Karl, DK5LP, hat mich auf eine Besonderheit des Logbuchprogrammes RUMLOG für den Mac aufmerksam gemacht.

Dieses nutzt nicht den bisher implementierten IF-Befehl des Kenwood-Protokolls sondern den FA-Befehl.

Ich habe die Firmware entsprechend erweitert, somit sollte auch RUMLOG funktionieren.

Die Beschreibung, entsprechend ergänzt, ist hier zum runterladen.

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Kategorie: hamware

I've build a simple distribution amplifier for my GPSDO.

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Kategorie: GPSDO

My SYMMETRICOM GPSDO 090-03861-03 with firmware release 1.0.0.2-01 has a bunch of commands available:

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Kategorie: GPSDO

I've done some long term measurements on my GPSDO. The GPSDO has a RS232 based simple command interface.

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Kategorie: GPSDO

To have a stable 10MHz reference in my shack, I've ordered a SYMMETRICOM based GPSDO from an Chinese eBay seller. It was delivered in kit form, so no issues with missing CE marking etc.

The GPSDO is build into a sturdy aluminium case with a PCB front panel and an aluminium back panel.

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Kategorie: GPSDO

With the firmware version 1.8.0 I've introduce the capability to display also the input power in Watt instead of dBm. Simply tap on the unit field on the display to toggle between dBm and Watt.

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Kategorie: RF Powermeter

I've introduced with the firmware version 1.7.1 a complexity to this project which may not be suitable to all users.

WIth the firmware version 1.7.2 I've reduced the complexity by removing the remote configuration utilities.

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Kategorie: RF Powermeter

If you are using my powermeter software in conjunction with Maki's module and have a unstable readings or sporadic extrem value changes, this is a problem of the CS pin. It may be a grounding issue - Makis is currently analysing the problem.

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Kategorie: RF Powermeter

I've developed a new firmware for my RF Powermeter. In this firmware, the user can now program for six calibration points the factors for the polynimial regression functions.

Therefor I've developed a JAVA GUI application for downloading these floating point values to the device.

*** CAUTION ***
All stuff described in this post is ONLY running on an Arduino which runs the OptiBoot bootloader. The EEPROM capability of the OptiBoot bootloader is needed for the features of firmware V1.7.1

I described here a way how to flash the OptiBoot loader on an Arduino UNO clone. For this you need an ISP or a second Arduino to act as an ISP.

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Kategorie: RF Powermeter

I've added a new feature to the firmware release 1.5.0 V1.5 1 - power offset V1.5 3.

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Kategorie: RF Powermeter

The original library from Dan is not working as expected for me. So I adopted the code a little bit.

You can find the changes below. You can also download "my version" of the library here. Unzip into the Arduino's library folder.

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Kategorie: RF Powermeter

As described here, I've build an RF Powermeter.

The basic firmware is now running. So I started analysing the accuracy of the used meter head.PowerDev

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Kategorie: RF Powermeter

Inspired by the work of Richard G3CWI from SOTABEAMS and his flight decks for some QRP transceivers, I decided to build a matching one for my ELECRAFT KX3.

DSCF4266

Starting point was a clipboard which can be found for some bucks at AMAZON. In the lower section, I can simply secure my log sheets with the strong clip.

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Kategorie: SOTA

My second SOTA activation is done. Monika (DL6SCF) and I made a short hiking trip on the Swabian Alps. On top of the Kornberg we made a stop and started the activation ... unfortunately we have to shut down operation due to a rising thunderstorm.

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Kategorie: SOTA

During a business trip, I took the chance to activate a mountain in the Bavarian low mountains - Kleiner Kulm.

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Kategorie: SOTA

My current working conditions for SOTA are:

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Kategorie: SOTA

I've used one of these cheap switch-mode DC-DC converters (available on eBay for a few bucks) for my WSPR U3S transmitter. Checking the transmitted signal reveals strong spurious emissions. Hints from the QRPLabs group leads me to the cause - the DC-DC converter. Replacing it with a linear LM317 one solves the problem.

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Kategorie: Power supply

I've checked this extremly simple concept for spurious emissions and whether they're compliant with the current regulations ...

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Kategorie: QRP

Yesterday I've build the FROG SOUNDS 40m CW QRP transceiver.

I've ordered it as a kit from eBay Seller for about €10,- inclusive shipping to DL. The kit arrived well packed after about 15 days in my postbox.

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Kategorie: QRP

Currently I've done 6 QSOs with the Frog and my dipole antenna.

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Kategorie: QRP

  1. Frog Sounds - Enhancements to the Frog
  2. Miss Mosquita - a new girl in town
  3. WSPR live data
  4. WSPR some data
  5. RF detectors
  6. WSPR first data analysis
  7. WSPR data collector
  8. PiAware
  9. vna/J ist umgezogen
  10. vna/J moved to a new location
  11. Reflash Arduino UNO ATMEGA16U2
  12. IoT Powersensor #2
  13. IoT Powersensor #1
  14. Arduino Library for AD7887
  15. RF Duinode
  16. ADS-B Filter
  17. IoT System management
  18. IoT MQTT Infrastructure
  19. IoT MQTT configuration
  20. ELECRAFT K-POD
  21. Rotator control with a NodeMCU runs stable
  22. Detailed measurement on audio CW-filter
  23. Audio CW-Filter finished
  24. Rotator control and the NodeMCU - a proof of concept
  25. Wanderungen/Ausflüge
  26. CW-Sensor-Keyer
  27. IoT Lightsensor
  28. Worked all Germany contest 2015
  29. ELECRAFT K2 - Fixing VFO ALC issue
  30. XPhase - Interference reduction

2014 CW (Morse Telegraphy) was added to the German Nationwide Inventory of Intangible Cultural Heritage.

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