• FDIM 2015 - Four Days In May

    'Four Days In May' is the annual convention of the QRP Amateur Radio Club International. It is held in Dayton OH and runs in parallel with the famous Dayton Hamvention. 
  • FDIM Seminars

    Held on Thursday 14th May 2015. Six presentations from well known names in the QRP community. This event attracts an audience of around 400 QRPers.
  • Hamvention Buses

    Visitors to FDIM have an easy journey to the Dayton Hamvention. On Friday and Saturday we have buses running from the hotel door to the Hamvention entrance.
  • Midnight Mischief

    Midnight Mischief at FDIM 2014 ! Guardians of the Sacred Holy Relic open the arc in preparation for the Tuna-Tin MoJo Ceremony. Yes, really !
  • Buses to Hamvention

    Shuttle buses to the Hamvention on Friday and Saturday ($15 for both days) Wilbur Dahmer will guarantee that you have an entertaining ride to the Hara Arena !
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FDIM Registration

Four Days In May (FDIM) - the biggest and best QRP event in the World !
Held each May, it starts the day before the famous Hamvention in Dayton, Ohio and runs for 4 days

A day of seminars, a Buildathon, a Vendors night, an Evening Lecture, a Pizza Night, a QRP Club night, homebrew competitions, games, music, raffles, door prizes, QRP Hall of Fame induction, a Grand Banquet . . . and buses direct to and from the Hamvention.

Ten-Tec Rebel


Ticket prices have been held at the same rate as the last three years -

        Seminar - $40
        Banquet - $35

Pay with Paypal or credit card using
the online registration form


FDIM Seminars

Thursday 14 May 2015
8.00am - 4.30pm

  • Ken Evans, W4DU (8.00am)
        Welcome to FDIM !
  • Eric Swartz, WA6HHQ
  • Mike Bryce, WB8VGE
        From Rubylith to CAD
  • Glen Popiel, KW5GP
        High adventure with Arduino and QRP
  • George Dobbs, G3RJV
    QRP - A Sideways Look
  • Jay Slough, K4ZLE
    Reflections and Directions
  • Paul Darlington, M0XPD
        Opening The Door : just wide enough

Tea breaks at 10.10am and 3.00pm
Lunch break at 11.30am


Rex Harper, W1REX

Friday 15 May 2015
3.00pm - 8.00pm

Once again the Buildathon will be hosted by Rex Harper W1REX !

This year Buildathon will be held on Friday afternoon/evening. Start time is flexible to cater for those returning from the Hamvention. You can start your project between 3.00pm and 4.30pm. It ends at 8.00pm but will probably continue until everyone has completed their project.

The Buildathon is a group build of a small project that can be completed in around 2 - 3 hours (depending on experience). Beginners are particularly encouraged and there will be plenty of people around to help.

Project details will be announced shortly.

Grand Banquet

Bruna Begali presents a paddle

Saturday 16 May 2015
7.30pm - 10.00pm

The FDIM Grand Banquet is the last major event of the weekend. There's a great meal, a few announcements, the QRP Hall of Fame induction, results of the homebew competitions and then a lot of prize giving !

At FDIM 2014 we  raffled an Elecraft KX3 with a Ham Central Terminal.
And everyone attending was automatically entered in the draw for door prizes which included -

  • two Begali paddles
  • an AlexLoop antenna
  • several Tuna Tin kits
  • an Alpha EzMilitary Antenna
  • two STM32 SDR kits
  • various books
  • choice of Windcamp dipole or 31ft mast
  • a Ham Central Terminal (for KX3)

Prizes are donated thoughout the FDIM event - we usually have more than 50 !


Hamvention Buses

Hamvention Buses

Buses will run from the hotel door to the Hamvention entrance on Friday and Saturday.

This service makes it really easy to get to and from the Hamvention. If you drive you are likely to pay just as much in parking fees and be faced with a long walk to the Hara Arena.

On the outbound route buses will be available from 7.30am until 9.30am. Pickup is at the main entrance of the Holiday Inn.

Return journeys will run from 3.30pm until 5.30pm - your driver will agree a pickup location. Be sure to listen and be at the pickup point no later than 5.30pm

Ticket prices will be confirmed later ($15 in 2013 and 2014). Each ticket will cover outbound/return journeys on both Friday and Saturday.

You can buy your ticket at the hotel during Wednesday evening registration and throughout the Thursday events.

First Time at FDIM ?

Visiting FDIM for the first time ?
Here's a guide so you know what to expect . . .

More about :

Spouse Activities

Stitching at FDIM

For several years we have set aside rooms for spouses to enjoy some non-radio related activities.

More about :

FDIM 2015 Schedule

Venue:  Holiday Inn, Fairborn OH   (map)

 Wednesday 13th May 2015

Registration opens (7.30pm)
Pick up badges and goody bags,
meet old friends and make new ones !

Thursday 14th May 2015

Registration opens (7am)
Seminars (8am - 4.30pm)
         Eric Swartz, WA6HHQ
         George Dobbs, G3RJV
         Jay Slough, K4ZLE
         Mike Bryce, WB8VGE
         Paul Darlington, M0XPD
         Glen Popiel, KW5GP

Vendor Evening (8pm - 10pm)
'Meet the Speakers' (8pm - 10pm)

Friday 15th May 2015

Buses to Hamvention (7.30am - 9.30am)
Buses back to hotel (3.30pm - 5.30pm)

Buildathon (3pm - 8pm)
QRP Club Night (8pm - 10pm)
Show and Tell (8pm - 10pm)
Homebrew Competition (8pm - 10pm)

Saturday 16th May 2015

Buses to Hamvention (7.30am - 9.30am)
Buses back to hotel (3.30pm - 5.30pm)
Grand Banquet, Awards Ceremony
and Door Prizes (7.30pm - 10pm)

Sunday 17th May 2015

Last visit to Hamvention and home

Events and times are subject to change. Please recheck schedule regularly.


Hotel Rooms

Holiday Inn, FairbornAll FDIM activities take place at the Holiday Inn, Fairborn. This is the place to stay to ensure you do not miss any of the action.

We have arranged a special FDIM room rate of $112 per night (+ tax), this includes complimentary breakfast.

This rate is only available by calling the hotel directly (do not call the toll free number !).

Call 937-431-4613 between 8am and 5pm (Monday to Friday). Leave a voice mail if there is no answer.

Tell them you are with 'FDIM' to get the special rate.

Where is FDIM ?