My latest interest in the Parks On The Air program gave me enough reason to buy a nice little kit: the QCX mini from QRP-labs. After watching a great deal of POTA-video’s on YouTube, I decided to get a portable, CW-only rig. I didn’t mind if it is a single band version. QRP-labs After some…
Category: Home brew
MRF300AN RF Mosfet
Bumped into an interesting article the other day: a cheap power amplifier with two MRF300AN LDmosfets from NXP. The MRF300 produces about 300 watts @ 50V and operates broadband from 1.8 – 250 MHz. Razvan M0HZH created a little power amplifier with two of these mosfets which put out around 600 watt with 4.5 watt…
FYM-Delta-loop antenna by PA3FYM
Remco PA3FYM is a big inspiration of many of my projects. This time he convinced me to build the famous FYM-delta-loop as a holiday antenna. Actually it’s a quite simple design from 2015 of the well known delta-loop. In Remco’s design of the FYM-delta-loop it is tuned for 40 meters. Not accidental because during the…