Från club72.su
"It is not often that we get a new operating code in Amateur Radio, and to the best of my knowledge there has never before been one introduced specifically for QRP operators. Some months ago Chairman of the U-QRP Club Oleg Borodin RV3GM suggested that QRP operators adopt the new code 72 meaning Wishing you Good QRP
72 es 73, Gus Taylor G8PG - Chairman of the World QRP Federation (SPRAT # 68)"
/72 de p-a, som alltid kör QRP och använder 72 isf 73...