VARA, a presentation by Tim, AD4CJ

In addition to accepting the award for their 2018 November Sweepstakes win, Tim, AD4CJ gave a presentation on VARA. VARA is a software modem using orthogonal frequency-division multiplexing (OFDM) modulation.

VARA is capable of HF speeds comparable with Pactor 3. It does this using 52 carriers limited to 42 bps thus satisfying the FCC symbol rate requirements of 300 baud or less for any carrier. VARA uses a bandwidth of 2400 Hz.

VARA is available for HF as well as FM and can be loaded and used from within Winlink Express. Select Vara Winlink or Vara FM Winlink from the Open Session: menu in Winlink Express and follow the instructions in install it.

VARA is shareware; paying the shareware fee unlocks it’s full speed.

For more information or to download VARA for HF, FM as well as the documentation etc. visit https://rosmodem.wordpress.com .


Morse Code Tutor Build Event 2

The second Saturday Morse Code Tutor build event was also well attended.

This posting includes pictures from the second Morse Code Tutor build event along with Cliff, N4CCB’s video of Dave, KI4PSR demonstrating the steps involved in the build! Links to the schematics, parts information etc. are included as well.

Check out the build video here:

https://www.youtube.com/watch?v=w0OqeIEH08k&feature=youtu.be

and find pictures and links below.

(Links to the schematics etc. are included below the the pictures.)

Dave’s 3D printed case:

KI4PSR's 3D printed Morse Code Tutor case

 

Links:

https://wcares.org/wp-content/uploads/2019/10/WCARES_Morse_Code_Tutor_build_KI4PSR_MTC_1a_Schematic.pdf

https://wcares.org/wp-content/uploads/2019/10/WCARES_Morse_Code_Tutor_build_Front_Panel_Wiring_rev1.pdf

https://wcares.org/wp-content/uploads/2019/10/WCARES_Morse_Code_Tutor_build_Parts_List.pdf

https://wcares.org/wp-content/uploads/2019/10/WCARES_Morse_Code_Tutor_build_HEADPHONE.pdf

https://wcares.org/wp-content/uploads/2019/10/WCARES_Morse_Code_Tutor_build_SDcard_wiring.png

https://wcares.org/wp-content/uploads/2019/10/WCARES_Morse_Code_Tutor_build_All_traces_and_silkscreen_1a.pdf

Also see the following link at github for more details:

https://github.com/TemporarilyOffline/MorseCodeTutor

along with W8TEE’s talk:

https://github.com/TemporarilyOffline/MorseCodeTutor/blob/master/fdim-talk/MorseTutorTalk002.pdf


Morse Code Tutor Build Event 1

This past Saturday saw a number of WCARES members take part in the first of two Morse Code Tutor build sessions coordinated by Dave, KI4PSR and Cliff, N4CCB. Dave put together a very nice kit of parts which included an update of the W8BH version of the W8TEE Morse Code Tutor adding a very nice printed circuit board and 3D-printed case. Some members soldered their kits while others assembled boards Dave had pre-soldered, wired and tested!

For those that have signed up, the second build session will be this coming Saturday, Sept. 21st at the EOC.

Pictures from the first session are included below.


TNQP is Sunday, 1 September 2019

The Tennessee QSO Party is Sunday, 1 September 2019

From TNQP.org:

“The Tennessee QSO Party is an annual amateur radio event which takes place on either the first or second Sunday of September. All amateur radio operators in the great state of Tennessee are encouraged to participate as antennas around the world rotate and point to the volunteer state.

The Tennessee QSO Party is hosted by the Tennessee Contest Group. Each year tens of thousands of QSOs occur between Tennessee amateur radio operators and hams worldwide. Plaques are awarded for category winners.”

More information and the registration form for Tennessee stations planning to take part are here:

https://tnqp.org

Rules and resources:

https://tnqp.org/rules/
https://tnqp.org/resources/


Field Day 2019 – sign up!

2019 Field Day will be held June 22-23, 2019 and the sign-up sheet for the WCARES 2019 Field Day event is here:

https://docs.google.com/forms/d/e/1FAIpQLSegdZcWWtWK-BdIA7wRvzm84H2S5biWytE2CqUwx6x8QhXaAA/viewform

Field Day is always the fourth full weekend of June, beginning at 1800 UTC Saturday and running through 2059 UTC Sunday.


Building and testing a Windom

Inspired by the recent presentation on Windoms, Dave, KI4PSR with the help of Jon, KK4AIZ, Rob, KM4SOA , Paul, KM4PT and Doug, W4DML, built and tested the design during this past Tuesday’s Portable Ops. Dave said the SWR was great, just as described by Ted, W3TB.

From Jon:
“Station was Icom 7300, with battery and solar panels. We were able to tune 20, 40, 80, & 17. I made one contact into Western Pennsylvania; on 7.255 – missed NC callsign. Got a 5.6 report!”

Photos courtesy of Dave and Jon:


WCARES 2019 Winter Field Day pictures

WCARES members were out in force for this year’s Winter Field Day.

So, a few hours before midnight; 30 degrees at best; Traffic on Moores lane is near zero; the small tent is keeping us warm; On 80 meters; Three portable antennas in the field; The operator (N4CCB) decides to run a frequency (call CQ); I’m logging and chomping at the bit; Tuned up; Boom! …Two, Three, then four contacts a minute; Canada, Wisconsin to Alabama, Ohio, Western New York inbetween.
Talk about a RUSH! The CW station had similar runs at kick-off time.

Photos taken by Jon, KK4AIZ and Paul, KM4PT


Online Spotter Classes – NWS OHX

To sign up for the spotter classes visit: http://weather.gov/ohx/skywarn

From the National Weather Service:

“Online classes offer all the information that our in-person spotter classes offer with the added convenience of attending in the comfort of your own home!

Classes are FREE and open to people of all ages.
Each class is hosted by a National Weather Service Meteorologist from the Nashville WFO.

Classes run approximately 2 hours including a Q&A session.”

To sign up for the spotter classes visit:

http://weather.gov/ohx/skywarn

Basic Spotter Classes Advanced Spotter Classes
All start at 6PM All start at 6PM
Tuesday February 19 Tuesday March 5
Thursday February 21 Tuesday March 26
Tuesday February 26 Thursday March 28
Friday March 1  
Thursday March 7  

Does your receiver have an IQ? A talk by Dave Matthews, KI4PSR

Dave Matthews, KI4PSR gave a talk at a recent Chew & Chat. The talk covered receiver designs over time and included discussion of the Tayloe detector.

Randy Moore, KK4SRO, our EC, has uploaded a video of Dave’s talk to Youtube and Dave’s slides are available as well:

https://youtu.be/ZOvZlDoVlBw

and

Does-Your-Receiver-have-an-IQ.pdf


Field Day 2018 – Thank-you to all who took part!

Randy Moore, KK4SRO, WCARES EC would like to thank everyone who took part in what turned out to be a magnificent Field Day this year. It appears we did very well with numbers up in all categories. A big thank-you to Carl, KB9DKR and Cliff, N4CCB for all their hard work putting this event together.

Carl, KB9DKR echoed Randy’s words and congratulates all of the WCARES operators. Every station exceeded last year’s QSO targets – we’ll need to wait for the official results in November’s QST magazine but it appears we will do very well again this year. Carl thanks Commissioner Dana Ausbrooks and Williamson Co. Public Safety Director Bill Jorgenson for taking the time out of their schedules to visit our event and get on the air – Commissioner Ausbrooks at the GOTA station and Director Jorgenson operating at one of our SSB stations.

Carl also would like to give special recognition for the GOTA station which was planned, organized and run by Janise, KK4HTA and Joe, KM4QJW again this year. GOTA really knocked it out of the park this year. This station had the most positive attitude of any amateur station that Carl has ever encountered. The station was very carefully designed including a new station layout to facilitate pictures of the operators, multiple listeners and a separate space for printing of certificates and photos with the GOTA coach – all very important aspects of the public outreach that is part of GOTA. The great work done on the GOTA station will last a very long time. GOTA made 55 contacts and we would all like to recognize Janise and Joe for all the hard work running that station.

If anyone has photos or comments please get in touch with David, KK4CQD by e-mail kk4cqd@arrl.net .

Carl’s own person hightlight:

It was great to see so many of our WCARES operators working together. While working CW2 on Sunday morning, I came across a loud 10M beacon from Canada so I ran over to tell Jon Kessell who was working SSB1 and then returned to my station to call CQ and watch the band populate with signals on the pan adaptor. Then, I glanced at the logbook data and noticed that Jon had filled the entire screen with SSB QSOs–simply amazing for 5 watts. It was a phenomenal opportunity to be very early on what became the dominant propagation trend for the biggest radio event of the year. Oh Canada beacon, thank you! Carl KB9DKR