Amateur Radio QRP Projects

Friday 18 March 2011

Posted by Unknown at 09:09

The 80/40 Meter Direct Conversion Receiver

The circuit diagram shown in Figure illustrates the schematic for the 80/40 Meter Direct Conversion Receiver. A dipole or suitable anten...
VFO with Ceramic Resonator

A 7 MHz oscillator with a variable crystal oscillator (VXO) operates very stably, but it allows only a small frequency variation (approx. ...
10-M DSB QRP TRANSMITTER WITH VFO

NE602 NE602 The three schematics represent three building blocks for a 10-meter SSB transmitter. Or these blocks can be used separately a...
VWN homebrew QRP TX

VU2JMX@BANGALORE My first homebrew QRP TX was a simple solidstate CW transmitter using SL100, SK100 and BD139 giving about 5Watts on 40 Mt...
40 Meter Homebrew QRP Transmitter

QRP TRANSMITTER - Michigan Mighty Mite! This is my first homebrew hf rig. Its a version of the Michigan Mighty Mite and built for 40 mete...
Half-watt AM transmitter

"The Poppet" is a half-watt AM transmitter designed by Mr. Doug Gibson of England. The original design was published in issu...
25W RF amplifier by BLY88

RF amplifier with 25W of power for 88-108MHz FM transmitters.
Simple 160M Novice transmitter
Mini AM Transmitter
Crystal Oscillators

The circuit below is a standard oscillator of the Colpitts variety. Similar circuits have been used in many ham radio homebrew transmitte...

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