AmateurRadio.com

I checked WSPRnet.org this morning and found quite a lot of activity on 10m so I fired up the K2 and joined the fun with a 1 watt signal. By late afternoon I’d had well over 40 unique call / spotter combinations including good reports from FR1, VK6, VE and the USA.

At lunch time I switched to the K3 (which has a mic attached) to make some SSB QSOs. This was not especially productive. Several US stations running high power to multi-element beams were huge signals over here, but they had huge numbers of European stations calling them and my 100W to an attic dipole had trouble being heard over them. Actually I was only using 80W as I found going up to 100W on 10m caused my homebrew digimodes interface to disconnect itself from the computer. When I was heard, I received good reports from N2JF and NU1O. Perhaps I’d have made more contacts if I’d called CQ.

During my WSPR session I saw that my signal had been spotted by a callsign that rang a bell: G4HBA. A quick look at qrz.com confirmed that my memory was correct: G4HBA was Roger who had also been G8KRT some 35 years ago. During the long hot summer of 1976 when I was G8ILO and only allowed to use 2m and up I was home from university and using an Icom IC-202. Roger was portable from near his place of work in south east Essex and working strings of Continental stations during the endless tropo openings. As I had no antenna at the parental QTH I drove out to find him and on several days I joined Roger and made some contacts under my own call.

One evening I drove out to the site and Roger was not there, so I went to the top of the hill and started operating using my IC-202 and a small beam I made that was supported by the car door. After about half an hour it was getting dark and I noticed torches moving about and closing in on the car. Suddenly I was surrounded by police in uniform! Apparently my car interior light had been spotted from several miles away (as I was on top of a hill) and as I was right next to a radar station someone had wondered what I was up to. That was the end of my operating from that particular site, but I will always remember the amazing VHF propagation of that summer and regret that I never experience such conditions on 2m here.

Julian Moss, G4ILO, is a regular contributor to AmateurRadio.com and writes from Cumbria, England. Contact him at [email protected].

Happy New Year to all! I’m back after a week’s vacation for the holidays and feeling very rested. Tyler, N7TFP on the other hand, has been busy, busy, busy. I don’t know about the holidays, but the videos he’s been cranking out are great! Here’s another one for you!I have been saying this with the last couple videos that getting back to basics are great for the veterans on the air, and these are great tutorials for those just joining or recently joined the hobby. In this one, Tyler shows how to set the proper mic gain on your SSB tranceiver. Without any more fanfare, heeeeeeeere’s TYLER!

73.

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Rich Gattie, KB2MOB, is a regular contributor to AmateurRadio.com and writes from New York, USA. Contact him at [email protected].

In my last post I promised to write about the minimum-loss matching pad that I’m using to couple my signal generator to the device I’m testing. The source impedance of the generator is 600 ohms and the output is intended to be terminated in a 600 ohm load, but the device I’m testing is only 228 ohms. The way to match this with the lowest loss is with a transformer, but it is inconvenient and unnecessary to come up with a transformer for every mismatch this piece of test-equipment will face.

Thanks to advice from the ham who is guiding me in this project, I’m using a minimum-loss matching pad, also known as an “L-pad,” to match these two impedances. (I’d tell you who this fine fellow is, but to keep you in suspense about my project I’ll wait until my final write-up. If I name him now, the cat will be out of the bag!) This quick, cheap, and easy match requires only two resistors:

To calculate the value of the resistors and to calculate the loss of the matching pad, use these formulas (A spreadsheet that uses these formulas is available through this webpage.):

In my case R₁=472, R₂=290, and the loss is -9.25 dB. That loss is pretty significant, but it is acceptable for this application. Remember this is a minimum-loss matching pad, not a no-loss matching pad. Using what resistors I had on hand to come as close as I could to the required values, I soldered this pad on a generic PC board from Radio Shack that I cut in half using my Dremel tool with a cutting wheel:

For more on this topic, I commend to you this webpage on “Impedance and Impedance Matching.”

Todd Mitchell, NØIP, is a regular contributor to AmateurRadio.com and writes from Minnesota, USA. He can be contacted at [email protected].

VE1BA's shack

Well on Tuesday it's back to work and one of my 2012 ambitions....don't like the word resolution with me it is linked to a list of "non-goals". So for 2012 the buzz word is "ambitions". Well as I was saying the new ambition is to get on the rig more. This afternoon I did just that and had some two way QRP contacts. The first was with John VE1BA down in Nova Scotia. He was running 2 watts into an FT-817. At the time I thought I was running 500mW's but the K3 was set at 5 watts. So that gave me only 153 miles per watt. We had a short but nice chat on 20 meters. I had a chance on the K3 to use the APF filtering as John's RST was 229. The APF worked great as he jumped out from the noise floor.

I then called CQ on 14.060 and Mike N0ZH came back to me with a 559 signal. He gave the the same signal report. It was not long before Mike started to fade in and out and very hard to read. So my QSO to Missouri came to a fast end. For this QSO the K3 was at 1 watt with a better miles per watt at 694 miles. I did hear KF5HGL calling CQ I started returning his CQ at 500mW's and climbed all the way up to 5 watts and he was not able to copying me. So either conditions were changing or it was not time for me to make a QSO into New Mexico.

N0ZH's shack

Mike Weir, VE9KK, is a regular contributor to AmateurRadio.com and writes from New Brunswick, Canada. Contact him at [email protected].

I recently wrote about the Summits On The Air (SOTA) program gaining traction here in Colorado. Catching up on some of my podcast listening, I came across Jerry KD0BIK’s Practical Amateur Radio Podcast (PARP) on the topic of SOTA. It turns out that Jerry has gotten hooked on the SOTA program and has been out activating some of the Colorado peaks in December.

Operating a ham radio on top of a mountain during winter may seem like the act of a person with only one oar in the water (or shall we say one half of a dipole in the air?). But actually, we’ve had quite a few days of favorable weather that have been begging us to get outdoors in December. Still, I am on guard for an activation by Jerry in the middle of a blizzard, as he seems a bit smitten by this SOTA thing.

Episode 49 of PARP introduces the SOTA concept near the end of the episode, which is followed by a deeper SOTA discussion in Episode 50. These two episodes run about 25 minutes each, so take some time out to give them a listen.

73, Bob K0NR

Bob Witte, KØNR, is a regular contributor to AmateurRadio.com and writes from Colorado, USA. Contact him at [email protected].

So how was 2011 here at VE3WDM,

I have always been a QRP operator but for the first time I decided to drop my output power to less than 5 watts. By the end of 2011 the output had dropped to 500mW's or less with great success as well.

I took some time to look around the shack to notice how much "stuff" I had that was just taking up space. I then put up for sale items I was not using and made enough for some new toys.

I discovered WSPR and all that you can do with it. 


 I was able to upgrade the shack. The Elecraft K3 was upgraded with a second receiver and matching filters. Along with some added treats.

My main contest antenna was the Sidekick from High Sierra antennas. It was a great antenna that gave me coverage from 10m to 80m. The problem was it could only be outdoors when I was on the radio due to antenna restrictions. I tried the Sidekick in the attic along with my 20m dipole but it just did not work.

I sold the Sidekick and ordered the Alpha Delta DX-33 and installed it in the attic. I am now able to work 10m to 40m anytime I want and not worry about an outdoor antenna.

I found time to get some kits done and added to the shack. 

I also had some Plasma TV interference so I purchased an  MFJ-1026 and that fixed the problem it's a great unit.

I did more portable op's this year with my Elecraft KX1 and had a great time.

There was my trip of a life time to the UK and ham radio came along for the ride as well. 

There was some wall paper added  WAS awards, 1,000 miles per watt at 8,325 miles per watt. I then topped that record with 16,737 miles per watt.

Much more went on but these were the highlights here at VE3WDM!
Mike Weir, VE9KK, is a regular contributor to AmateurRadio.com and writes from New Brunswick, Canada. Contact him at [email protected].

Mike Weir, VE9KK, is a regular contributor to AmateurRadio.com and writes from New Brunswick, Canada. Contact him at [email protected].