Band 2 Preamplifier
This is a VHF amplifier for the Band 2 Radio Spectrum tuning approximately 88 - 108 Mhz.
Band 2 Preamplifier diagram
https://manualmachine.com/The circuit uses two 2N3819 FET's in cascode configuration. The lower FET operates in common source mode, while the upper FET, operates in common gate, realising full high frequency gain. The bottom FET is tunable allowing a peak for a particular station. Coil details follow:
L1 4 turns of 18swg air spaced with a 1cm diameter, the tap is one turn up from earth end...
L2 4 turns of 18swg air spaced with 1 cm diameter. The coupling coil is 1 turn interwound from the supply end. Enamel coated wire must be used.
Title: Band 2 Preamplifier
electronic circuit
Source: unknown
Published on: 2012-09-20
Reads: 821
Print version:
Other electronic circuits and schematics from Audio
-
Low cost intercom using transistors
-
Sound Controlled Filp Flop
-
Audio Distribution Amplifier
-
Headphone Monitoring Switch
-
Digital Volume Control
-
1.5W Audio power amplifier (12V)
-
Minimalist Discrete Hi-Fi Preamp
-
Electronics Attenuator
-
Sound Pressure Level Meter
-
Stereo Preamplifier with Bass-boost