The 11-54 power amplifier operates over the frequency range 138-162MHz and with 4-5 watts input it will deliver 25 Watts. It has a switching bandwidth of ±5MHz with 20 Watts minimum output.
The power sense operates with a minimum of 3 watts input and switches both the power and aerial relays. The 11-54 will operate satisfactorily down to 400mW drive but the PTT connection must be grounded to operate the receive to transmit changeover.
A 2dB 50 Ohm input matching pad allows for connection to a wide range of driving devices and mis-tuning without the risk of instability.
In the receive mode it will pass a receive signal with less than 1dB attenuation.
The 3 stage aerial filter attenuates all spurious emissions to less than -30dBm.
The 11-54 is protected against accidental power connection reversal.
The green Power LED operates at all times with power connected and the red Transmit LED operates only when the 11-54 is switched to the transmit mode (PTT activated).