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This semi-homebrew QRP (low power) CW transceiver is based on the ARK-40 transceiver kit, by S&S Engineering. With its built-in CW keyer and 5 watts of power, the basic ARK-40 transceiver is an outstanding 40 meter CW performer

An HF QRP CW RTX built around the Arduino open-source electronics prototyping platform

CW transceiver kits, QRP, frequency counters, QRP wattmeters, Dummy loads and QRP Parts

A site devoted to Amateur Radio Homebrewing, CW-decoder, CW QRP Transceiver for the 40 & 20 meters band, CMOS reader

Build a 5 watt, 80 meter QRP CW Transceiver Designed by N1HFX

Amateur Radio (G3TXQ) - Malta 40 QRP CW Transceiver

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).

Small and inexpensive homebrew HF radio 5W Output, CW SSB AM FM, DSP, Speech Processor, Sprectrum Scope, Watefall Display. mcHF is a small, home-brewed amateur radio project. Firmware is released as open source.

Original Tuna-Tin 2 QRP CW transceiver article by W1CER

GM47: Simple 30m Band QRP CW-Transceiver

NN1G 30m 1W QRP transceiver by AA5TB

A circuit for a 5 milliwatts super QRP morse code transceiver by VE2ZAZ

Transverters-Store is a online shop for low cost transverter boards, but also QRP transceivers, Active antennas, RF bridge and probes, Mic equalizers and other amateur radio accessories

An 80m transceiver using just 14 parts plus crystal and earpiece

An home made FETer QRP transceiver for the 80 meters band

A review of the chinese QRP HF transceiver X1M SSB/CW RTX

Amateur radio kits online shop, includes Mini Touch Key, QRP HF SSB and CW transceiver kits

TenTec 1300-Series QRP CW Transceiver Kits

AR5X review of popular CW QRP transceiver kits

Makers of QRP HF General Coverage Transceivers you can build. The Home of BITX transceivers, uBITX General Coverage Receiver-Transmitter. A general coverage, 10 watts HF SSB/CW transceiver kit with features you NEED for operating ease, convenience and versatility. It works from 3 MHz to 30 MHz, with up to 10 watts on SSB and CW, with a very sensitive receiver.

Review of 6 QRP CW transceivers by AE5X published in QST December 2000

An homemade HF, 6m, 2m SSB CW transceiver project by m0dgq

X1M QRP SSB CW HF transceiver by K7JOE

QRP CW transceiver Kit for 20 or 40 meter band, by OKA Hills Research, assembly history and description

The IC703 features a built-in DSP filter and auto ATU as well as speech processing an a CW keyer with 3 message memories. It is an ideal all-in-one ham station for QRPers.

SWL RockMite 40 CW Transceiver Built by WY3A

Assembling the Small Wonder Labs SW+40 QRP Transceiver Kit documented by K4ICY

2N2/20 - A 20 Meter, Discrete Component CW Transceiver Built Manhattan-style

Electronic Kits manufacturer, produce the Penntek TR-45L QRP Transceiver and the TR-25 CW Transceiver Kit

This project is a 40 meter to 6 meter CW "no tune" transverter using ten 2N2222 transistors and one 2N2907. The transverter requires 2 watts of drive from a 40 meter cw transceiver and outputs 2 watts on 6 meters.

Since 2011, crkits offer radio kits that you cannot find on eBay or AliExpress. Includes HT-1A 20/40m Dual Band CW Transceiver Kit, D4D DSB Transceiver Kit for Digital Mode, R3500D ARDF Receiver, CW Transceiver Kit

A 30 Meter, Discrete Component CW Transceiver Built Manhattan-style

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

Elecraft new QRP transceiver, an 80-10 m SSB/CW/Data station that fits in your pocket

The (tr)uSDX is a 5-Band / Mulitmode QRP Transceiver in Pocket Format (90x60x30mm - 140g). It features a highly efficient Class E PA and Supports CW/LSB/USB and AM/FM. Right now it covers 80/60/40/30/20m and in Future there will be support for 17/15/12/10m

A pocket-sized homebrew 40m CW QRPp/QRP transceiver

Manufacturer of the TR-35 4-Band 5-Watt CW Transceiver Kit

For my SOTA activities, i recently bought a QRP transceiver QRP SW-3B, which is a three-band QRP CW only for 40/30/20 m. So, i needed an antenna that would allow to use these 3 bands in SOTA portable activity. Already having some experience with the EFHW antenna, i decided to build one for 40/30/20m.

This article introduces an Arduino-based QRP CW Transceiver designed for lower HF bands. The journey begins with the Wotduino, evolving from a keyer to a multi-mode beacon. The development includes a QRP transmitter and culminates in a receiver inspired by Roy Lewallen design. The transceiver, controlled through a control bus features a signal path, modulation, filtering, and adjustable frequency settings. Despite initial testing intentions, successful QSOs on 80 and 40 meters showcase its functional capabilities.

The SW-3B is a Three-band CW QRP transceiver, Weight 180g, output power 5W at 12v, 2W at 9v, works on 40 30 and 20 meters band

A portable QRP setup based on 20/30/40m QRP CW-only SW-3B transceiver, 2500mAh 5C LiPo battery (147g), Hands Free Nanokeyer

The Homebrew uSDX SDR TRX is an experimental transceiver primarily designed for CW and Digital modes due to limitations in meeting FCC requirements for SSB. Developed from the QRP Labs QCX, it incorporates advanced SDR features while utilizing an 8-bit ATMEGA328P. The µSDX community fosters open-source development with various design streams and versions, encouraging collaboration and sharing among enthusiasts.

The QMX+ Transceiver Kit from QRP Labs is a high-performance, feature-packed 160-6m 5W transceiver designed for hams. This multi-mode kit includes embedded SDR, USB sound card, CAT control, synthesized VFO, RTC, and optional internal GPS. It can be used in CW, digital, and SSB modes, with standalone CW operation, digi mode via USB to PC, or SSB operation. The kit offers standalone beacon functionality and shares firmware with the QMX model. With an optional enclosure, battery-backed RTC, and GPS, the QMX+ is versatile and easy to build, making it ideal for ham radio operators looking for a customizable transceiver kit.

Moto-QRP setups offer compact, weatherproof QRP transceivers for portable ham radio use, ideal for motorcycle and backpack operations. The YouKits HB1A MKII, a 5W CW rig, is paired with a lightweight long-wire antenna and an Elecraft T1 tuner for efficient field communication. This setup fits in panniers, enabling operators to explore parks and remote locations. Accessories include a durable Morse paddle, FCC documentation, and essential logging tools, making it a perfect choice for adventurous QRP enthusiasts.

This article details the design and construction of a compact 20-meter QRP SSB transceiver by Pete Juliano, N6QW, measuring just 2 x 4 x 2 inches—small enough for a shirt pocket. Inspired by a 1963 QST design and refined from a prior version, it employs bilateral circuits, a 4.9152 MHz homebrew crystal filter, switched-crystal VXO for 60 kHz coverage (14.160-14.220 MHz), and standard components like ADE-1L mixers and IRF510 PA for 1W output. Key innovations include a double-sided PCB skeletal frame for shielding and isolation, Vectorboard sub-assemblies, and ultra-miniature relays. The bilateral receiver/transmitter shares stages, omitting AGC for simplicity, while a W3NQN LPF and optional 10W external amp enable DX contacts. Tune-up focuses on crystal matching and bias for linearity. Videos on YouTube demonstrate performance, confirming excellent stability and audio. Total cost nears $100, prioritizing portability over features like CW.

An owner point of view of the Yaesu FT-818 QRP transceiver capable to work HF VHF UHF in CW, AM, LSB, USB, FM, PACKET.

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.

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.