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  • Digital display for QRP labs 20W dummy load – part 2 22/06/2022
  • NanoVNA-H – modification of v3.3 PCB to start the bootloader from the jog switch 19/06/2022
  • NanoVNA-H* – a howto do firmware update using STM32CubeProgrammer 18/06/2022
  • Digital display for QRP labs 20W dummy load – part 1 17/06/2022
  • Digital display for VK-AMPS 2kW directional coupler – part 1 14/06/2022
  • Digital display for Revex W560 directional wattmeter – part 1 12/06/2022
  • How important is directional coupler Directivity? 07/06/2022
  • AT-100 ATU Sontheimer coupler using a single binocular ferrite core 05/06/2022
  • ICSP programming of the (tr)uSDX – more on SPI 05/06/2022
  • NanoVNA-H4 – battery charge from discharged 04/06/2022
  • RF Power Meter 2 (RFPM2) – 40dB external attenuator calibration and integration 03/06/2022
  • NanoVNA-H* – my method for firmware updates 01/06/2022
  • (tr)uSDX – review of the directional coupler ADC design 01/06/2022
  • NanoVNA-App – NanoVNA-App-Setup-v1.1.209-OD11 30/05/2022
  • 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

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Category: Maker

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

Atten AT191 review

I purchased an Atten 191 soldering iron thermometer which uses K thermocouple elements from Allendale UK.

hot

Continue reading Atten AT191 review

Last update: 16th February, 2014, 8:08 PM
Posted on 14/12/201316/02/2014Categories Maker, Test equipment

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