Bill Clark - K6WSC

Don Birch - K7NN

Mike Casey - W7TUS



Bruce Betterley - WA1BZQ

Carl Foster - KB7AZ

John Slusser - WD7F






WS7DX #75724



No-Fee Testing
Upgraded the next day!
Hardesty Multi-Service Center

1100 S Alvernon Way
@ E 22nd St
2nd Monday Each Month
7:00 - 7:30 PM Check-In




RFI Representative
Scott Dickerson

TEP Shop

RFI Representative
Dave Walk



The  SADXA meets on the 3rd Thursday  of the month at the located at 6541 E Tanque Verde Rd, Tucson 85715 and the doors open at 5:00 PM. Click on map for directions. 

 You can find WS7DX at too!
>Don't forget:  click on most images to enlarge or link<
The Prez Speaks
The SADXA is an interesting place to come and exchange ideas on operating, equipment, antennas, and especially DX.  We are a welcoming group of active hams who enjoy sharing our love of working DX with others.  We devote a portion of our meetings to the beginning DXer and can extend help when needed.  If you have ever wondered what working DX is all about, please attend one of our meetings and find out.  I hope to see you at the next meeting!


Our Social Director WA1BZQ - Bruce along with our Secretary Treasurer W7TUS - Mike set up a very successful Christmas Party at the Colonia Verde Club House as arranged by  our special XYL - Lillian .   With hors devors provided by our members, Christmas music by N6ITY Dennis and a great catered Italian dinner by , it was a very pleasant evening.  Of course, we had the much anticipated gift exchange hosted by Annette . (Picture is from a past Christmas paty). Everyone had a great time! Check it all out here:

 Next Meeting
17 January 2019
Scheduled Presentation

Our own W7EXG - Bill will be giving a presentation on the "Daytime 40 Meter DX Propogation Corridor" at the January meeting.  Be there or be square!



Last Meeting
20 Decemter 2018  

Our guests for the evening were W6ZQ - Ron and W6IRR - Mary Ann who were celebrating their 43rd Wedding Anniversary.  Congratulations.
KE7ZPT - Elizabeth

SADXA welcomes KE7ZPT - Elizabeth who is a member of the very Radio-Active Family of K7DF - Tom and KE7LHY - Margie.  Elizabeth was celebrating her 10th year as a ham radio operator.

KE7FEX - Bob

And a welcome to KE7FEX - Bob who came to the meeting to see what it's all about.  We hope that you consider joining us, Bob.

  K6WSC - Bill, opened the meeting welcoming our guests for the evening including a new potential member, KE7FEX who says he came to the meeting to see what it was all about.  Bill commented one the successful Christmas Party and turned to our Secretary/Treasurer W7TUS - Mike for a report.  Mike reported that the club is solvent.  He noted that it's a new year for membership and for everyone to please pay their dues.

Bill asked if there was any new business and it was asked if we would be donating to the . It was voted to donate $250 to the Northern California DX Foundation.  

Before turning the meeting over to the membership for the DX Round Table discussion, he mentioned that January is SADXA elections and for everyone to consider running for office.

Time for the
part of the meeting.

W7EXG - Bill reported that W7LB - Larry is at St. Josephs Hospital at Carondelet Dr. and N Wilmot Rd in Tucson . This Hospital is just N of Broadway off Wilmot Rd on East side. He is in Room Number 256. 

OUTPUT impedance of Baluns is not alike.  For example, the output impedance of a 1:1 Balun [from Balun Design], is Inductive with input terminated on 50 or 75 ohms. The output impedance of a 1.5:1 balun (75/50 ohm Balun) (from Balun Design) is capacitive with input terminated on 50 ohms.  Thus, for a fixed dipole element length, the resonant frequency of the dipole using a 1:1 Balun (75 ohm Coax) will be substantially different than for this same dipole element length with the 75/50 ohm balun (50 ohm Coax). BOTTOM LINE: Output impedance of Baluns is important, yet not specified.

On DEC 20-24, the Northern Solar Noon Terminator is about 1090 Mi from the US border. As a result of low ionization over the entire US, the EMUF = 7 MHz boundary is about 2500-3000 miles from the terminator, or located South of most of the US .  As a result, 40m Signals f during the day have condition f >  EMUF, thus signals pass through the E layer to the F DX layer. As a result, 40m Daytime DX is VERY likely and most significantly up to 3-4 hours after Sunrise , and from 3-4 hours before Sunset. Solar Noon 40m DX is challenging due to D absorption, but possible.  

Bill plans a presentation on this subject matter with examples of actual 40m DX paths at the Jan. 17 SADXA meeting. Presentation Title: Daytime 40m DX Propagation Corridor.

W7TUS - Mike said he had been having fun with 100 contacts over the past 3 months with 30 new countries.

K6WSC - Bill worked 18 countries on 80m, 64 countries on 40m, 102 countries on 20m, and 41 countries on 15m in the CQ Worldwide DX CW Contest.

W9FI - Jim worked the   WWCW contest on 160 meters and scored several JA contacts.

KB7AZ - Carl that he's earned a Worked All Zones award.  He has 80 new countries on 40 meters and qualifies for 4-Band DXCC (not an award).  He now has 177 on CW, 204 on Phone and 161 Digital.  He has 9 countries on 160 and 28 on 80.

N6ITY - Dennis finally got his antenna and tower up and has been working some pretty good DX with 21 countries last month. He's been upolading his QSOs to and The disheartning thing is that a neighbor is complaining about the possibility of RF exposure. Go figure!

W0PZD - Dick needs Vermont for WAS on .  He has 30 countries now.

K4HHX - Vince is still working his tower to take his Hex Beam.

KW7CD - Cornell said that the only DX he had worked was Argentina on 20 Meters.

WA1BZQ - Bruce reported that the held a special event on 8 December to honor the USS Arizona and originally intended to set up on the U of A campus , however, due to U of A bureauracy, it was decided that the  would provide the club shack for an operating station.  They made  425 contacts in 6 hours.  Did you work 'em?

K7NN - Don has made 1200 all DX contacts on 60 meters with 101 counties.  He reported that EA8AK - Fernando Fernandez Martin, probably the biggest DXer in Spain had 189 countries on 60 Meter Get busy, Don!

W6ZQ - Ron has worked on 80 thru 10 this summer with his G5RV and a 100 Watts.

AA7FV - Darrell  told of how he had a 20 meter CW schedule with a friend, F5LAW, every Sunday and that they had only missed once in the last 3 months!  The bands are dead, right Darrell?

AC2K - Alan said tht he had a 40 meter dipole at 10 feet off the ground and a 100 Watts working the WWCW with 15 countries, 5 of them African and 350 CW contacts.  He said, quote: "It's good to be back on the air!"

K7NN - Don Prior to the evening's presentation, Don held a drawing for an 2018 Iota Directory and the winner was........AC2K - Alan .  Congratulations to you, Alan.




SADXA Presents

Our presentation by W6ZQ - Ron.   a video about the Naval Radio Transmitter Facility at Laulaualei, Hawaii, where the VLF station NPM is located.  The antenna farm is set on nearly 1800 acres near Honolulu where antennas were built as far back as the early 1900s. There were many types ranging from simple vertical dipoles to complex multi-band rotatable yagis.   The communications site has been very valuable during WW2, Korea, the Cold War and Vietnam. Some of the obsolete antennas have been disassembled.  It was an enjoyable video, thanks for showing it, Ron.


This was the final meeting of the year and you missed it?  You should be ashamed!


Here's our Cowboy for the evening, Buch Cassidy, who did a bang-up job taking care of the group at the meeting here at Pinnacle Peak!  Thanks!


I have added a few additional links below as recommended.  I've received several new pictures of current members, but I'm still short a few as well as the bios.  I suppose it's not absolutely necessary that the page have your bio, privacy issues, you know.  However, after all, this IS an amateur radio organization and Hams like to talk and brag too. Hi, Hi.   I will be bringing my trusty camera to take pictures and I welcome any picture that you might prefer to replace the ones that I post.  Just e-mail a suitable picture to wd7f@wd7f.com

Thanks.  de WD7F - John

PS:  Any other amateur radio links you would like here just for fun?




poppy - 2009



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