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500w HF Linear Amplifier - (electronic circuit added 7/03) |
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500W, Class E 27.12 MHz Amplifier Using A Single Plastic MOSFET -
Application Note Microsemi-formerly Advanced Power Technology APT9903 (
app note added 2/07) |
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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.
(added 9/04). |
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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. (added 6/06) |
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807 & 1625 Valves - data on vacuum tubes 807) and 1625 used in ham radio
transmitters. Describes various pin voltages and different operation modes. .
(added 9/04) |
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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..(schematic / circuit added 6/07) |
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A 300W MOSFET Linear Amplifier for 50 MHz - Application Note Microsemi-formerly
Advanced Power Technology APT9802 ( app note added 2/07) |
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A 50 Mhz, 250w Amplifier Using Push-Pull Arf448a/B - Application Note
Microsemi-formerly Advanced Power Technology APT9702A ( app note added
2/07) |
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A High-Efficiency 400 Watt 13.56 MHz RF Power Amplifier - Application Note
Microsemi formerly Advanced Power APT9501(added 1/07) |
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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, ...(schematic / circuit
added 6/08) |
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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 (App Note added
4/08) |
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A Simple Method to Reduce DC Power Consumption in CDMA RF Power Amplifiers
Through the LMV225 & an Efficient Switcher - National Semiconductor
Application Note (app note added 6/06) |
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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...(added 6/07) |
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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 (app note added 6/06) |
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AN-543: High Quality, All-Digital RF Frequency Modulation Generation with the
ADSP-2181 & the AD9850 DDS - AN-543-Analog Device Application Notes
(app note added 6/06) |
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AN-60-008 Operating precautions for RF Amplifiers - Application Note
MiniCircuits.com (app note added 2/06) |
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Battery operated FM rebroADCast transmitter - (circuit added 6/07) |
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BroADCast-Band RF Amplifier - (Tony van Roon's circuit added 9/04) |
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Capabilities Of Low-Cost High Voltage RF Power MOSFETs At Hf & Vhf -
Application Note Microsemi-formerly Advanced Power Technology APTB981 (
app note added 2/07) |
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CMOS Logic Inverter Amplifier Characteristics - This chart shows some of
the measured characteristics of three different unbuffered CMOS logic gates,
used as voltage amplifiers. (added 12/04) ….(designed by David A.
Johnson) |
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Controlling TDMA Timeslot Power Levels using the Esg-D Series, RF Signal
Generators - Aligent App Note (app note added 6/07) |
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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. This amplifier (electronic Circuit / Schematic added
10/04) |
