FDIM 2018 Builder Challenge!!

Announcing - the FDIM2018 2N2222 POWER 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 undisputable.  QRPARCI is presenting our community with the an opportunity to show off these QRP design skills with the FDIM2018 2N2222 POWER CHALLENGE!  

The challenge is simple:  Design and demonstrate a crystal-controlled 40M PA to make the highest sustained power for a period of one minute using only two 2N2222 transistors.  This event will take place during Friday, May 18 during FDIM, and the winner recognized at the QRPARCI Banquet on Saturday, May 19.

The rules for the competition are simple, but we have to list every nit-picky detail to test your endurance anyway:

  • The design is to utilize two, 2N2222 or 2N2222A transistors as the only active circuit elements.  There are no limits on the number of diodes, inductors, resistors, capacitors, or transformers, but no other transistors, tubes, or ICs may be used.

  • The PA must be crystal controlled within the 40M amateur band.  Builders are encouraged to use their own crystals, though there will be 7030 kHz HC-49 crystals available at the competition.  No external frequency source may be used.

  • The circuit must fit inside a 12” x 12” x 12” volume.  During the power test, the judges will cover the circuit with a blast shield to protect judges and contestants from flying bits!

  • All circuit components are to be visible for inspection.

  • A schematic of the circuit is to be provided with each entry

  • The options for PA cooling are fairly open, but there are restrictions for safety’s sake:  No cooling media may be used that are flammable or could emit harmful vapors when heated.  No closed loop liquid cooling systems may be used. The entire cooling system must be contained within the 12”x12”x12” volume

  • There is no requirement for harmonic purity of the output signal, but consider that these designs might be published in QQ, so don't get stupid.  A 40M harmonic filter will be included as part of the test equipment to prevent harmonic current from affecting power measurement.

  • A zero-to-24v variable power supply, dummy load and power meter will be supplied by the judges.

  • The competition will have two rounds of trials to demonstrate power output of each circuit, with the best performance of each circuit being its final score.  

  • During each test, the builder will connect his circuit, set the power supply voltage and then announce to the judges when to begin measurement.  During a period of one minute in which the builder may not touch the circuit or power supply, the minimum power output registered during the test will be the score for that trial.  Failure of the circuit in that one minute test period results in a score of ZERO for that round!

  • If the circuit fails during the first test period, the builder will have five minutes in which to repair it before the second round trials.  A solder station, simple hand tools and a supply of 2N2222As will be available.

  • If your entry sets off the smoke detector in the Holiday Inn, you will be disqualified and may be subjected to rude laughter and finger pointing during the rest of FDIM!

The winner of the FDIM2018 2N2222A POWER CHALLENGE! will be recognized at the QRPARCI Banquet Saturday May 19, 2018, and a PRIZE awarded! Questions regarding the POWER CHALLENGE may be addressed to David Cripe NM0S, This email address is being protected from spambots. You need JavaScript enabled to view it..  Good luck and good building!

73 Dave NM0S

QRP Amateur Radio Club International

QRP ARCI logo

QRP ARCI is a club for low power enthusiasts worldwide.

We produce a professional quality magazine (QRP Quarterly), organise an annual conference at Dayton ('Four Days In May' or FDIM), and sponsor various QRP contests and awards.

 

Read more...

First BIG13 Award Issued

BIG 13 Award

Our BIG 13 Award is offered to anyone
working 100 QRP ARCI members in 2013


We are pleased to announce that the first BIG 13
has been awarded to Brian Campbell VE3MGY.
Congratulations Brian !

The award encourages members to seek out and work other QRP ARCI members - regular QSOs and contests both count

Details of the BIG 13 can be found in the QRP Operating section

New QRP ARCI publication

Best Of Idea Exchange

QRP ARCI announces the publication of a new book - "The Best of Idea Exchange"

This will quickly become a needed information source for your work bench. The content is drawn from 20 years of the Idea Exchange in past QRP Quarterly magazines.

There are 138 pages of useful information divided into seven sections -

  1. Components
  2. Circuit Design
  3. Test & Measurement
  4. Tools & Techniques
  5. Repairs & Modifications
  6. Antennas
  7. Miscellaneous Ideas

Order your copy online from the QRP ARCI Toystore

QRP Quarterly

QRP Quarterly - Oct 2017


QRP Quarterly - Oct 2017

Technical Articles

  • Idea Exchange—Mike Czuhajewski—WA8MCQ
  • NPOTA Antenna Wrap-up—N2CX
  • Replace Failed HW-8 Mixer Amp with JFET—KC9ON, WB2LHP
  • Lidia Receiver Input Filter Mods—W5USJ
  • Where is My Trap Tuned?—AF7ET

12 Ionospherica—Kazimierz “Kai” Siwiak—KE4PT

14 Let There Be Light—Bob Thompson—K5RWT

14 Old Milwaukee Antenna Mount—John Leonardelli—VE3IPS

16 Flying Saucer Resonators for the HF Bands—Barry A. Booth—W9UCW

21 How Many “UNs” is Enough?—Bob Thompson—K5RWT

24 A Simple QRPWattmeter—Paul Signorelli—WØRW

25 Battery Magic—Bob Thompson—K5RWT

28 Arduino Homebrew Project:

  • AD8307 Power Meter—DuWayne Schmidlkofer—KV4QB

32 NVIS Antenna for QRP Fun on 60M—John Leonardelli—VE3IPS

33 Here We Go Loopy Loop—Howard Zehr—K4LXY

The Joy of QRP

11 How to Copy CW in Your Head—Dan Romanchik—KB6NU

13 Grote Reber, W9GFZ and Radio Astronomy—Ed Breneiser—WA3WSJ

22 QRP in the Mountaineer State—Edward Breneiser—WA3WSJ

26 10 Questions About Your QRP Operations—John Leonardelli—VE3IPS

The World of QRP ARCI

3 Editorial—Mitch Gill—NA7US

4 From the President—Preston Douglas—WJ2V

40 New or Renewal Membership Application

40 QRP ARCI Staff and Directors

 

Sample of QRP QuarterlyTry it free !
Download the
January 2015
issue 

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