VHF Preamplifier for FM Broadcasting 88MHz-108MHz (Band II)

Above schematic diagram is the circuit of VHF pre-amplifier for FM broadcasting (frequency 88MHz-108MHz, band II)

The circuit is working with two 2N3819 FET's in cascode configuration. The lower FET works in common source mode, while the upper FET, works in common gate, realising full high frequency gain. The bottom FET is adjustable allowing a peak for a particular station.

40W Wideband RF Power Amplifier 88 - 108 MHz based MRF171A

This is the circuit diagram of 40W wideband RF power amplifier 88 - 108 MHz build based MOSFET MRF171A. The purpose of this circuit is to boost the output power of low power FM broadcast band exciters, a number of these are available commercially, both as kits and ready made.

This design is based on a new MOSFET device, with the attendant advantages of high gain, high efficiency and ease of tuning.

8W FM RF amplifier 88-108MHz with BLV10

This is 8W FM RF amplifier for frequency range of 88-108 MHz with no tune broadband) needed to cover all the FM Band. The circuit use BLV10 as the main amplifier component. You need the 2N3866 driver stage to boost properly the BLV10 transitor.

Circuit diagram: