OMB FM TRANSMITTER EM 20000 HE DIG

The OMB 20KW FM transmitter, EM 20000 HE DIG PLUS, has been created by the OMB center of development for high efficiency transmitters. It consists on the high efficiency 20KW amplifier, FMA 20000 HE, with >70% efficiency and the EM 250 DIG PLUS, a 250W FM transmitter. The high efficiency 20KW amplifier is composed by six 3-3.5KW amplifying stages (FMA 3000 HE) and it has an approximate consumption of 27.7KVA, so it pays for itself in a short period of time due to its low consumption. This 20KW FM transmitter is also available in Dual Drive version.

MAIN FEATURES OF THE 20KW FM TRANSMITTER MANUFACTURED BY OMB:

– Typical AC efficiency of >70%. Typical RF efficiency of 76%
– 6 amplifying stages with 4 amplifying modules of 900W with MOSFET technology each
– Each amplifying stage contains 3 independent switching power supplies connected in parallel for maintaining the operation of the equipment in case of failure of any of them
– TFT screen and touch keyboard for the control and visualization of operation parameters
– Memory recording of events
– Speed control of cooling fans according to the temperature of power modules for optimizing the consumption and decreasing the acoustic contamination
– Advanced protection against load mismatches without transmission cuts and fast protection in case of excessive reflected power and/or excessive input power.
– Analog telemetry, digital remote control and telemetry RS232, remote control by opened/closed contacts
– Low pass filter, Mains EMI filter
– Automatic power reduction at night when used in combination with the EM 250 DIG PLUS transmitter
– Automatic power reduction in case of high temperature, the equipment returns automatically to its rated power value when the temperature reaches back an average value
– Automatic power reduction in case of failure of one of the power supplies and in case of excessive reflected power
– Automatic voltage control for efficiency optimization