Build Your Own QRP CW Transceiver Circuits
Find schematics and construction details for low-power CW transceivers, covering various bands and power outputs.
Building a QRP CW transceiver is a rewarding amateur radio activity, allowing operators to make QSOs with minimal power. These low-power rigs, often running 5 watts or less, challenge hams to optimize their antennas and operating skills to achieve DX contacts on various bands. Many operators enjoy the simplicity and efficiency of Morse code, making QRP CW a popular niche for homebrew projects.
This category features a wide range of QRP CW transceiver designs, from simple transmitters like the Michigan Mighty Mite to more complex rigs covering multiple bands. Hams can find schematics and construction details for 80-meter CW transceivers, 40-meter QRP RTX units, and even pocket-sized designs for portable operation. Projects often include details for VXO or crystal-controlled circuits, helping operators build their own equipment for on-air activity.
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Homebrew 20m CW transceiver by MINOWA, Makoto 7N3WVM -
PRC-38S Combat Ready 30 Meter CW Rig Steve Yates - AA5TB -
NN1G 30m 1W QRP transceiver by AA5TB -
GM47: Simple 30m Band QRP CW-Transceiver -
A semi-homebrew QRP CW transceiver project based on the ARK-40 kit, enhanced with a BASIC STAMP BS-II microcontroller for knob-type tuning and an LCD -
A simple 40 meter CW transmitter, it sports full break-in operation and 250 mW of output power. -
VU2VWN project to homebrew a CW for 40 meters band -
This is the schematic of asolid-state 7 MHz QRP CW transmitter by VU2NAN -
Amateur Radio (G3TXQ) - Malta 40 QRP CW Transceiver -
A very quick and easy way to get on the air is to build a "Michigan Mighty Mite" CW transmitter for 160, 80, 40 or 30 meters. It can't get simpler than this. It has very few parts, costs almost nothing, and it works! Cost estimate $10 by VE6WTF -
A SSB CW transceiver for six meters band with schematic and block diagram -
An home made cw transceiver by PA2OHH -
80 metre ceramic resonator VXO CW Transmitter by VK1PK -
An home made FETer QRP transceiver for the 80 meters band -
Crystal-controlled QRP tranceiver by F6BCU for 80 meters band 1W output -
An 80m transceiver using just 14 parts plus crystal and earpiece -
The little QRP presented in this article may be built in a gradual manner, it is divided in two main modules (plus VFO), you may also complete only a single part (RX or TX module). -
Original Tuna-Tin 2 QRP CW transceiver article by W1CER -
2 transistor transceiver for 28MHz CW -
An homemade HF, 6m, 2m SSB CW transceiver project by m0dgq -
10.100 - 10.140 MHz 3 Watts output by 7n3wvm -
7N3WVM homebrew project of a 3 W output CW transceiver on 7 MHz band -
A simple low-power broadcast-type circuit, using a crystal oscillator integrated circuit and an a collector modulated AM oscillator -
A QRP transceiver for 80 meters band by W1FB -
Design for a dual-band CW transceiver using the AD9834 Direct Digital Synthesizer -
The Rock-Mite is a 40m CW kit offered by Small Wonder Labs . It features built-in keyer, direct conversion receiver with a crystal RF bandpass filter, 500 milliwatts of power, and switchable frequency offsets to work around QRM -
Build a 5 watt, 80 meter QRP CW Transceiver Designed by N1HFX -
A 2W 80 meters transceiver assembled into a toaster case. -
This is an experimental CW transceiver for 80m, although the same idea will work on all HF bands -
1-watt 17-meter cw transmitter that was originally done about 10 years ago as a club project for RAMS, the Radio Amateur Megacycle Society. It uses a VXO, rather novel at the time. It also uses a bandpass filter at the output rather than the usual lowpass -
2N2/20 - A 20 Meter, Discrete Component CW Transceiver Built Manhattan-style -
A 30 Meter, Discrete Component CW Transceiver Built Manhattan-style -
A pocket-sized homebrew 40m CW QRPp/QRP transceiver -
The QCX 5W CW Transceiver From QRP Labs, a detailed article describing from the unboxing of the component to the final assembly of the CW QRP Transceiver -
A 40 meter QRP - Transceiver by DL5NEG -
Frequency agile 80 metre CW QRP transmitter. Ceramic resonators vary in the frequency shift obtainable. The one in the prototype of this article gave 3.525 to 3.558 MHz coverage. -
An home made transmitter for 40m CW -
Vasantha VU2VWN VFO controlled 40m Tansmitter schematics -
This page provides a detailed review of the ZB-4, 4 Band CW QRP Transceiver designed for QRP ham radio operations. It includes information on features, performance, and user experience with the ZB-4. The review aims to assist hams in making informed decisions about this transceiver model, highlighting its strengths and potential drawbacks. -
A simple transmitter built into a small cat-food tin! It consists of a single 2N2222 crystal oscillator and runs about 100mw output, depending on the supplied voltage -
Original article was in December, 1986 QST -
This post discusses the Norcal 2N2/XX CW transceiver kit and provides suggestions for minor mods and parts substitutions. The author shares their experience assembling the kit and highlights the simplicity and joy of operating a QRP CW transceiver. The post also includes images and a list of recommended modifications towards the end. If you own or are interested in acquiring a Norcal 2N2/XX kit, this post offers valuable insights and recommendations to enhance your experience as a ham radio operator. -
QRP CW transceiver Kit for 20 or 40 meter band, by OKA Hills Research, assembly history and description -
Homemade portable transceiver for the 40 meters band. -
The 1 watt 20 meter QRP transmitter with VXO. This is a nice QRP transmitter that can be used in combination of one of the simple receivers. -
The requested page for the RockMite QRPp Rig project by WY3A is no longer available on QSL.net, displaying a 404 error. -
A device to allow the transmission of Morse on VHF/UHF FM-only transceivers by VK3YE -
Learn how to build a simple transmitter called the 'Easy Ten' that can be easily heard at a distance of 10 miles using a random length wire antenna thrown into a tree. This article focuses on working with frequencies in the 3.5 and 7 MHz range without the need for complex setups like coax lines or baluns. The author shares their experience of making contacts across the Pacific Ocean and the United States using just one watt of output power and simple antennas. Discover how to optimize signal output using a homemade level meter made from a DC microameter and a germanium diode. -
A circuit for a 5 milliwatts super QRP morse code transceiver by VE2ZAZ -
TenTec 1300-Series QRP CW Transceiver Kits -
MultiPig+ CW Transceiver Kit Construction