DFMA Repeaters

147.225+ PL:82.5
224.260 -
443.1375+ DMR

TV Hill
145.450 - PL:82.5
444.100+ PL:82.5

VA Hospital
444.450+ PL:100.0

[more repeater info]


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Upcoming Events

Wed Mar 29 @ 6:05AM - 07:15AM
PT Net - Rhett, KE4HIH, ncs
Thu Mar 30 @ 6:05AM - 07:15AM
PT Net - Bob, W4RWC, ncs
Thu Mar 30 @ 8:00PM - 09:00PM
Fri Mar 31 @ 6:05AM - 07:15AM
PT Net - Bob, W4RWC, ncs
Fri Mar 31 @ 8:30PM - 09:30PM
6m FM Net, K4WCV, ncs
Mon Apr 03 @ 6:05AM - 07:15AM
PT Net - Rhett, KE4HIH, ncs
Welcome to the Durham FM Association
Dan Whitehead, KK4DMS sk Print E-mail
Written by KU4GC   
Monday, 25 January 2016 14:24

DURHAM-Daniel Whitehead, Jr. of Durham, NC, died unexpectedly at home on Thursday, January 21, 2016. He was 73.

Dan was born August 8, 1942, to Daniel Whitehead, Sr. and his wife, Lenore Ridings. He grew up near Pittsburgh, PA, where he lived until moving to the Orlando Florida area in 1978 and to Durham, NC in 1997.

He is survived by his wife, Lucille, and their three daughters; Jennifer Tracy of Chapel Hill, NC, Polly Judd of Durham, NC, and Elizabeth Burbridge of Roanoke, VA. He also leaves his sisters Barbara Keywood of Roanoke, VA, and Gail Whitehead of Frederick, MD. He has thirteen grandchildren: Sarah, Shannon, Emily, Michael, Bethany and Megan Tracy; Kaylee, Kamryn, Sydney and Gabrielle Judd; and Madison, Katie and Michael Burbridge.

Dan earned a BS in mathematics from Carnegie-Mellon, an MBA from the University of Pittsburgh and a MS in Computer Science from the University of Central Florida. He joined the Marines as a young man and the Navy Reserve later in life, retiring as a Lt. Commander. After retiring from AT&T he was active in ham radio and the Durham COP’s program.

A memorial service will be held at 10 am on Friday, January 29th, at the Church of Jesus Christ of Latter-Day Saints, 1050 Martin Luther King Jr. Blvd, in Chapel Hill.

The Whitehead family is under the care of Hall-Wynne Funeral Service. Online condolences; www.hallwynne.com

(The text above is from the Hall-Wynne Funeral Service web site.)

Dan was very active in the DFMA and was currently a DFMA Board Member, the DFMA’s Hamfest Chair and the Durham County ARES EC and AUXCOMM coordinator.  He was always ready to help.  During Field Day 2014 he stepped in at the last moment to set up the public information table when the person scheduled to do it had a family emergency.  He fulfilled that role again last year.  During DurHamFest 2014 he stepped in and put much time in working at the Club Table.  He was an active VE after earning his Extra Class License last spring.

Licensed in 2012, in the last few years he got very involved in HF.  He earned his W1AW Worked All States in the AARL’s anniversary event in 2014.  He planned to operate in this year’s ARRL-National Park Service event and had assembled a mobile HF station for that purpose.

Last Updated on Monday, 15 February 2016 18:51
Jan 5 Program: DMR - Digital Mobile Radio Print E-mail
Written by KU4GC   
Thursday, 31 December 2015 10:34

Charlie Durst, NC4CD, will present a program on Digital Mobile Radio.  He reports: "Amateur radio has gone from spark gap to cw to voice via amplitude modulation and then single sideband.  Hams also began to convert business band radios to the ham hands to use frequency modulation and repeaters.  Along the way digital modes got their start with teletype machines, tnc’s, and many variations, all for data transmission.  Now we have technologies for digital voice transmission.  DSTAR was developed in Japan by Icom and is in use all over the world.  Not to be outdone, the hams at Motorola adapted their company’s new digital voice technology for use by the ham world.  Motorola calls it Mototrbo and the hams call it DMR, digital mobile radio.   DMR repeaters all over the world are linked via the internet and provide great communications between HT’s and mobiles everywhere.  A DMR system has been established in the Carolinas.  I will go into more detail in this program."

Charlie is a founding member of the DFMA and is, of course, our Repeater Manager.  He has presented several programs to the club in the past including some spectacular video footage related to towers.  He was first licensed in 1960 as WN4COZ, upgraded to General in 1961 becoming WA4WTX and later upgraded to an Advanced license.  In 2006 he acquired the vanity call NC4CD.  He earned his BSEE from Auburn University and worked as an engineer for GTE for 23 years.  Upon retiring from GTE he started Communications Structure which builds towers and leases space on them to wireless companies.

Dec 1 Program: DFMA Christmas Party Print E-mail
Written by ku4gc   
Wednesday, 25 November 2015 11:13

Continuing a tradition of having the DFMA pick up the club member's tab for our December Holiday Dinner Meeting, we will meet at Bullock's Barbecue Restaurant in Durham starting at 6:00pm. You will be able to order from the menu. Each member may also bring one guest. This Christmas dinner is the program. Bring your spouse or friend!

This is our Christmas Meeting! In that tradition you may (optionally):


* Bring a Christmas gift for a child to be distributed to needy families. If wrapped, mark gender and age range on the outside. If not wrapped, that's fine too. If you have one -- a gift bag would work too.

* The Club will make its annual gift. It will be split between the Durham Rescue Mission and the Food Bank of North Carolina. We will be passing the "hat" for additional personal contributions to these causes. (Some members will drop a check in the hat made out to the charity of their choice -- we will forward it -- the cancelled check may be useful at tax time.)

All gifts are optional - bring the gift of your presence for all to enjoy!


There will be no program as such. However, be ready to relate "Ham Radio New Years Resolutions" - what are your ham radio goals for the coming year. Do you finally want to go to Dayton? Do you plan to put up (or take down) a tower? Are you finally going to put together a real "go kit". Is Morse code in your future? We hope you'll be ready to share your ham radio dreams.

Bullock's Bar B Cue

3330 Quebec Dr
Durham, NC 27705
(919) 383-3211

(Between: Lasalle St & Mountainview Ave)
(Near: Lasalle St N & Hillsborough Rd)

[click here for map]



Last Updated on Wednesday, 25 November 2015 11:16
Group Purchase of Ed Fong's J-Poles Print E-mail
Written by NA4VY   
Sunday, 08 November 2015 21:29

At the DFMA meeting on Tuesday we had a live presentation via Skype on Ed Fong's DBL dual  band J-Pole antennas that he has designed and manufactures. There was considerable interest in purchasing these antennas and he has graciously provided our club with discounted price list and if we have an order of $250 or more, we get an additional 10% off which should cover shipping charges.

For more information on Ed’s antennas see his web site: http://edsantennas.weebly.com/about.html

In addition to the dual band antennas he also has an interesting triband base J-Pole antenna design which should especially be of interest to those who might need 220 band capability (we have a 224.6 local repeater) for only $50 including the PVC pipe. Note that the other base station antennas do not include the PVC pipe but this can be obtained locally from Lowe’s.

I have agreed to collect orders for a group purchase. To simplify things payment will not be necessary until we receive the finished antennas and/or parts which will then be available for pickup and payment at the next DFMA meeting.

If you wish to order any of the following items I’ll need to know the model or accessory and quantity desired together with your call, name and email address. To give everyone enough time to get the group order together please respond by Sunday November 22.

Thanks again to DFMA for agreeing to doing this and to Mark KR3AM for

Dave NA4VY        na4vy at msn dot com

Below is Ed’s email to Mark showing the discount prices (compared to the web site)

From: edison fong
Date: Wed, Nov 4, 2015 at 5:04 PM
Subject: Re: antenna purchases
To: Mark Sidell

Here are the discount prices for your group.
For the base station antennas (with exception of the triband) you will need to purchase the pvc pipe at Lowe's.  The Triband is $50.  We only sell these with the pvc pipe since they require and an anti resonant coil.  Shipping will depend on how many are ordered.  In quantity of one (its about $12).  However each antenna thereafter is only $3 extra.
Here are the prices on our standard product line.  Remember as a group you get 10% discount on orders of $250 or more. 

DBJ-1 dual band base antenna - available in HAM (144-148 MHz and 440-450 MHz) or Commercial (152-157 MHz and 460-470 MHz).  Maximum power input 75 watts. - $25
(also available in 250 watt version for $35)

DBJ-2  dual band roll up antenna -  available in HAM (144-148 MHz and 440-450 MHz) or Commercial (152-157 MHz and 460-470 MHz).  Maximum power input 75 watts. - $25

DBJ-220 220 MHz base antenna  -  uses J-configuration fits inside a pvc pipe.  $20

DBJ-UHF UHF – US Patent 8,947,313   +5dB gain no radial collinear – featured in CQ magazine  $40

All antennas can be custom tuned to your operating frequency at NO CHARGE.

The roll up includes the follow accessories for no charge.
1 -  SMA to BNC adapter
1 -  reverse SMA to SMA adapter for Woxun and Motorola  radios
1 -  6 ft low loss RG58AU extension cable with BNC male on one end and BNC female on the other. 

Other accessories that we buy in large quantities and pass the savings to you.

BNC to PL259 adapter -  allows the DBJ-2 to adapt to most base and mobile radios.  $2

6ft low loss RG58AU extension cable for the roll up antenna   $5

50 ft RG8x with molded PL259 connectors  $25 plus $2 postage

On orders of $250 or more, we offer a 10% discount.  Only exception is the 50ft coax since we are reselling it at cost. 

Last Updated on Sunday, 08 November 2015 21:36
Nov 3 Program: The Dual-band J-pole Antenna - Design and Construction Print E-mail
Written by KD4YJZ   
Friday, 30 October 2015 21:42

Tuesday, November 3, 6pm, Bullock’s BBQ
Program:  The Dual-band J-pole Antenna - Design and Construction
By: Ed Fong, WB6IQN
This month's program will be a talk by Ed Fong, inventor of the DBJ dual-band J-pole antenna. Ed will discuss the antenna's theory and construction. Some of you may recall building the antenna at the OCRA antenna party organized by Steve (W3AHL) in 2010. For the talk, we will beam Ed live from California via Skype.

Ed was first licensed in 1968 as WN6IQN. He later upgraded to Extra Class with his present call of WB6IQN. He obtained BSEE and MSEE degrees from the University of California at Berkeley and his Ph.D. from the University of San Francisco. A Senior Member of the IEEE, he has 11 patents and over 40 published papers and books in the area of communications and integrated circuit design. Presently, he is employed by the University of California (previously at Berkeley and presently at Santa Cruz) as an instructor teaching graduate classes in RF design and high speed interface design. During his 30 year career he has performed work for Motorola, National Semiconductor, Phillips Semiconductor and Advanced Micro Devices.

It sounds like this will be a "lively" presentation. Our thanks to Mark Sidell, KR3AM, for his help with bringing the program to life.
- Karen, KD4YJZ

Red Cross Needs Volunteers for Smoke Alarm Installs Print E-mail
Written by KR3AM   
Friday, 30 October 2015 21:23

Did you know that 60% of all home fire fatalities occur in residences without a working smoke alarm? Join the American Red Cross, Durham Fire Department, and Durham County Fire Department on Saturday, November 14 at 9am as we install over 200 alarms in high-risk neighborhoods throughout Durham. We will be kicking us off at NCCU’s McDougald-McLendon Arena (616 E. Lawson St, Durham 27707) for a short training and then we’ll head out in the community in teams. Don't want to be an installer? No worries! We have roles for discussing fire safety with residents and documenting the event. No skills or prior experience necessary - bring your friends!

We would prefer individuals and groups to sign up at https://tinyurl.com/DurhamAlarms2015. However, walk-ins are fine too! Click on flyer link below for more information or contact Jeffrey at (919) 489-6541 ex. 4120 or This e-mail address is being protected from spambots. You need JavaScript enabled to view it . Thank you for helping to save lives!

Jeffrey Isaacson ¦ Volunteer Specialist

American Red Cross of Eastern North Carolina
4737 University Drive
Durham, NC 27707
(919) 489-6541 x4120 (p) ¦ (919) 418-0530 (c)
This e-mail address is being protected from spambots. You need JavaScript enabled to view it

Interested in volunteering? We need you! Please visit www.redcross.org/volunteer today!

[Click Here for flyer with more info] ( -- pdf)

Last Updated on Friday, 30 October 2015 21:37

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