Great spaces: longwire or dipole?
One of the most tempting all-band cheap antenna solution when a lot of space is available is the “long wire”. The idea is to lay a […]
The myth of SWR causing coax radiation
In the world of HAM radio, there are several myths that survive through generations despite them clashing with laws of physics. However it is quite […]
PL-259 vs. N, round 2: hard testing
(Note: this article is available also in Russian, thanks to Oleg UA9UAX!) [PL-259 vs. N on 430 MHz follow-up] – Many OM assert that they can not withstand the performance […]
PL-259 vs. N on 430 MHz
(Note: this article is available also in Russian, thanks to Oleg UA9UAX!) [Read also the follow-up: PL-259 vs. N, round 2: hard testing] Ham radio makers often offer […]
100 grams 4 elements VHF Yagi-Uda
Introduction One of my favourite hobbies is to trek and climb the Alps and do ham activity wherever I reach. During the warmer seasons, I […]
Dual quad antenna
I have been thinking a while for a simple antenna that allowed me a good DX coverage of 20-17-15-12-10m bands. There are basically two ways […]
Training fast CW on Android (Koch method)
NOTICE: I have released a completely new version 2 of the IZ2UUF Morse Koch CW application. The new application is currently at the stage of […]
Simulating insulated wires with NEC-2
The NEC-2 engine, used by many antenna simulation free programs, has no direct way to simulate insulated wires. This is a pity, because it is […]
Measuring line impedance with MiniVNA
Today I wanted to measure the characteristic impedance of a unknown transmission line; in this case, it was a Hi-Fi stereo line I bought from […]
VHF coverage maps
Thanks to the great Radiomobile software by VE2DBE I have been able to calculate a coverage map for the 2m band from some ham stations. […]