"HappyHolidays TRX" - Vier banden VXO afgestemde 1 watt QRP CW trx door PA2OHH
Een simpele degelijke transceiver voor de vakantie. Met deze simpele QRP transceiver is meer mogelijk dan je zou denken. Probeer het gewoon eens maar geef het niet te snel op!
http://www.qsl.net/pa2ohh/fourbndnl.htm

"HIS TRX" voor in de rugzak! door PA2OHH
Hij is ontworpen voor de rugzak tourist op blote voeten. Op blote voeten, want zijn levensstijl is Back to Basics en daar past de HIS transceiver prima bij. HIS is namelijk de afkorting voor Hij Is Simpel!
http://www.qsl.net/pa2ohh/2bndnl.htm

"MY TRX" All band CW transceiver 5 watt QRP door PA2OHH
Hier wordt een all band CW transceiver beschreven die ondanks dat toch nog vrij eenvoudig is. De transceiver heeft een bereik van maar liefst 1.8 MHz tot 30 MHz en de prestaties zijn zeker niet slecht.
http://www.qsl.net/pa2ohh/01trxnl.htm

An experimental DSB/CW QRP rig for 20 and 40 meter bands by IK3OIL
The building of an HF phone rig today isn't shurely a simple job, however I'd like to propose an easy-tomake project, suited for portable or emergency use.
http://www.ik3oil.it/_private/QRP%20sperimentale%20in%20DSB_eng.pdf

BIGODE - A RX, TX, TRX QRPp QRP for beginners by PY2OHH
This project is in homage to the colleague SK PY1AFA, GIL (Gilberto Affonso Penna) was director of our main Ham magazine. The name MUSTACHE (BIGODE) is because the Gil exhibited a great mustache.
https://www.qsl.net/py2ohh/trx/bigode/bigode1/begode1.htm

BIGODE Multibanda - Um TRX CW 4W para 20, 15 e 10m by PY2OHH
Continuing our assemblies with the BIGODE, we showt here the triband version.
The choice of the bands was in function of the antenna that we have at the moment and had been 3 bands due the amount of keys 2 poles 2 positions to be used.
https://www.qsl.net/py2ohh/trx/bigodemulti/bigodemulti.htm

Homebrew CW Rig by ZL2CTM
Please see the YouTube videos for an explanation on the code and circuits.
https://zl2ctm.blogspot.com/2020/03/cw-rig.html

MOSQUITO MinimalistTransceiver by EA3FXF & EA3GHS
The main motivation of this new design is use a inexpensive high-power high­frequency MOS transistor like the IRF510.
http://ea3ghs.qrp.cat/mosquito.pdf

Portable QRP Multi-band CW TRX by DM3MAT
Here, I like to present my small portable QRP CW TRX, that I frequently use at home as well as outdoors, e.g. on bicycle tours. Hence the design constraints were: small size and light weight, low power consumption, CW QRP rig and at least 3 bands.
https://dm3mat.darc.de/cw2019/cwtrx.png

The NorCal Sierra: An 80-15 M CW Transceiver
Most home-built QRP transceivers cover a single band, for good reason: complexity of the circuit and physical layout can increase dramatically when two or more bands are covered.
http://www.arrl.org/files/file/Technology/tis/info/pdf/96hb1789.pdf

Tiny Tornado QRP Transceiver by KC6WDK
Here is a novelty 1-watt CW transceiver developed by KA8MAV that evolved from the"Pixie 2" and by just changing the output filter can be built for any band.
https://www.qsl.net/kc6wdk/QRP/tornado.htm

Vier Banden CW Transceiver door PA2OHH
De prestaties van de 80 meter CW transceiver met de enkelzijband directe conversie ontvanger volgens het fase principe zijn zo goed dat ik dit ook eens voor andere, hogere banden wilde uitproberen.
http://www.qsl.net/pa2ohh/99trxnl.htm

Wall Wart Powered "Joneset" Transceiver by K5BCQ
My criteria was: - Basic single tube (dual triode) Frank Jones "One Tuber" design point from 1935 for the receiver, but add an RF amp for isolation to prevent uneccessary radiation.
http://www.qsl.net/k5bcq/REGEN2/regen1.html