FDIM

For 2026, the FDIM Design Challenge took a different twist – the goal was to demonstrate a 40M QRP transmitter having the highest DC to RF conversion efficiency.  We had […]

The 2026 Four Days In May Homebrew Contest had entries in five categories, and a best In Show award.  Attendees to the Club night were able to view each of

FDIM 2026 Banquet and Hall of Fame Videos

YouTube Collection of FDIM 2026 Symposium Videos

The following individuals and organizations have generously donated prizes for the Four Days in May (FDIM) 2026 event.  We extend our heartfelt thanks to all donors whose contributions make this

The following folks have registered for the 30th Four Days In May event (2026). Missing your QRP ARCI Store receipt? Check your spam folder for mail from Info@QRPARCIStore.com.  If you are

Online registration is now open through Sunday, April 26th: FDIM 2026 Registration For those who are new to the club or have never made the Four Days In May event, it

Harold Smith A Homebrewer’s Journey — How I got to where I am. A QRP Ham’s History. Where I started, how I learned what I learned.  The ups and the downs.

 Among the many virtues which are embodied in the QRP radio hobby is that of economy. While the specific definition of QRP is operation at 5 watts or less, there