FRB 1
Watt RF Amplifier Kit
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Begin by laying out the parts on the
circuit board to get a feel for the situation. Solder the components to
the pads and areas indicated in the layout diagram below. Keep coil,
resistor, capacitor, and inductor leads as short as possible and raised
about 1/16 to 1/8 inches above the surface of the circuit board. The
area surrounding the pads is ground. C1 & C2 are soldered at one end
to the ground area as well as the shield braid on the coax cables. Slip
the top hat heat sink on Q2 for proper heat dissipation.
With an input level of 10-15mw, tune variable trip capacitors C1-C4 for
maximum power - do not exceed 1 watt. Be sure to have a proper dummy
load (50 ohms) or tuned antenna connected to the output, doing otherwise
will likely destroy the transmitter.
|