SFDXA authors and presenters are pleased to make their many presentations and publications available to the Amateur Radio community.


Enjoy them, but if you use them publicly, please cite the Date, Title, Author, Call Sign, and The SFDXA

Our authors have also posted their articles that appeared in QST, QEX, QRP-Quarterly, CQ, and other journals. 

Those articles are subject to the respective copyrights, please use accordingly.

Thanks and 73!




Click on the Title



10 July 2019

Near Vertical Incidence Skywave (NVIS) Propagation with an ARES Slant

Presented by "Gil" Gillinghan, W1RG

1 May 2019

Hurricane Recovery with NF4A  -  HamNation #388

Introduced by Pete Rimmel, N8PR

26 Mar 2019

New Zealand Adventure: Redux 2018 [to GCARA]

Kai Siwiak, KE4PT

6 Mar 2019


Randy Shirley, N4QV

2 Jan 2019

The Sun and Cycle 25

Pete Rimmel, N8PR

7 Nov 2018

N4II Dalmation Plantation Antenna Farm Design

Ed Callaway, N4II

5 Sep 2018

Battery Technology and Amateur Radio

Tony Gawel, W6TNY

11 July 2018

FT8 - a new WSJT-X mode

Randy Shirley, N4QV

2 May 2018

Live Trees Affect Antenna Performance

Kai Siwiak, KE4PT

7 Mar 2018

The ARRL RF Safety Committee

Kai Siwiak, KE4PT

3 Jan 2018

The-CW-Advantage and Introducing-CW-Academy

Jim M. Talens, N3JT, and John R. Silva, N3AM

26 Sep 2017

Ham Software for Digital Modes and HF Propagation Prediction [rev2:2018-Apr]

Kai Siwiak, KE4PT

1 May 2017

DXing Software & Planning
for a QRP Adventure

Kai Siwiak, KE4PT

1 Mar 2017

ARRL OO Program

Al Flapan, KN4FA

24 Jan 2017

Multi-band Antenna Strategies for EmComm - to GCARA

Kai Siwiak, KE4PT

4 Jan 2017

The eQSL System and Awards

Dave Morris, N9UF

2 Nov 2016

To Balun or not to Balun

Rich, W4RQ & Kai  KE4PT

Nov 2016

QRP-Quarterly: Ionospherica-8 - Antenna patterns with a calculator

Kai Siwiak, KE4PT

7 Sep 2016

3-D Printing for Amateur Radio

Don Drennon, N4TZH

6 Jul 2016Lightning! Part-2 protect your radio equipmentJohn Stucka, N3JM
4 May 2016Intrepid DX South Sandwich and South Georgia Expeditions, slidesNorm Alexander, W4QN
2 May 2016ANTENNAS – Wires, Verticals and Arrays - presented to DCARC
Pete Rimmel, N8PR

Apr 2016

QRP-Quarterly: Ionospherica-VII - Propagation over Rough Earth

Kai Siwiak, KE4PT

2 Mar 2016DX aides -  Past and PresentNorm Alexander, W4QN

Feb 2016

QST: Radio Wave Propagation-How Waves Attenuate with Distance

Kai Siwiak, KE4PT

6 Jan 2016Lightning!John Stucka, N3JM
4 Nov 2015Video report, Ham Radio Now-2015:
Dayton DX Forum Part 3 - K1N Navassa
Pete Rimmel, N8PR
4 Nov 2015Video by Pete, N8PR,
FT5ZM DXpedition Pileup - 1/14

Pete Rimmel, N8PR

27 Oct 2015

Propagation - It's not always FreeSpace [to GCARA]

Kai Siwiak, KE4PT

Oct 2015

QRP-Quarterly: Ionospherica-VI - Propagation from the Ground Up

Kai Siwiak, KE4PT

Oct 2015Using Digital Modes on the Fly: Checklists  [to QCWA and DCARC]Kai Siwiak, KE4PT
2 Sept 2015ZF2EM DXpedition report Pete Rimmel, N8PR
2 Sept 2015OZ1AA-NA-bike-trek reportPete Rimmel, N8PR

8 July 2015

Landline and Radio Telegraphy  History and Exhibit.

Robert Feeny, KG4UGG

26 May 2015Amateur Digital Modes the Easy Way
[to GCARA]
Kai Siwiak, KE4PT

6 May 2015

Update: “Amateur Radio at the National Hurricane Center WX4NHC”

Julio Ripoll, WD4R

Apr 2015

QRP-Quarterly: Ionospherica-V - Urban Propagation

Kai Siwiak, KE4PT

9 Mar 2015

Grayline Propagation, or FLCocos Keeling on 80m - WWROF webinar

Ed Callaway, N4II

5 Mar 2015

DXlab Logging Software   and  
Report on CQ DX Marathon

Norm Alexander, W4QN

30 Jan 2015

JT65: DXing with Joe Taylor - SFDXA Forum, Miami Hamfest

Pete Rimmel, N8PR

7 Jan 2015

A New Zealand QRP Adventure

Kai Siwiak, KE4PT

7 Jan 2015

W1AW/4 at N8PR: Station & RTTY operations

Pete Rimmel, N8PR

Oct 2014

QRP-Quarterly: Ionospherica-IV - loop near fields

Kai Siwiak, KE4PT

3 Sept 2014

ARRL Centennial Report and
WRTC report

Pete Rimmel, N8PR 

3 Sept 2014

2005-2006 Operation from Iraq

Carlos Vega, N4THW 

Sept 2014

First ever EME operation from US Virgin Islands - QST September 2014

Pete Rimmel, N8PR, and Bill Druzilla, NZ5N

15 July 2014

Broward County ARES/RACES meeting; Improvised Antennas for Emergencies

Kai Siwiak, KE4PT

9 July 2014

Out of this World Antenna Measurements

Kai Siwiak, KE4PT

9 July 2014

Scouting and Ham Radio

Shelly Weil, K2BS

9 July 2014

Status of Trans-Atlantic 2 m Quest

Sebastian Acosta, W4AS

7 May 2014

Hi Performance RX Antenna for a Small Lot

Carlos DaSilva, N4IS

Apr 2014

QRP-Quarterly: Ionospherica-III - Hiker dipole

Kai Siwiak, KE4PT

5 Mar 2014

W4DN's Photo tour of 2014 Miami Hamboree

Don Drennon, N4TZH

5 Mar 2014

ARRL at 100 - A century of Ham Radio, Video


1 Feb 2014

WRTC-2014 presentation: Miami Hamboree

Dan Street, K1TO

8 Jan 2014

Solar magnetism, wind, sunspots,  Auroras

Pete Rimmel, N8PR

8 Jan 2014

Two months of solar activity

Rich Rosen, K2RR

Dec 2013

QST: How Much “Punch” Can You Get from Different Modes?

Kai Siwiak, KE4PT, and Bruce Pontius, N0ADL

8 Nov 2013


Sebastian Acosta, W4AS

8 Nov 2013

Remote Base Operation: RemoteShack

John Troy, KI4YUM

Oct 2013

QRP-Quarterly: Ionospherica-II - Wave-interference

Kai Siwiak, KE4PT

4 Sep 2013

80m Grayline Propagation:  FLCocos Keeling

Ed Callaway, N4II

10 Jul 2013

Inside: Decommissioned VOA, Delano CA

Rich Rosen, K2RR

1 May 2013

Antenna Support Structures

Mickey Baker, N4MB

Apr 2013

QRP-Quarterly: Ionospherica - The Big Solar Picture

Kai Siwiak, KE4PT

6 Mar 2013

Running Your First CQ DX

Mike Raskin, W4UM

9 Jan 2013

Easy Digi Easy RTTY

Kai Siwiak, KE4PT

7 Nov 2012

Video: DXpeditions of the year 1993-2007

Bob Allphin, K4UEE

11 Jul 2012

Photos and news: Dayton 2012 Hamfest

Don Drennon, N4TZH

11 Jul 2012

Experiences of ARRL and W1AW visit

Pete Rimmel, N8PR

Jul 2012

QRP-Quarterly: Loop antenna efficiency

Kai, KE4PT, and Amir, K9CHP

2 May 2012

Video: Virtual tour of ARRL HQ

David Fowler, K4DLF

Apr 2012

QRP-Quarterly: KE4PT Off-Center-End-Fed dipole and DX go bag station  also: OCEF ADDENDUM

Kai Siwiak, KE4PT

7 Mar 2012

Antenna Modeling comparison of EZNEC & NECWIN+

Norm Alexander, W4QN

4 Jan 2012

Software defined radios.

Sebastian Acosta, W4AS

2 Nov 2011

Tower Safety, Coax & RF Fittings, Network Analyzers

Mark Lavallee, AC4UV

8 Oct 2011

Dinner and Presentation on DX his activities

Vladimir Bykov, UA4WHX

7 Sep 2011

1. “Amateur Radio at the National Hurricane Center WX4NHC”

2. “WX4NHC Haiti Earthquake mission”

Julio Ripoll, WD4R

12 Jul 2011

Lightning Strike and EMP at KE4PT

Kai Siwiak, KE4PT

6 Jul 2011

Presentation on Dayton 2011 Hamfest

Steve Romagni, W4DTA

4 May 2011

The Ins and Outs of eQSL.cc

Dave Morris, N9UF

2 Mar 2011

Working the Easy Sats

Bill Rafus, KD4FRB

2 Mar 2011

Working DX from Satellites

Bill Dzurilla, NZ5N

5 Jan 2011

Video: K4M Midway Atoll 2009


Nov 2010

Enjoy DXing with a Modest Station in CQ DX Marathon

Kai Siwiak, KE4PT

5 May 2004

Making a Low Band (160 m) Loop

Pete Rimmel, N8PR