Friday, June 1, 2012

900MHz RF Amplifier based BFG480W

Circuit Diagram:
900MHz RF Amplifier based BFG480W

This is the circuit diagram of 900MHz RF amplifier built based transistor BFG480W manufactured by Philips. The circuit features low noise, good linearity performance and works well for high frequency application.

Tuesday, April 17, 2012

RF Power Amplifier: Theory, Design and Practice

RF Power Amplifier: Theory, Design and Practice

This is a document that explains the design and development of power RF amplifiers applied in an Amateur Radio station. An amplifier may possibly necessary to build as much as 1500W of RF output power, the legal maximum in the United states.

Thursday, February 23, 2012

40M Band RF Preamp with 3 Tuned Filters

40M Band RF Preamp with 3 Tuned Filters

This is the schematic diagram of 40M band RF preamp with 3 tuned filters. Above image is an experimenter's 40 Meter band front end for CW. This has a double-tuned filter and a low gain, lower noise RF amplifier. This is a great circuit for isolation of a product detector or mixer in a popcorn receiver.