • RFPM1

Category: Uncategorized

VK1OD Roger Beep project documentation

RB

With the forced end of the VK1OD.net website, some builders of the Roger Beep kit may be without documentation.

Continue reading VK1OD Roger Beep project documentation

Last update: 17th June, 2014, 8:51 AM
Posted on 14/12/201317/06/2014Categories Maker, Uncategorized, VK1OD projects

Posts navigation

Previous page Page 1 Page 2 Page 3
Proudly powered by WordPress