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

In 2015 I've build the Frog Sounds QRP transceiver.

This little transceiver still needs improvement:

  1. The output is still only 400mW
  2. The key-click is horrible - even with the additional audio cw-filter.
  3. The suppresion of harmonics is very bad. Check below.

If someone has any ideas how to fix this, please Diese E-Mail-Adresse ist vor Spambots geschützt! Zur Anzeige muss JavaScript eingeschaltet sein!.

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Kategorie: QRP

Since last weekend a new QRP transceiver joined my shack V1 I bought her used from a German HAM via the QRPFORUM community. The transceiver is one of the older projects from the DL-QRP-AG but still a neat little transceiver. It is still offered in kit-form from QRP-Project in Berlin.

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Kategorie: QRP

  Live data from my WSPR feed

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Kategorie: WSPR

Here some analysis of my recorded spots data with my spot data collector. As of today there are 45.000 spots recorded in my database.

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Kategorie: WSPR

I've done some measurements on two RF detectors - one on an older diode detector from ELDITEST Elditest 1 and another one on an AD8307 based one SV1AFN from SV1AFN.

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Kategorie: Measuring Technology

My WSPR data collector is now running some days and I started with some basic data analysis.

The power on the bands 60m to 20m is about 100mW!

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Kategorie: WSPR

Inspired from some work found on the Internet and the full functionality of my U3S I've build an automatic spot collector. The spot collector pulls every 5 minutes my spots from WSPRnet.org and puts it into a MYSQL database for later analysis. See the schematic for this setup Wspr V3

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Kategorie: WSPR

  1. PiAware
  2. vna/J ist umgezogen
  3. vna/J moved to a new location
  4. Reflash Arduino UNO ATMEGA16U2
  5. IoT Powersensor #2
  6. IoT Powersensor #1
  7. Arduino Library for AD7887
  8. RF Duinode
  9. ADS-B Filter
  10. IoT System management
  11. IoT MQTT Infrastructure
  12. IoT MQTT configuration
  13. ELECRAFT K-POD
  14. Rotator control with a NodeMCU runs stable
  15. Detailed measurement on audio CW-filter
  16. Audio CW-Filter finished
  17. Rotator control and the NodeMCU - a proof of concept
  18. Wanderungen/Ausflüge
  19. CW-Sensor-Keyer reloaded
  20. CW-Sensor-Keyer
  21. IoT Lightsensor
  22. Worked all Germany contest 2015
  23. ELECRAFT K2 - Fixing VFO ALC issue
  24. XPhase - Interference reduction
  25. LF-Converter
  26. SMD Solder Station
  27. Connecting an Arduino to MOSQUITTO
  28. Getting started with MOSQUITTO
  29. Getting started with 2lemetry
  30. Neuer DARC Image Film

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

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