This circuit amplifies the signals in the UHF band starting at 470 MHz, reaching just over 900 MHz, with the transistors used. In the elaboration, the board design is critical, the components must be as close as possible and the signal inputs must be made with appropriate connectors. L1 has 4 turns of wire 28 in the form of 0.5 cm without core and L2 as well. L3 is formed by 5 turns. Any changes to these components may be necessary according to each assembly. The capacitors are all high-quality ceramic. The supply is made with voltage from 9 to 12 V. Equivalent transistors with higher gains and higher transition frequencies can be used.
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