These documents provide application ideas for your QRP Labs kits, solutions to common problems, further technical information, etc. Please click "Letter format" for US Letter size (US, Canada) or "A4 format" (rest of the world).
| AN | Title | |||
| AN001 | Frequency drift reduction in the Ultimate3S transmitter | A4 format | Letter format | French translation [2] |
| AN002 | My QTH is many km wrong in the WSPR map – how to fix it! | A4 format | Letter format | |
| AN003 | Controlling additional relays using the Ultimate3S “Aux” | A4 format | Letter format | |
| AN004 | HF PA kit with Ultimate3S transmitter kit | A4 format | Letter format | |
| AN005 | HF PA kit with built-in standalone raised cosine controller | A4 format | Letter format | |
| AN006 | HF low distortion sinewave signal generator, 3 to 30MHz | A4 format | Letter format | French translation [1] |
[1] Many thanks to Michel ON4LAU for the French translation of AN006
[2] Many thanks to Gilles F1BFU for the French translation of AN001