What is Doublet Antenna for Multiband Operation? Doublet antenna is a form of dipole antenna with a balanced feeder like an open wire feeder or ladder-line used along
What is Counterpoise in an Antenna System? A simple definition of counterpoise is a conductor or system of conductors used as a substitute for earth or ground in
What is G5RV Antenna? G5RV Antenna is a multi-band Amateur Radio Antenna designed by Louis Varney, who passed away in 2000 at the age of 89 years. Currently
5/8 λ Vertical Antenna Recently I installed a CP22E Antenna which is a stacked two element 5/8 λ Vertical Antenna with a phasing coil in between. 5/8 λ
Pictorial Review of Power Supply Components Here is a brief pictorial review of some important components seen in a power supply. Power transformer is one of the heaviest
Car Mobile Phone Charger This car mobile phone charger fits into the cigarette lighter adapter available in every car. Power on will be indicated by the lighting up
What is NanoVNA and How is it Useful for the Radio Amateur? NanoVNA is a handheld Vector Network Analyzer useful for measuring and analyzing radiofrequency circuits. NanoVNA works
Choke Coil in VHF Antenna Coaxial Cable This picture shows the choke coil in the coaxial cable when I mounted the CP22E VHF antenna. Manufacturers have suggested one
