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Amplifier Circuits:  RF (Radio Frequency)   Page 1
RF (Radio Frequency):   #'s      A-C        D-L       M-R      S-Z

Amplifier -- Main Page
Last Updated on: Thursday, June 25, 2015 06:20 AM

Circuits Designed by Dave Johnson, P.E. :
  • 2.45ghz RF Signal Detector  -  This passive RF indicator is made from a few simple parts.  A 100uA moving coil meter is used to display the relative intensity of the RF signal.  This circuit can be used with some cell phones and many cordless telephones . . . [Circuit by David Johnson P.E.,  07/09/06]

Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

1 Watt 2.3 GHz RF Amplifier using a MRF2001 -  Simplicity and repeatability are featured in this 1-watt S-band amplifier design.The design uses an MRF2001 transistor as a common base, Class C Amplifier.The amplifier delivers 1-watt output… [electronic design by Michael Micili]

 

1 Watt Audio Amplifier Project (Using the TAA300) -  I built this audio amplifier with the TAA 300 Integrated Circuit (IC) to have on the work bench an independent amplifier to test audio signals coming from radio receivers or audio oscillators. It is an excellent amplifier to drive an eight ohm loudspeaker. You can use it, for example, as an audio amplifier for the FM one transistor receiver known as the Radio Shack Special and/or the TDA 7000 FM receiver; also to test the workings of a pulse oscillator or any other kind of audio oscillators.… [braincambre500 AT yahoo.com]

 

1 Watt Universal Class 'C' RF Amplifier -  Schematic only - no circuit desciption included… [Designer's name is not given]

1.5W VHF Amplifier -  Circuit Schematic only… [Designer's name not included]

 

10 meter (28MHz) band RF amplifier -  If you elect to use an antenna tuner, it is extremely important that you understand exactly how to use tuners and what they can and cannot do. A few watts of RF can easily become lost in an incorrectly adjusted antenna matching device. The whole idea of a QRP station is to keep things simple and economical, so I cannot overemphasize the priority of a clean, efficient connection of the amplifier output to a resonant antenna.… [by Guy Roels ON6MU]

 

100 Watt RF Power Amplifier for 2 GHz -  Turn an old 1.9 GHz PCS cellular phone basestation into a RF power amplifier.… [Amateur Radio circuits from Green Bay Professional Packet Radio]

 

1000 Watt 300 Volt RF Power Amplifier for 27.12MHz -  Application Note Microsemi-formerly Advanced Power Technology APT9701 …

 

100kHz to1GHz RF Power Detector -  Linear Technology LTC5507) …

 

1-Transistor Amplifier/Detector -  An amplifier may be added to boost the audio level as shown below. The current consumption of this amplifier is quite low and a power switch is not included. Disconnect the battery when the receiver is stored for long periods.… [design by Charles Wenzel]

 

2.3GHz to 432MHz RX converter for Yaesu FT817 -  This very small RX converter fits on the backside (yes the small side at the back) of the Yaesu multiband allmode transceiver FT817. And it even operates on the internal batteries of the transceiver (without modification of the FT817). And it can be configured for either input frequencies around 2320 MHz or for the satellite downlink at 2.4GHz (very interesting for receiving satellite signals from the new phase 3D amateur radio satellite). Design is completed for quite some time, I just have to do the documentation. I will try to publish it asap.… [Herbert Dingfelder's web site]

 

2.45ghz RF Signal Detector -  This passive RF indicator is made from a few simple parts.  A 100uA moving coil meter is used to display the relative intensity of the RF signal.  This circuit can be used with some cell phones and many cordless telephones . . . [Circuit by David Johnson P.E.,  07/09/06]

 

20W VHF Linear Amplifier 2SC1946 50 MHz  -  This VHF linear amplifier works for 50 MHz frequency using 2SC1946A with power output about 20 Watt. It needs input 30mW and output 25W for 150 Mhz. It seems can be used for 144 Mhz without modification. There are Power IC and 2SC1946A with low-pass filter on the board.… [by JO1ACW, June 3, 2002]

 

2-transistor Radio -  Here is a simple radio that was designed to minimize unusual parts; there isn't even a detector diode! The sensitivity isn't as high as the one-transistor reflex but the simplicity is attractive. Strong stations will provide plenty of volume… [design by Charles Wenzel]

 

2W RF Amplifier for 24/23 CM -  This page describes TX ATV Transmitter for 23 cm with output adjustable from 100 to 250mW… [Designer's name not included]

 

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

 

40 meter SSB QRP transceiver -  In 1987 I built this radio. It has been published in a national ham radio magazine, and now finally found its way into the web!… [Manfred Mornhinweg]

 

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

 

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

 

60 Watt RF Amplifier -  Soild state RF power amplifier using IRF840. Simple and easy to construct. IRF840 can handle a maximum power output of 125 Watts.… [Circuit Designer's name is not listed]

 

600 Volt Power Supply -  simple 600 Volt DC power supply. Convert 230V AC to 300V and 600V DC.… [Circuit Designer's name is not listed]

 

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.… [Circuit Designer's name is not listed]

 

807 & 1625 Valves -  data on vacuum tubes 807 and 1625 used in ham radio transmitters. Describes various pin voltages and different operation modes.… [Circuit Designer's name is not listed]

 

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 xperiment with the parts you have on hand. Build this on a ground plane board. Layout is important.… [From Dick Cappels' project pages]

 

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RF (Radio Frequency):  #'s      A-C        D-L       M-R      S-Z


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