80 to 6 meters, 2 KW, designed to be used at heights of only 25 to 45 feet, includes a twenty foot long vertical radiator
The unit was designed to assist with antenna comparisons
The function of the XPhase is based on the fact that the interfering signal, received by an auxiliary antenna, is added phase-shifted to the signal received from the main antenna. When the phase-shift is more or less 180°, the interfering signal is canceled out.
With the bluecat interface it is possibile to connect a Yaesu FT 817 857 897 to a computer or a android smartphone without any cable or interface, using a bluetooth wireless connection
Who needs a GaAsFET? Tuning, constructions and Packaging by Paul Wade
Schematic of Yaesu FT-857 main board original jumpers based on different radio type
Spectrum Analyzer Fundamentals is a great document explaining everything about Sprectrum analyzers, main features, differences, usage and characteristics provided by Keysight Technologies. Inc
An online multiple calculator of 16 impedance matching networks
N-channel scalable coherent receiver that employs the RTL-SDR technology in order to create inexpensive multi-channel receiving systems.