I've bought some 30dB SMA pads from Huber&Suhner.
Here some measurements using the miniVNAtiny with vna/J:
Ich habe von **** eine gebrauchte, schaltbare Eichleitung gekauft. Laut Aufschrift stammt sie von **RE Instruments** aus Jülich. Sie dürfe aus der Zeit vor der Jahrtausendwende stammen und ist wohl aus einem HF-Signalgenerator ausgebaut worden.
Based on the work of Makis, SV1AFN i've build a small, stand-alone power meter with a "nice" GUI. This is the second RF head I've received from Makis. Data about the first one can be found here.
Here you can find the last spots for DL2SBA on each band within the last day and the all time farest spots.
Here I've collected some configuration stuff for my KiwiSDR.
Today we had a meeting in our local amateur radio club ESSLINGEN P02.The topic for this meeting was WSPR.
Bernd DK9BH was the organizer of this meeting. He has ordered about 10 WSPRlites from SOTABEAMS.
I had the chance, to do same basic measurements on one of the WSPRlite units.
Last year I've build the cheap Frog Sounds QRP Transceiver. This transceiver has a pretty basic audio section - a simple LM386 audio amplifier with some LC/RC filtering.
Here are the first pictures of my KiwiSDR setup ...
I've build the original QRP-labs U3S from stock. Means the supplied crystal on the PLL-based synthesiser-board.
This configuration is basically working up to 20m with a lot amount of drift, but you will get many decodes on wsprnet.org. On 6m you can also get spots - once a day :-/
2014 CW (Morse Telegraphy) was added to the German Nationwide Inventory of Intangible Cultural Heritage.
© 2022 Dietmar Krause, DL2SBA