Band 2 Preamplifier
This is a VHF amplifier for the Band 2 Radio Spectrum tuning approximately 88 - 108 Mhz.
Band 2 Preamplifier diagram
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: 336
Print version: 
Other electronic circuits and schematics from Audio
-
100W Audio Amplifier
-
100W RMS Amplifier
-
Automatic Loudness Control
-
5 Watt Class-A Audio Amplifier
-
Simple Intercom
-
10W Audio Amplifier with Bass-boost
-
100W Guitar Amplifier
-
Add on Stereo Channel Selector
-
Stereo Tube Amplifier
-
5 band graphic equalizer using a single IC/chip