FDIM 2023 Speakers List

Four Days In May (FDIM) - the biggest and best QRP event in the World !

FDIM will be held at the Holiday Inn Fairborn Ohio.

MAY 18 2023 

0900  Jerry Wolczansky KI4IO - Building an all analog phasing transceiver for 40 meters CW
1000  Rick Campbell KK7B and Ana Rugani K7XNA - Hidden Transmitter and Interference Hunting
1100  George Heron N2APB and Pete Eaton WB9FLW - How Low Can You Go? - A Modern Coherent CW Transceiver for Weak Signal Communications
1200  Lunch
1300  Greg Latta AA8V - Aluminum Chassis Construction
1400  Adam Kimmerley K6ARK - Extreme, yet Practical HF Antennas for Portable Ops
1500  Ashhar Farhan VU2ESE - A VHF radio for the field
1600  Hans Summers G0UPL - Evolution in Radio Design: building the next generation
Looks like a great lineup of presenters!  Don't forget to get registered. 


FDIM 2023 Receiver Challenge

Announcing - the FDIM 2023 Minimalist Receiver Challenge

We QRP enthusiasts have developed a great reputation for doing more with less. Whether that is trying to break a record for mile per watt in a QSO, or designing a transceiver with fewest components, the design skills of our colleagues is indisputable. QRP ARCI is presenting our community with an opportunity to show off these QRP design skills with the FDIM2023 MINIMALIST RECEIVER CHALLENGE!


Schedule for FDIM 2023

All times are Eastern Daylight Time (UTC -4)

Wednesday May 17 - Registration from 7:30PM to 9:30PM 

Thursday May 18 - Registration starts at 7:30AM Outside the Ballroom

Make sure you pick up your FDIM badge from the registration table

Thursday May 18 - Seminars

Beginning at 9AM and breaking at 10:45AM

Restarting at 11:00AM 

Lunch is from Noon to 1:00PM

Restarting at 1:00PM and ending at 5:00PM

7PM to 8PM - Vendor registration and setup - Main Ballroom, no public access

8PM to 10PM - Vendor Night

Friday May 19th

7PM to 8PM - Club Registration and setup in the Main Ballroom, no public access

7PM to 8PM - Show and Tell Homebrew Contest Registration and setup in Ballroom

8PM to 9PM - Homebrew Contest Judging in the Ballroom

8PM to 10PM - Radio Show and Tell in the Ballroom

8PM to 10PM - Receiver Challenge

8PM to 10Pm - Club Night in the Ballroom

Saturday May 20th 

7PM - Awards Ceremony and Grand Banquet in Ballroom 

9PM - Post Banquet Chat Sessions, bring your QSL cards to trade

Sunday May 21st 

Hamvention and head back home

If you have any questions please let us know !

FDIM Registration 2023

Four Days In May (FDIM) - the biggest and best QRP event in the World !

FDIM will be held at the same location as last year,

Holiday Inn Fairborn.

2800 Presidential Drive, Fairborn, OH, 45324, US

MAY 18 - May 21 2023

This year you will need to register for rooms directly with Holiday Inn via this URL

Holiday Inn Fairborn FDIM Registration

Cost is $169 per night, three night minimum is required. Room ONLY. 

If you have trouble with the link, call the Inn at 937-426-7800 and ask for the FDIM discount. 

DO NOT PAY QRP-ARCI for your Hotel Room

Below is the pricing for 2023 FDIM

Banquet - $40.00 per person

Symposium with Proceedings Book  - $35.00 per person 

Proceedings Book - $15.00 per book

Zoom Only Link - $12.00 per person

Send your payment via paypal to  This email address is being protected from spambots. You need JavaScript enabled to view it. - Please list what you are buying in the comments of the order. 

DO NOT PAY QRP-ARCI for your Hotel Room 


Door prizes!!

DX Engineering has agreed to donate a Yaesu FT-817 with a LDG Z-817 tuner! 

MFJ has agreed to donate several pieces of equipment!

Icom America has donated an IC-705! 

A set of Begali Paddles have been donated! 

Stay tuned for more updates