Frog Sounds - Enhancements to the Frog
In 2015 I've build the Frog Sounds QRP transceiver.
This little transceiver still needs improvement:
- The output is still only 400mW
- The key-click is horrible - even with the additional audio cw-filter.
- The suppresion of harmonics is very bad. Check below.
If someone has any ideas how to fix this, please Diese E-Mail-Adresse ist vor Spambots geschützt! Zur Anzeige muss JavaScript eingeschaltet sein!.
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- Kategorie: QRP
Miss Mosquita - a new girl in town
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.
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- Kategorie: QRP
WSPR some data
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.
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- Kategorie: WSPR
RF detectors
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.
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- Kategorie: Measuring Technology
WSPR first data analysis
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!
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- Kategorie: WSPR
WSPR data collector
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 
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- Kategorie: WSPR
vna/J ist umgezogen
Alle Informationen bezüglich vna/J sind auf eine neue Webseite umgezogen:
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- Kategorie: vna/J
2014 CW (Morse Telegraphy) was added to the German Nationwide Inventory of Intangible Cultural Heritage.
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© 2020 Dietmar Krause, DL2SBA