Posted on Thursday, October 7, 2010 • Category:
Antennas
This is an UHF band TV antenna preamplifier circuit With 15dB gain to build easily. It is formed based on BF180 UHF Transistor. The first stage is an band pass filter constructed by the C1, CV1, L1, L4, C7 and C3, the second stage is a base-common voltage amplifier with low input impedance to match. Build the L1 ~ L4 as air core coil to obtain high Q-Factor. After assembling, pack it into a proper metallic box and connect the ground of the circuit to the box to reduce noise effect.
VHF FM Antenna Booster Build A 9 dB, 70cm, Collinear Antenna From Coax Active Antenna Folded Dipole Antenna J-Pole Antenna Active Antenna AA-7 HF/VHF/UHF, 3-3000MHz Active Antenna AA-7 HF/VHF/UHF, 3-3000MHz UHF-TV Preamplifier Portable Yagi for 144MHz 88-108Mhz FM Preamplifier Circuit-Zone.com © 2007-2024. All Rights Reserved.