11-99-0000 UHF Power Amplifier
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11-99-0000 UHF 25W Power Amplifier

Power amplifier that operates over the frequency ranges 400-440MHz and 450-500MHz. With 4-5 watts input it will deliver 25 Watts of output power.


Operating over a frequency range of 400-440MHz and 450-500MHz, the Salcom 11-99 Power Amplifier provides up to 25 Watts of power from a 4 Watt input.

The 11-99 covers the full switching bandwidth without retuning with 20 Watts minimum output.

The power sense operates with a minimum of 1 Watt input and switches both the power and aerial relays. It will operate satisfactorily with as little as 1 Watt input power, where it will give approximately 10 Watts out.

A 2dB 50Ω input matching pad allows for connection to a wide range of driving devices without the risk of instability.

In the receive mode, the 11-99 will pass a receive signal with less than 2dB attenuation. The high pass filter is in circuit in the receive mode.

The three stage aerial filter attenuates spurious emissions to less than -30dBm. The 11-99 is protected against accidental power connection reversal.

The green LED operates at all times with the power connected, and the red transmit LED operates only when the 11-99 is switched to the transmit mode.


Frequency Bands 400-440MHz, 450-500MHz
Power Output 25 Watt typical, 4 Watt input
Power Requirements 4 Amps typical
5 Amps max @ 25W output (13.8V)
Power Indication Power connected - green LED, PTT activated - red LED
Duty Cycle 50% @ 25W power output (13.8V)
Stability 2dB 50Ω input pad
Relay switched supply current on PTT command
Switching bandwidth ±5MHz, 20 Watts minimum with 4 Watts input
Power Input 1 Watts minimum 
Transmit enable Power sense circuit operates relay (1 Watt min) 
Receive Mode  
Spurious Outputs -30dBm max 
Case Dimensions 140mm x 105mm x 33 mm 
Reduced Power Operation
Power Input 0.4 Watts minimum for 10 Watt output typically
Transmit enable Ground PTT, 3mA source 
RF BNC input and output 
Power and PTT  2 x 2 way plug and socket, screw connections (supplied) 


Product Brochure 11-99 Product Brochure
User Manual 11-99 Product Manual
Configuration Tool N/A

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