• The Tuna Tin "S" A Bare-Bones Synthesized QRPp Transmitter by Bob Fontana AK3Y December 2020 QST and September 2022 QST
• 6M SDR Transceiver construction guide by James Forkin WA3TFS March 2019 QST. Original article.
• 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.
• 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 level
• An Optimized QRP Transceiver for 7 MHz
  ARRL Handbook 1993, pp. 30-37 to 30-40
  Optimized Options
  Here is a rig that provides a real challenge for the QRP home builder. 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 transceiver covers 18, 21 and 24 MHz, and includes sidetone, spotting and relay-less full break-in --- all on one circuit board!
• 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 CB Slider 
  QST March 1977, pp. 15-17
  Would you like to operate the Tuna Tin Two but not crazy about crystal control?
  
• 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.
• 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!
• 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 rig.
  Feedback: QST September 1996, p. 76 (included above)

 Back to the Future The Tuna Tin 2
Information on how to build a modern replica of the Tuna Tin 2

Peter VK3YE has QRP construction projects on his web site.