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Amplifier Schematics - RF Radio Frequency

1 Watt Universal Class 'C' RF Amplifier

100kHz to1GHz RF Power Detector - Linear Technology LTC5507)

2W RF Amplifier For 24/23 CM - This page describes TX ATV Transmitter for 23 cm with output adjustable from 100 to 250mW.

3 Watt 2.3 GHz RF Amplifier using a MRF2001

300W MOSFET Linear Amplifier for 50 MHz - Application Note Microsemi-formerly Advanced Power Technology APT9802

50 Mhz, 250w Amplifier Using Push-Pull Arf448a/B - Application Note Microsemi-formerly Advanced Power Technology APT9702A

500w HF Linear Amplifier

500W, Class E 27.12 MHz Amplifier Using A Single Plastic MOSFET - Application Note Microsemi-formerly Advanced Power Technology APT9903

60 Watt RF Amplifier - Solid state RF power amplifier using IRF840. Simple and easy to construct. IRF840 can handle a maximum power output of 125 Watts.

7MHz SSB Transceiver - Circuit diagram and brief description of 7MHz SSB Transceiver for Hams. The circuit is designed around two numbers of MC1496. It can push around 80 Watts with IRF840 in  final. You can down load HTML version or  printer friendly word document.

807 & 1625 Valves - data on vacuum tubes 807) and 1625 used in ham radio transmitters. Describes various pin voltages and different operation modes.

90 MHz voltage controlled oscillator for FM Band  - Notice the abundance of 2N4401, 1 k resistors and 330 Ohm resistors? That's because I have a lot of each. 2N4401's weren't intended to be used as varactors, but they work just fine. Don't be afraid to experiment with the parts you have on hand. Build this on a ground plane board. Layout is important.

A 300W MOSFET Linear Amplifier for 50 MHz - Application Note Microsemi-formerly Advanced Power Technology APT9802

A 50 Mhz, 250w Amplifier Using Push-Pull Arf448a/B - Application Note Microsemi-formerly Advanced Power Technology APT9702A

A High-Efficiency 400 Watt 13.56 MHz RF Power Amplifier - Application Note Microsemi formerly Advanced Power APT9501

A Precision Portable Voltage Reference - It has been said that a man with one watch knows what time it is, but a man with two watches is never sure.  The same can be said for a person who has more than one voltmeter.  In my situation, I have several voltmeters in each of two different locations a third of the way around the world apart. The best solution would be to send the meters to  NIST traceable calibration labs

A Push-Pull 300-watt Amplifier for 81.36 MHz - This article describes a 300 watt amplifier for 81.36 MHz using a push-pull pair of plastic packaged devices. The design techniques and construction practices are described in enough detail to permit duplication of the amplifier. Application Note Microsemi-formerly Advanced Power Technology APT9801

A Simple Method to Reduce DC Power Consumption in CDMA RF Power Amplifiers Through the LMV225 & an Efficient Switcher - National Semiconductor Application Note

A Superhet/Direct Conversion AM receiver for 181.818 kHz  - This is a description of an experimental AM receiver for VLF. It is crystal controlled to receive 181.818 kHz (more or less) and operates as either a single conversion superhetrodyne or a direct conversion receiver. The bandwidths are expected to be 15 Hz to 3.5 kHz in superhet mode and 15 Hz to 10 kHz in the direct conversion mode. Operation is from a singler..

AN-1438: A Simple Method to Reduce DC Power Consumption in CDMA RF Power Amplifiers Through the LMV225 & an Efficient Switcher - National Semiconductor Application Note

AN-543: High Quality, All-Digital RF Frequency Modulation Generation with the ADSP-2181 & the AD9850 DDS  - AN-543-Analog Device Application Notes

AN-60-008  Operating precautions for RF Amplifiers - Application Note MiniCircuits.com

Battery operated FM rebroADCast transmitter

BroADCast-Band RF Amplifier

Capabilities Of Low-Cost High Voltage RF Power MOSFETs At Hf & Vhf - Application Note Microsemi-formerly Advanced Power Technology APTB981

CMOS Logic Inverter Amplifier Characteristics - This chart shows some of the measured characteristics of three different un-buffered CMOS logic gates, used as voltage amplifiers.

Controlling TDMA Timeslot Power Levels using the Esg-D Series, RF Signal Generators - Aligent App Note

Crystal Radio RF Amplifier - One of the best places to add a transistor to a simple crystal radio is at the front end in the form of an RF amplifier. The circuit below is a simple but effective amplifier which will give surprising performance improvement.
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