@▷ 15dB UHF Antenna Pre-Amp | Diagram for Schematic

15dB UHF Antenna Pre-Amp

Circuit diagram is the UHF band TV antenna preamp circuit, which with 15dB gain and build by transistor. This was based on BF180 UHF transistor. This circuit is a simple circuit. In the operation of the principle is the two-phase circuits. The first stage is a band pass filter constructed by the C1, CV1, L1, L4, C3 and C7, the second stage is a common-base amplifier with low voltage inputs to Impedance match. Building L1 ~ L4 as air core coil to obtain high Q-Factor. You can find out about the air core coil construction and the calculation here. After assembling, pack into a metal box and connect the ground from the circuit to the box to reduce noise effects. This is the image of the circuit.

15dB UHF Antenna Pre-Amp

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