The last couple of years I’m facing much QRM from rf devices and bad solar inverters. To the East the noise increase is sometimes up to 20 dB (!) which makes low signals modes likes FSK/MSK and FT8 nearly impossible.
Remote Station active
Category: ham
K3NG Keyer
Finally I finished my ‘new’ keyer based upon the famous K3NG design. I used a standard Arduino Uno board and made my own shield and enclosure.
QRO PowerMeter for 144 MHz PA
For my 144 MHz PA, I wanted to have a separate power meter to monitor outgoing power. Off course I could have bought a BIRD with all slugs but building one yourself gives a more satisfied feeling.
VSWR bridge for Spectrum Analyzer
A VSWR bridge is a very nice add-on to a Spectrum Analyzer when you want (or need) to measure reflection loss of for example an antenne or load (termination).
The VSWR bridge fits mechanically on a DSA815 Spectrum Analyzer.
Sequencer
For my 70 cm setup (TS930 – MMT432/28 – LPM432/100) I had the need for a sequencer that generates the proper timing to switch all on/off in the correct order.
