With the firmware version 1.9.0 there are some minor enhancements:

  • Peak-hold works now, when offset is set
  • Meter and diagram works in dBm and W mode

Here are the required files:

Details
Kategorie: RF Powermeter

Our third SOTA activation for 2018 is done. Monika (DL6SCF), our daugther Lisa and I activated the Römerstein DM/BW-078. Beautiful weather, a little bit overcast and not too warm. The CONDX where better than last sunday. 

 

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Kategorie: SOTA

 Our second SOTA activation for 2018 is done. Monika (DL6SCF) and I activated the "Michelsberg" DM/BW-855. Beautiful weather - very sunny but not too warm. The CONDX where horrible. Deep QSB from S0 up to S9 from Spain und into the UK - very frustrating.

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Kategorie: SOTA

 The first SOTA activation for 2018 is done. Monika (DL6SCF) and I activated the "Kaltes Feld" DM/BW-659. 

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Kategorie: SOTA

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

After aquiring an HF signal generator, a used HP 8647A, I started to do some testing regarding the precision of the RF powermeter.

Details
Kategorie: RF Powermeter

FM bandstop

RF preamp

 

Details
Kategorie: SDR

Logbook for basic setup of Raspberry Pi 3

Details
Kategorie: IoT Internet of Things

01 01 2018 11 04 47

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Kategorie: IoT Internet of Things

I was able to get a used 40dB power attenuator from a fellow ham. It is a 250W version in a very good condition. The attenuator should be usable up to 6GHz.

Details
Kategorie: Measuring Technology

  1. Chinese DC-Block
  2. Huber&Suhner 30dB pad SMA
  3. Computergesteuerte HF-Eichleitung
  4. RF Powermeter - First steps
  5. WSPR - last spots
  6. KiwiSDR - configuration
  7. WSPR - WSPRlite
  8. Audio CW-Filter NM0S/4SQRP
  9. KiwiSDR - first impressions
  10. WSPR - Drift problems & new synthesizer board
  11. WSRP - 2nd U3s finished
  12. KiwiSDR - Local SDR up and running
  13. RF Powermeter - Calibration basics
  14. Powermeter von DG7XO
  15. WSPR - QRP-Labs low pass filters
  16. WSPR - QRP-Labs U3S signal quality
  17. WSPR - QRP-Labs U3S
  18. WSPR - QRP-Labs U3S bad power supply
  19. RF Powermeter - Firmware 1.8.1
  20. RF Powermeter - Unstable reading - Reloaded
  21. hamware AT-515 Firmware
  22. hamware AT-615U Firmware
  23. hamware AT-615B Firmware
  24. hamware AT-502/AT-515/AT-615U Interface
  25. hamware AT-502 Firmware - Erweiterung für 160m und 80m
  26. hamware AT-502 Firmware - Update CI-V Schnittstelle
  27. hamware AT-502 Firmware - IRB P02
  28. hamware AT-502 Firmware - K2+RUMLOG
  29. hamware AT-502 Firmware - Kenwood erweitert
  30. GPSDO - Distribution Amplifier

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

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