My current setup to operate ES'hail & QO-100.

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Kategorie: Satellite

My previously used pre-amplifier (the one in front of the final PA) only delivers a gain of abt. 9dB @2.4GHz. This was far too less for my final PA used.

I found this amplifier on AliExpress. It delivers a solid gain:

  • Diese E-Mail-Adresse ist vor Spambots geschützt! Zur Anzeige muss JavaScript eingeschaltet sein!
  • Diese E-Mail-Adresse ist vor Spambots geschützt! Zur Anzeige muss JavaScript eingeschaltet sein!
  • 26dB@435MHz

The performance matches excellent to the given gain of Diese E-Mail-Adresse ist vor Spambots geschützt! Zur Anzeige muss JavaScript eingeschaltet sein! n the sellers spec. 

With this new pre-amplifier I now get 2W@2,4GHz to the dish - the QSOs have to show :-)

 

 

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Kategorie: Satellite

Here are some impressions on contest I've participated over the last years ...

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Kategorie: Contest

Intro

tbd

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Kategorie: GPSDO

To protect the fragile LimeSDR mini PCB I placed the SDR inside an aluminium case.

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Kategorie: Satellite

I received a new WLAN grid antenna from a fellow Ham - thanks for this!

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Kategorie: Satellite

Introduction

tbd

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Kategorie: Satellite

I found a very interesting air quality sensor board from the Germany company OhmTech on Tindy. One of this magic Bosch Sensortec sensor - the BME680 - is used in conjunction with an STM032F72 microcontroller to give a neat "USB-sensor-stick":

 (c) ohmtech.io

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Kategorie: IoT Internet of Things

My Mosquita got a new housing as described in this post. As you can see, there is still enough room for a memory morse keyer.

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Kategorie: Transceiver

Here some pictures of the recent SSTV transmission from ISS. They are received using a cheap SDR stick and the NOAA antenna from WIMO under the roof abt. 7m above ground. Decoding is done using MMSSTV.

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Kategorie: Satellite

I have some stuff for sale. Please contact me by Diese E-Mail-Adresse ist vor Spambots geschützt! Zur Anzeige muss JavaScript eingeschaltet sein! if you're interested. Prices are negotiable.

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Kategorie: For sale / Zu verkaufen

Santa brought me a new Synology Ds218+ NAS :-)

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Kategorie: Synology

Here a short description how I set up my RPi to send mail, usually sent to the users mbox to an SMTP server.

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Kategorie: Raspberry Pi

Simple full restore IOT database

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Kategorie: IoT Internet of Things

Ich habe die Firmware für die Hamware Tuner um den Yaesu FTDX-5000 erweitert.

In Verbindung mit dem Logbuchprogramm Swisslog folgt der Tuner automatisch der eingestellten Frequenz.

Nähere Infos sind hier zu finden.

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Kategorie: hamware

Simple full backup IOT database

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Kategorie: IoT Internet of Things

According to node-red cookbook all files in the .node-red subdirectory should be backuped - except files in "node-modules" sub-directory:

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Kategorie: IoT Internet of Things

As a logical follow on I opted for a separate Diplexer for my Arrow antenna. I've choosen the WIMO Diplexer #22030.

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Kategorie: Antennen

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.

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Kategorie: Antennen

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 second one - the QRPGuys 40m-10m UnUnTenna Plus.

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Kategorie: Antennen

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 :-)

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Kategorie: Shack

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

Here you find a list of all my SOTA activations

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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.

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Kategorie: RF Powermeter

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:

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Kategorie: RF Powermeter

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.

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Kategorie: Antennen

FM bandstop

RF preamp

 

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Kategorie: SDR

Some years ago I had wxtoimg running on a Windows machine and receiving NOAA images automatically with an analogue receiver.

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Kategorie: SDR

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

Regular supporter of wikimedia