Innovative UHF coaxial UHF preamplifier for 70 cm bands. It works from 420 to 450 MHz with VOX circuit. 900MHz notch filter at the input (eliminates LTE frequencies at the input) You can use it with 100W. Coaxial relay on board. Perfect for EME, SAT, CONTEST and TROPO. Very low noise number (0.35 dB max with ON relay) It is possible to supply via coaxial cable.