Inspired by the work of Richard G3CWI from SOTABEAMS and his flight decks for some QRP transceivers, I decided to build a matching one for my ELECRAFT KX3.
Starting point was a clipboard which can be found for some bucks at AMAZON. In the lower section, I can simply secure my log sheets with the strong clip.
My second SOTA activation is done. Monika (DL6SCF) and I made a short hiking trip on the Swabian Alps. On top of the Kornberg we made a stop and started the activation ... unfortunately we have to shut down operation due to a rising thunderstorm.
During a business trip, I took the chance to activate a mountain in the Bavarian low mountains - Kleiner Kulm.
My current working conditions for SOTA are:
I've used one of these cheap switch-mode DC-DC converters (available on eBay for a few bucks) for my WSPR U3S transmitter. Checking the transmitted signal reveals strong spurious emissions. Hints from the QRPLabs group leads me to the cause - the DC-DC converter. Replacing it with a linear LM317 one solves the problem.
I've checked this extremly simple concept for spurious emissions and whether they're compliant with the current regulations ...
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.
Currently I've done 6 QSOs with the Frog and my dipole antenna.
In 2015 I've build the Frog Sounds QRP transceiver.
This little transceiver still needs improvement:
If someone has any ideas how to fix this, please Diese E-Mail-Adresse ist vor Spambots geschützt! Zur Anzeige muss JavaScript eingeschaltet sein!.
Since last weekend a new QRP transceiver joined my shack 
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.
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.
I've done some measurements on two RF detectors - one on an older diode detector from ELDITEST 
and another one on an AD8307 based one 
from SV1AFN.
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!
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 
Alle Informationen bezüglich vna/J sind auf eine neue Webseite umgezogen:
All information regardung vna/J is moved to my new site
In case you've bricked the UNO bootloader or even the USB bootloader in the ATMEGA16U2, this may help ...
For the main power distribution in my house, I also build a powersensor. The basic idea is the same as for this sensor. But the electric meter is already build into the distribution cabinet, so this power meter uses the so-called S0 bus of the power meter inside the cabinet.