Monthly Archive: August 2018

Optimus Pro CS 5 1

Communications Speakers

Have you searched and searched for a good speaker for your ham radio? That perfect speaker that would let you hear voices through the noise and static without hiss? A speaker that isn’t fatiguing...

Inverted L Antenna 0

Inverted L antenna for Reception

Do to it’s ease of construction, the most popular antenna for short wave reception is the inverted “L” antenna. It’s often just a random length of wire strung up as high as possible. My...

Velocity Factor of Coax 0

Velocity Factor of Coax

“The velocity factor (VF), also called wave propagation speed or velocity of propagation, of a transmission medium, is the speed at which a wavefront (of an acoustic signal, for example, or an electromagnetic signal,...