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11-54-0000 25 WATT VHF POWER AMPLIFIER
Product Manual
Daviscomms UK Ltd, Unit 30, Chancerygate Business Centre, 52 Goulds Close, Milton Keynes - MK1 1EQ, U.K.
November 2017
Tuning, Installation and Connections
1.
C13.5V supply to the 11-54 but leave the PTT connection unconnected.
2.
Connect the 11-54 input to a 4W driving device and the output to a power meter or
aerial.
3.
With 4 Watts input drive, tune CV1 and CV2 for maximum output using a plastic, metal
tipped flat bladed screwdriver.
4.
Alternatively, with 400mW minimum input drive, ground the PTT connection and tune
CV1 & CV2 for maximum output to give 10 Watts typical output. The PTT connection can
sometimes be connected straight to the driving device PTT but a steering diode may be
needed in series with the driver PTT if it returns to a voltage lower than +13.5V.
5.
Tuning can be effected through the two holes in the top of the case by removing the
plastic plugs.
