- An Updated Universal QRP Transmitter Errata
QST April, 2006
Looking for a project that will let you try some of your own "scratch built” ideas? Here is a starter low power transmitter circuit for that pursuit.
- The MRX-40 Mini Receiver (advanced)
QST September 1997, pp. 59-60
A tiny 40 meter amateur band Morse code receiver barely larger than a half dollar.
- Rescaling the MRX-40 Receiver for 80 Meters
QST May 2001, pp. 98-99
Feedback: Rescaling the MRX-40 Receiver for 80 Meters
QST Jul 2001, p. 31
- An Automatic Sealed-Lead-Acid Battery Charger
QST May 2001, pp. 43-47
Neat little charger that not only charges your Sealed Lead Acid batteries, but can keep them on trickle charge safely.
- The NJQRP Squirt
QST April 2001, pp. 40-43
A reduced-size 80-meter antenna designed for small lots, portable use, and a fine companion for QRP or the Warbler PSK31 Transceiver .
- A Simple 10-Meter QRP Transmitter
QST March 2000, pp. 43-46
Take advantage of this 10-meter/QRP combo to get more miles per watt!
- Some QRP-Transmitter Design Tips
QST February 1988. Pp. 30-32
Full QSK is beneficial during QRP CW work. It is easy to achieve without relays at low power levels.
- Four Watt, QSK, for 24.9 MHz
QST February 1986, pp. 23-26
Here's your chance to try the 24.9-MHz WARC band at minimum cost. This transmitter is a fine mate for the 24.9-MHz converter described in April 1985 QST.
- A Two-Transistor Transmitter for 30 meters
QST February 1984, pp. 46-47, Hints and Kinks
- An Optimized QRP Transceiver for 7 MHz
ARRL Handbook 1993, pp. 30-37 to 30-40
Here is a rig that provides a real challenge for the QRP home builder. Nonetheless, this is a classic circuit and a favorite in the QRP community.
- A QRP SSB/CW Transceiver for 14MHz -- Part 1
QST December 1989, pp. 18-21
Exotic circuitry and hard to find components aren't necessary if you want to build excellent performance into a home-brew SSB/CW transceiver: Careful design is the key.
- A QRP SSB/CW Transceiver for 14MHz -- Part 2
QST January 1990, pp. 28-31
W7ZOI rounds out his description of a 1- or 10-W SSB/CW rig with details on its transmitter, TR switching and optional speech processor.
- The QRP Three-Bander
QST October 1989, pp. 25-30
This low-power, direct-conversion CW trnsceiver covers 18, 21 and 24 MHz, and includes sidetone, spotting and relay-less full break-in --- all on one circuit board!
- A Balanced QRP Transmatch
ARRL Handbook, 1990, pp. 34-19 to 34-20
- Build A Tuna-Tin 2
QST May 1976, pp. 14-16
Ham radio lost its kick? Go QRP with this weekend project transmitter! WAS with a 40-meter half-watter? You betcha!
- The Tuna Tin 2 Today
QST March 2000, pp. 37-40
The revival of a legend
Note: the TT2 Kit is now available from the Ft Smith QRP Group.
Contact Jay Bromley W5JAY for details ( firstname.lastname@example.org )
- The CB Slider
QST March 1977, pp. 15-17
Would you like to operate the Tuna Tin Two but not crazy about crystal control? Heres the answer.
- The NORCAL SIERRA: An 80-15 Meter CW Transceiver
ARRL Handbook 1996, pp. 17.89-17.95
This project is available as a complete kit from Wilderness Radio.
Note: Suitable substitutes for C52 can be found at several suppliers.
- A Simple and Accurate QRP Directional Wattmeter
QST February 1990, pp. 19-23, 36
A directional wattmeter that's simple, portable, and accurate from 10 watts down to 5 milliwatts!
- The Miracle Whip: A Multiband QRP Antenna
QST July 2001, pp. 32-35
A small portable and inexpensive to make.
- QRP-France with a "Junk Box Shorty Forty" Antenna
QST July 2001, pp. 66-68
A short center-loaded 40-meter dipole for portable QRP
- Updating the W1FB 80-Meter "Sardine Sender"
QST November 2001, pp. 54-56
Build a “modern” version of this old classic QRP transmitter.
Feedback: March 2002, p. 42 – The value of capacitors C6, C8, C9 and C12 should be 0.1uF
- A Multimode Phasing Exciter For 1 to 500 MHz
QST April 1993, pp. 27-31
A simple transmitter that generates SSB, CW and more. (a mate to High-Performance, Single-Signal Direct-Conversion Receivers )
- A Small High-Performance CW Transceiver
QST November 1995, pp. 41-46
A full break-in 1 watt output and single-signal direct-conversion 20-meter package the size of a 35mm camera
Feedback: QST September 1996, p. 76 (included above)
- The AMQRP club web page features a whole slew of downloadable construction projects.
- QRP HomeBuilder Software
Presented on this page is software for use in designing and building your QRP and homebrew projects. This 32-bit software is for users of Microsoft Windows 95, 98 and NT 4.0-5.0 (tm) operating systems.
- Back to the Future The Tuna Tin 2
Information on how to build a modern replica of the Tuna Tin 2
- QRP Builder Homepage
These web pages were designed for hams who wish to build and operate low power radio equipment on the amateur radio bands.