Compact mast amplifiers made of die-cast mechanics and equipped with impact-resistant plastic outer protection provided with a metal clamp for attachment to the mast. Designed for connection to BIII UHF or LogPeriodic antennas. They differ in number and type of inputs, for the gain (10 to 35 dB) for the power level (111/115/117 dbµv) They guarantee an excellent linearity in the working band and a low noise figure. All models are fully compatible with the new broadcast standards and, thanks to the integration of a special selective filter, with the current DTT UHF band (470... 694 MHz) reduced following the reassignment of frequencies to LTE/5G telephony operators.