Jun 28 2021
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.
Mar 27 2017
My R&S signal generator (SMS) is a very nice generator but output power is limited to +13 dBm and sometimes you need more ….
Mar 23 2017
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.
Sep 13 2015
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.
PowerMeter
Dec 20 2013
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).
Home made VSWR bridge
The VSWR bridge fits mechanically on a DSA815 Spectrum Analyzer.