• FDIM 2017 - 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. May 18, 19, 20, 21 2017.
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FDIM Registration


Be sure to press return to MERCHANT when finished with PayPal

Want to fill out a paper registration and mail a check click   HERE


We have arrangements with 3 facilities.  Follow the instructions and links in your FDIM registration email.

Rooms will be held for FDIM registered guests at the discounted rate until March 1st.  At that time rooms will be offered at the discounted rate, subject to availability, to QRP-ARCI Members.

1. Holiday Inn Fairborn $144.00 SOLD OUT 2800 Presidential Drive | Fairborn, OH 45324

The Homewood Suites and Fairfield Inn will take online reservations at the links listed on your registration receipt. They recommend using the links as they are created for QRPARCI.
2. Homewood Suites Fairborn $219.00 2750 Presidential Dr., Fairborn, Ohio, 45324, USA TEL: +1-937-429-0600

3. Fairfield Inn Dayton North $139.00 6960 Miller Lane Dayton OH 45414 Fairfield Inn is offering shuttle service to/from the Holiday Inn Dayton Fairborn.  Their shuttle services the Dayton International Airport but they can schedule daily runs from the Fairfield Inn Dayton North to the Holiday Inn for our guests.


Your FDIM TEAM continues to research available  rooms in the area.  We will post newly found locations here.

Rooms will be in short supply this year as a result of the relocation of Hamvention.  We suggest early registration for both FDIM and your rooms.

Registration will be open long before we have made final plans for programs and other activities at the FDIM site.  Details will be available on the QRPARCI.org web site as soon as they are completed.

Hope to see you at FDIM 2017 

Questions, send me a note

This email address is being protected from spambots. You need JavaScript enabled to view it.

Norm Schklar, WA4ZXV, FDIM 2017 Chair


 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, a QRP Club night, homebrew competitions, games, music, raffles, door prizes, QRP Hall of Fame induction, a Grand Banquet.

Questions, contact This email address is being protected from spambots. You need JavaScript enabled to view it. 

FDIM Seminars 2017

Preliminary FDIM Seminar Presenters for Thursday 18 May 2017  
Not in presentation order.

  • Jack Purdum W8TEE "Giving Your Rig a Face Lift"
  • Mike Bryce WB8VGE "Radio repair, tips, technics, and problems"
  • Howard Zehr K4LXY
    "Here we go loopty loop - practical magnetic loop antennas for the frugal QRPer"
  • Doug Hendricks KI6DS "The History of QRP from a Norcal Perspective"
  • Dave Cripe NM0S "Building the Next Generation"
  • George Heron N2APB and Joe Everhart N2CX
    "A GPS-Disciplined Oscillator for the Modern Ham Station"

FDIM 2017 Buildathon

Rex Harper, W1REX

Friday 19 May 2017
4.00pm - 8.00pm

Once again THANKS to Rex Harper W1REX for hosting the FDIM Buildathon !

Due to all the latest interest in FT-243 crystals and crystal grinding, I have decided to update the workshop that was presented by myself, W1REX, Darell Brehm, WA4OPY, and Ron Hale, AC5UR at the Ozarkcon 2006 QRP convention. We held a hands on workshop where everyone ripped open an out of band surplus FT243 crystal, removed the quartz blank and re-ground it to a QRP friendly frequency. That workshop was focused on the crystal grinding. The FDIM 2017 Buildathon will add a kit to the process. we will first build an integrated crystal oscillator and frequency counter, calibrate it and then grind an FT-243 crystal from somewhere in the 6.x Mhz region to a desired 40m frequency. I will provide a genuine factory OLD FT-243 crystal within grinding distance of the 40m band as part of the Buildathon package.

As usual, the Buildathon will also include a time out for a complementary pizza party so that builders won't miss dinner while we build. Directly after the Buildathon, the now sated builders only need to take a short walk around the lobby in order to enjoy the FDIM Club night being held in the adjacent ballroom.

We will be using the *USUAL* format of the Buildathon so we can register 35 builders.... Don't wait until the last minute to sign up! After that, you will just have to resort to picking up your kit at the FDIM Buildathon and taking it home.....


Registration for the Buildathon is completed with Rex.  


Check the FDIM Section of the web site for more FDIM info. http://qrparci.org/fdim


Vendor Night

Vendor table at FDIM

Thursday 18 May 2017
8.00pm - 10.00pm

Vendor Night is free of charge !

Vendors and QRP clubs from around the World will be selling kits, components, antennas and all kinds of goodies.

This is a great place to buy. The vendors have time to chat and you can take your purchases back to the hotel room. For customers, doors open at 8.00pm

Vendors at FDIM 2016 included -

  • Brad Thompson, AA1IP
  • Elecraft
  • Dan Romanchik, KB6NU
  • DX Engineering
  • Four State QRP Group (4SQRP)
  • Kanga UK
  • Kanga USA
  • LNR Precision
  • Pro Audio Engineering
  • QRPme

Book a Table

QRP Club Night

Club Night Button

Friday 19 May 2017
8.00pm - 10.00pm

QRP Club Night is free of charge !

A night of fun, games and socialising. We tried this the last three years and it was a great success.

QRP Clubs and groups will have a table to promote themselves. Tables can be decorated with flags and banners. Flyers and badges can be distributed - and new members recruited.

Each Club can make their table 'their own' but we suggest that some snacks/nibbles/sweets from their area are provided and some kind of game or competition is hosted (think along the lines of toroid winding and left footed CW).

Please - find out who is the lead person for this from your own club. If no one is doing it, then take the lead yourself and contact your fellow club/group members !

Clubs at FDIM 2016 -

  • Austin TX QRP Club
  • Four State QRP Group (4SQRP)
  • Lafayette QRP Group

First Time at FDIM ?

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

More about :

FDIM 2017 - 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. May 18, 19, 20, 21 2017.