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RF Powermeter - Calibration basics updated

In this post I describe in details, how you can create the calibration factors for k0 ... k3 based on raw data measured with the power sensor.

Details: Kategorie: RF Powermeter; Zuletzt aktualisiert: 23. März 2021

Weiterlesen: RF Powermeter - Calibration basics ** updated **

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.

Details: Kategorie: Transceiver; Zuletzt aktualisiert: 10. Februar 2021

Weiterlesen: New boy in town - QCX-mini

hamware AT-502/AT-515/AT-615B Interface

I've developed a small interface board for the HAMWARe controller AT-502, AT-515 and AT-651B. This interface boards supports RS232 and CI-V communications and can be directly mounted into the controller chassis.

Details: Kategorie: hamware; Zuletzt aktualisiert: 04. Januar 2021

Weiterlesen: hamware AT-502/AT-515/AT-615B Interface

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.

Details: 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.