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IoT - NodeRED - Backup
According to node-red cookbook all files in the .node-red subdirectory should be backuped - except files in "node-modules" sub-directory:
WIMO Diplexer #22030 - 2m/70cm 100W
As a logical follow on I opted for a separate Diplexer for my Arrow antenna. I've choosen the WIMO Diplexer #22030.
ArrowAntennas 146/437-10BP - first measurements
The HAM RADIO 2018 in Friedrichshafen brought me a new antenna - the Arrow Antennas 146/437-10BP - I plan to use it for SOTA work as well as for working some amateur radio satellites.
QRPGuys 40m-10m UnUnTenna Plus
In the German QRPForum someone mentioned a group of QPR enthusiasts QRPGuys. They have some neat QRP kits - transceivers as well as antenna-tuners.
I gave these kits a try: QRPGuys Portable Tri-Band Vertical Antenna and the QRPGuys 40m-10m UnUnTenna Plus 
Cheat sheet for HamGadgets Ultra Picokeyer
I've made a simple cheat sheet for my HamGadgets Ultra Picokeyer because it is hard to remember the various key sequences and abbreviations in the menu mode :-)
SOTA - DM/BW-078 - Römerstein
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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. |
SOTA - DM/BW-855 - Michelsberg
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.
SOTA - DM/BW-659 - Kaltes Feld
The first SOTA activation for 2018 is done. Monika (DL6SCF) and I activated the "Kaltes Feld" DM/BW-659.
RF Powermeter - Precision V2
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.
RF Powermeter - Firmware 1.9.0
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:
QRPGuys Tri-Band Vertical Antenna
In the German QRPForum someone mentioned a group of QPR enthusiasts QRPGuys. They have some neat QRP kits - transceivers as well as antenna-tuners.
I gave these kits a try: QRPGuys Portable Tri-Band Vertical Antenna and the QRPGuys 40m-10m UnUnTenna Plus
This post deals with the first one - the QRPGuys Portable Tri-Band Vertical Antenna:
Weather satellites reception - first steps on Linux
Some years ago I had wxtoimg running on a Windows machine and receiving NOAA images automatically with an analogue receiver.
Read more: Weather satellites reception - first steps on Linux
IoT - InfluxDB - first steps
Data aggregation
Here the first step to automated data aggregation of sensor data ...
IoT - InfluxDB - Setup
Logbook for basic setup of InfluxDB 1.02 on Raspberry Pi 3
IoT - NodeRED - Setup
Logbook for basic setup of NodeRED on Raspberry Pi 3
IoT - Setup Raspi 3 for nodeRED & InfluxDB
Logbook for basic setup of Raspberry Pi 3
- IoT - ESP8266 & Arduino
- Weinschel 40dB fixed high power coaxial attenuator
- Huber&Suhner 30dB pad SMA
- Chinese DC-Block
- KiwiSDR - configuration
- WSPR - WSPRlite
- KiwiSDR - first impressions
- WSRP - 2nd U3s finished
- KiwiSDR - Local SDR up and running
- KiwiSDR - technical details
- WSPR - Drift problems & new synthesizer board
- RF Powermeter - Unstable reading - Reloaded
- RF Powermeter - Firmware 1.8.1
- SOTA - Working conditions
- hamware - FT890 Unterstützung
- RF Powermeter - Uploading HMI file
- Switch-mode DC-DC converter
- WSPR - QRP-Labs U3S bad power supply
- RF Powermeter - Firmware 1.8.0
- GPSDO - Distribution Amplifier
- Frog Sounds - Spurious emissions
- Miss Mosquita - a new girl in town
- Frog Sounds - Enhancements to the Frog
- WSPR - last spots
- WSPR live data
- WSPR some data
- RF Powermeter - Firmware 1.7.2
- RF Powermeter - Unstable readings
- RF Powermeter - Firmware 1.7.1
- WSPR first data analysis
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