Category Archives: General

Articles about Amateur Radio and the Nashua Area Radio Society. This is a general category which includes most articles on our website.

Our Club Moving Forward Into 2017

Our club has accomplished a great deal in the last year. We have grown to over 130 members. We have introduced many new people to Amateur Radio, helped them to earn their Licenses and worked with them to get on the air and develop their knowledge and operating skills. We’ve also worked hard to provide opportunities to enjoy and learn about Amateur Radio for members of our club and for the Amateur Radio community which we are a part of.

Much of the credit for our club’s success this past year belongs to you, our members. We very much appreciate all that you have done to contribute to our success and the fun that we have all had as part of what we have done together. Your enthusiasm and support provide great encouragement and inspiration to the many new members who have joined us as well as to all of us who are part of our club’s Leadership Team.

We, as your club’s Executive Committee, have been working on a set of goals and plans to continue on this path during 2017 – to provide even better opportunities for our members to learn more about and to enjoy Amateur Radio, to continue to encourage people to join the Amateur Radio Service, and to provide opportunities for STEM learning for young people.

Our goals and focus for 2017 centers around continued success in and focus on the following areas to benefit both our members and our community as a whole:

To do these things and to be successful as a growing club, we are also pursuing status as a 501(c)(3) non-profit. This will enable our club to more effectively secure support from other groups to further our work towards these goals.

Each of us has taken ownership for creating a focus on meeting different aspects of our goals for this year. We are planning to share more about our plans for 2017 at our February Club Meeting.

We are asking that each of you, as members, to consider how you can get the most from all of these and the other opportunities that our club provides. We are working hard to try to create something for everyone that can provide enjoyable opportunities to have fun, to contribute, and to expand the value that we all create and derive by being part of the Amateur Radio Service. We are also asking each of you, our members, to consider helping us with these initiatives in 2017.

  • Jamey Finchum, KC1ENX – Membership Chairman
  • Anita Kemmerer, AB1QB – Activities Chairman
  • Brian Smigielski, AB1ZO – Programs Chairman
  • Mike Ryan, K1WVO – Interim Secretary
  • Wayne Wagner, AG1A – Treasurer
  • Greg Fuller, W1TEN – Vice President
  • Fred Kemmerer, AB1OC – President

ARRL Kids Day on the Air

On Saturday, January 7th the Nashua Area Radio Club participated in the ARRL’s Kids Day on the Air.  Fred (AB1OC) and Anita (AB1QB) opened up their station for any youth that wanted to come and participate!  We also had snap circuits available with help from Greg (W1TEN) and CW paddles for those who wanted to practice up on their Morse code.

Unfortunately, the weather did not cooperate with us as it was a snowy day with slippery road conditions.  We had a couple of youth not able to make the event due to the weather, but we still had a few show and they were very enthusiastic!

Connor (KC1GGX) operating on 20 meters during Kids DayConnor (KC1GGX) started the event off by operating on 20 meters and made several contacts.  Despite having a little “mic fright” he warmed up nicely and didn’t want to share the mic when it was someone else’s turn!

 

Abby (AB1BY) stopped by and had two frienAbby (AB1BY) operating on Kids Day with her two friendsds – Samay and Jaegen – from her Destination Imagination team with her.  Abby got the ball rolling for her friends and  showed them how to create a pile up – just have a young YL voice and the calls start coming!  She then turned the mic over to Samay and Jaegen and helped them work through their first QSOs.  They soon were comfortable with the phonetic alphabet and they had fun spelling their names during their QSOs.

Despite the weatherEveryone had a great time during Kids Day, the kids had a great time and it was a lot of fun to see the youth in our club improve their operating skills and watch the new kids make their first contacts!

 

Kids Day FunMark you calendars for Sunday, June 18th when the next ARRL’s Kids Day on the Air takes place.  I feel pretty comfortable saying there won’t be any snow… but, this is New England.

 

First Homebrew Contact on my Scratch Built BitX20 SSB Transceiver

About a year ago I decided to build an SSB transceiver for making contacts with other amateur radio operators on the HF bands.  I was given good advice from both Bill and Pete from the SolderSmoke Podcast to start out with a direct conversion receiver then go with the BitX20 as a first SSB rig.  I am very happy that they gave me that advice and I would agree that the BitX is not a good first project.

After getting all the proper adjustments made and confirming proper operation with a dummy load it was time to put this rig on the air (I don’t need a case)!   I tried calling CQ using SSB voice but no one came back.  I then decided to add some relays and other modifications to allow digital modes.

On January 15, 2017, at 21:46z I answered a psk31 CQ from Josh K1JOG in Kissimmee, FL.  Little did he know that he would be making history (maybe just for me) in my first home brew QSO.  Below is his eQSL card to me.

BitX20 First Contact QSL
Thank you, Josh K1JOG for the contact!

If you are interested in scratch building this rig you can follow the photo link  below:

BitX20 Homebrewed Transceiver
BitX by Ashhar Farhan, VU2ESE

Ashhar Farhan also sells a BitX40 at http://www.hfsigs.com/

The units he has built in India are almost ready to put on the air.  You build the case/box or just go open board style!  You can’t beat the $59 price for a rig!

Below are some photos of my project:

BitX20 Mic amp on the left LM386 audio amp on the right
Mic amp on the left LM386 audio amp on the right

A good place to start is the Audio “end”.  I built mine using perf prototype board.  FYI the 10k ohm resistor on the mic amp needs to be 39k ohm for proper bias.

BitX20 Balanced Modulator
Balanced Modulator

On the balanced modulator, I used a mystery toroid core because I have a bunch of them and they did not cost much!

BitX 10 MHz crystal filter
10 MHz crystal filter

In this photo, you can see some transmit and receive amplifiers and the crystal filter.  I built some test equipment and used a frequency counter to make a matched set of crystals.

BitX20 Mixer circuit
Mixer circuit

The mixer circuit is shown here with some coax to the left that is from the VFO.

BitX20 VFO
Original VFO design on the left. Filtered SI5351 clock generator on the right

You can see the benefit of building small modules.  With SMA connectors, I can quickly swap out the VFO “soul” of this rig!  No more drift with the SI5351 chip! I ordered mine from Adafruit. I added a small LC filter to the output to make a nice sine wave.  I am not sure it is needed.

BitX20 Bandpass Filter
Band Pass Filter by Pete N6QW

Now I had trouble with the original band pass filter.  I’m not sure why but a quick google search on 20m band pass filter and I found a replacement circuit on his website.  When I told Pete about this he sent me a new updated design to try.  My PTT relays are 5v so the small heatsink is for the voltage regulator.  I also included diode protection for the replays.

BitX20 Power Amplifier
Irf510 power amplifier

The IRF510 is more of a switch and not designed for linear RF amplification but it is cheap and works great for QRP.  They have different bias requirements from one unit to the next.  That is why you carefully set the bias level with a trim pot.  The large heat sink was part of an old high power LED driver that died.  I used T37-6 toroid cores for the low pass filter on the right. The 2nd relay was needed to prevent the output of the IRF510 feeding back into the original PTT switch and back into a nasty loop.

I am not sure if this rig will ever get a case or future modifications but I do know that I would like to see if I can make more contacts with it.

I would like to end this article with a quote I very much like from a video with Rev. George Dobbs, G3RJV

“Radio construction is rather like a pilgrimage where the journey is often more important than the destination”.

73,

Mike,  AB1YK

Radio Amateurs Developing Skills Worldwide