New boy in town - QCX-mini

Last weekend I've finished my QCX-mini kit for 20m from QRPLabs.

This was a birthday present from my wife and she is very happy, that the QCX-mini now works great ;-) I'm too ...

On Sunday I was able to make three contacts to the US south coast - 5w and a dipole - thats fine.

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Kategorie: Transceiver

Zuletzt aktualisiert: 10. Februar 2021

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CW-Sensor-Keyer reloaded

You may have seen my build version of the M0UKD sensor keyer and the Bamatech sensor head.

As you can see in this post, I've used a simple slide switch to control the power for the sensor keyer. This was a little bit annoying, as you must always check, whether you've turned of the power, when you leave the shack.

As power consumption is not really a big issue - the keyer draws about 2.5mA from two AA-cells. Based on the capacity of an average Energizer Classic AA battery of 1.200mA you will get an on-time of about 300h.

Since many months I've had the idea, to add an electronic switch to the keyer, so it switch of automatically after 15 minutes of idle time.

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Kategorie: Shack

Zuletzt aktualisiert: 17. Oktober 2020

Weiterlesen: CW-Sensor-Keyer reloaded

RF Powermeter - Uploading HMI file

The Nextion display needs the content defined in the file PowerMeter.HMI. You can either upload it with the Nextion editor via a serial link to the display or you can copy the TFT file to an SD card and put this into the socket on the Nextion display.

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Kategorie: RF Powermeter

Zuletzt aktualisiert: 18. September 2020

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RF Powermeter - Updated display files

I've updated the the display control files to the current Nextion Editor 1.62:

   HMI-file for the editor: here

   TFT-file for direct load to display: here

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Kategorie: RF Powermeter

Zuletzt aktualisiert: 18. September 2020

SOTA - equipment weight list

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Kategorie: SOTA

Zuletzt aktualisiert: 06. Juni 2020

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Yaesu FT-818 - Modification MIC MH-31

Comparison between an unmodified MH-31 microphone (dynamic mc) at my FT-818 in SSB and a modified (electret capsule)

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Kategorie: Transceiver

Zuletzt aktualisiert: 16. April 2020

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Power usage ...

All data measured using the ELV Energy Master Profi-2 Energy Master Profi-2:

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Kategorie: Measuring Technology

Zuletzt aktualisiert: 19. Dezember 2019

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hamware - FT-991A Unterstützung

Ich habe die Firmware für die Hamware Tuner um den Yaesu FT-991A erweitert.

In Verbindung mit den Logbuchprogrammen UCXLog und Swisslog folgt der Tuner automatisch der eingestellten Frequenz.

Nähere Infos sind hier zu finden.

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Kategorie: hamware

Zuletzt aktualisiert: 07. Dezember 2019

2-tone generator - FA-2-NF etc.

One of my HAM fellows has build a new 2kW HF amplifier. Together with his SDR ANAN-100 he gets really impressive IM3 values.

This inspires me also to do some measurements on my existing HF transceivers - K3 & KX3. For this I needed a two-tone generator.

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Kategorie: Shack

Zuletzt aktualisiert: 11. Oktober 2019

Weiterlesen: 2-tone generator - FA-2-NF etc.