I've bought some 30dB SMA pads from Huber&Suhner. 

Here some measurements using the miniVNAtiny with vna/J:

HuberSuhnerSMA30dB Detailed

 

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Kategorie: Measuring Technology

Ich habe von **** eine gebrauchte, schaltbare Eichleitung gekauft. Laut Aufschrift stammt sie von **RE Instruments** aus Jülich. Sie dürfe aus der Zeit vor der Jahrtausendwende stammen und ist wohl aus einem HF-Signalgenerator ausgebaut worden.

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Kategorie: Measuring Technology

Based on the work of Makis, SV1AFN i've build a small, stand-alone power meter with a "nice" GUI. This is the second RF head I've received from Makis. Data about the first one can be found here. MainScreen

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Kategorie: RF Powermeter

Here you can find the last spots for DL2SBA on each band within the last day and the all time farest spots.

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Kategorie: WSPR

Here I've collected some configuration stuff for my KiwiSDR.

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Kategorie: SDR

Today we had a meeting in our local amateur radio club ESSLINGEN P02.The topic for this meeting was WSPR.

Bernd DK9BH was the organizer of this meeting. He has ordered about 10 WSPRlites from SOTABEAMS. 

I had the chance, to do same basic measurements on one of the WSPRlite units.

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Kategorie: WSPR

Last year I've build the cheap Frog Sounds QRP Transceiver. This transceiver has a pretty basic audio section - a simple LM386 audio amplifier with some LC/RC filtering.

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Kategorie: Shack

 

Here are the first pictures of my KiwiSDR setup ...

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Kategorie: SDR

I've build the original QRP-labs U3S from stock. Means the supplied crystal on the PLL-based synthesiser-board.

This configuration is basically working up to 20m with a lot amount of drift, but you will get many decodes on wsprnet.org. On 6m you can also get spots - once a day :-/

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Kategorie: WSPR

  1. WSRP - 2nd U3s finished
  2. KiwiSDR - Local SDR up and running
  3. Powermeter von DG7XO
  4. WSPR - QRP-Labs low pass filters
  5. WSPR - QRP-Labs U3S signal quality
  6. WSPR - QRP-Labs U3S
  7. WSPR - QRP-Labs U3S bad power supply
  8. RF Powermeter - Unstable reading - Reloaded
  9. hamware AT-515 Firmware
  10. hamware AT-615B Firmware
  11. hamware AT-502 Firmware - Erweiterung für 160m und 80m
  12. hamware AT-502 Firmware - Update CI-V Schnittstelle
  13. hamware AT-502 Firmware - IRB P02
  14. hamware AT-502 Firmware - K2+RUMLOG
  15. hamware AT-502 Firmware - Kenwood erweitert
  16. GPSDO - Distribution Amplifier
  17. GPSDO - Commandline interface
  18. GPSDO - Some Measurements
  19. GPSDO - GPS Disciplined Oscillator
  20. RF Powermeter - Firmware 1.8.0
  21. RF Powermeter - Firmware 1.7.2
  22. RF Powermeter - Unstable readings
  23. RF Powermeter - Firmware 1.7.1
  24. RF Powermeter - Firmware 1.5.0
  25. RF Powermeter - Adopted Nextion library
  26. RF Powermeter - Precision
  27. SOTA - Flight deck for KX3
  28. SOTA - DM/BW-094 - Kornberg
  29. SOTA - DM/BM-344 - Kleiner Kulm - My first activation is done
  30. SOTA - Working conditions

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

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