A couple of friends and I did a trip to Kearsarge Mountain today. We had a fantastic time and made a couple of dozen nice contacts. Dave K1SWL, Tim W3ATB and I met at Kearsarge. The view was fantastic.

Dave brought his KX3 and put up a simple vertical wire 28 feet long. He sat at a picnic table directly under the wire and had a short counterpoise. The internal tuner managed the setup just fine. Dave made a dozen DX contacts mostly on 15 meters. I don’t have his log.

Tim brought his HB-1B and wanted to test out a 30 meter dipole he made. He plans to use it during an upcoming trip to Antigua. The antenna had a great SWR. After the test he switched to 20 meters and used his Par End Fed as a horizontal up about 25 feet. He made three stateside QSOs and was thrilled with the results.

I set up with a west facing view. I placed an inverted L up about 25 feet and across about 40 feet. I tuned the wire with the internal tuner on the KX3. I was hoping to make some SSB contacts in the military cross-band exercise and I had a mic out for awhile. But I abandoned that effort and went back to CW. Here’s my log:

9 May-15 1555 24.891 US5WE CW 599 599
9 May-15 1558 21.012 EA2NN CW 599 599
9 May-15 1600 21.026 SN7Q CW 599 599
9 May-15 1652 14.021 K3ZO CW 599 599
9 May-15 1655 18.087 AO150A CW 599 599
9 May-15 1657 21.021 HA3NU CW 599 599
9 May-15 1700 21.016 M0BEW CW 599 599
9 May-15 1701 24.891 US5WE CW 599 599
9 May-15 1705 18.082 R120K CW 599 599
9 May-15 1706 18.087 AO150A CW 599 599

I wasn’t paying attention and realized back home that I had several dupes.

We operated about an hour and a half and had a nice picnic lunch before heading down the mountain. Working DX was a lot easier today than battling the black flies. They were pretty thick and we were all glad to have a nice breeze and some bug spray handy. The little park area midway up the mountain makes a perfect place for operating on a beautiful day.

See https://sites.google.com/site/g3xbmqrp3/hf/interval  .

For a touch of pure nostalgia try the link above. Like many, my first experience with short wave was as an SWL, listening on a simple receiver to some of these broadcasters. Many were trying to indoctrinate me whereas all I was really interested in was a QSL card! I recall some great gifts from China! I heard some impressive DX back in the 1960s.

Of course radio amateur DXing came later and  radio amateurs ran considerably less power. These days I regularly copy stations running less than 5W from the other side of the planet, but I can still recall the thrill of hearing a 5kW broadcaster in the Windward Islands and copying Radio Australia on a crystal set – all the way from Australia too!

As you will have noticed by now, 10m is one of my favourite bands.  Although quiet at many times in the solar cycle it always comes to life with Es from late April until September. Alert 10m operators will sniff out Es at other times too, but there may be long periods of noise, as on 6m. WSPR is an ideal mode when the band may otherwise seem quiet.  It is good for local nattering at any time and F2 N-S DX  is often there even at solar minima.  Antennas for the band are small and easy to make such as the design on my website for a 10m halo. See https://sites.google.com/site/g3xbmqrp3/ .

A video of K7AGE making a dipole for 10m is available at YouTube.  See https://youtu.be/84F4UgSWmQo.   In this video, Randy is making a dipole for the USA technician’s band, so to cover the main SSB band (28.4 to 28.6MHz) you will need to make the wire slightly shorter.  In my experience if you cut the wires for the centre of the band it will still have a pretty low SWR at the band edges. Even a very simple ATU will bring the SWR down to 1:1, although  unless your rig has a problem with a mismatch of around 1.8:1, I would not bother, as the difference in radiated power is negligible (fraction of an S-point).

Because of the short wavelength, 10m antennas don’t have to be that high to be effective. When the band is in good shape, worldwide DX can be had with simple wire antennas and low power. It is a rewarding band.  What is more, 10m multi-mode transceivers can be bought at low cost.  In summary, 10m is unique: low cost transceivers, simple antennas and good DX potential.

A radio amateur in Nottingham,Vic G0RVA, recently bought one of these Belcom rigs. It appears to be an all-mode 70cm rig, although I am not familiar with this unit.

I know Belcom did a 2m version (the famous Liner-2, which I did once own) and a similar version for 70cm. The Liner-2 was a modification of their 10m version, which I don’t think was ever sold in the UK.  Inside Vic’s rig was what looked like a canned preamp with the marking “AngleLinear” but again I am not familiar with this unit. Angle Linear appear to be based in the USA http://anglelinear.com/ .

In its day, the 2m Liner-2 transformed 2m. It was a synthesised SSB rig and was frequently pushed too hard so that splatter was a problem. I was amazed how far I could work on 2m SSB with 10W pep. From Cambridge I could work stations that would have been impossible on FM or AM. I found I could work 200-300km with a simple antenna under ANY conditions.

Many were critical of these early Belcom transceivers, but I enjoyed my Liner-2 as did many others. Later I bought an ICOM IC202 which was a better radio, but with less ERP. The IC202 had a mock military style, that really was not too clever.

The “coming of age” of 2m SSB marked the change from “tuning high to low” to single frequency working. Sadly, there is far less activity on 2m SSB outside of contests so people think VHF is only really any good for local QSOs. With 10W SSB, or even less, it is possible to work a long way on VHF irrespective of conditions. From my current QTH, I think 200km is reachable with 5W pep and a 3 el beam on 2m. It is not that different on 70cm where I use 5W pep and a 5 el beam. Both my beams are hand rotated.

See http://www.kb6nu.com/is-amateur-radio-still-a-gateway-to-electrical-engineering/  .

At one time, amateur radio was a good gateway into an engineering career, but I have real doubts this is true today.  In my younger days, when I started as a professional radio engineer nearly everyone who was any good was a radio amateur.  When I left 7 years ago, I was the only person doing any amateur radio building over my lunch break.  The magic is no longer there.  In fact people are embarrassed to admit they are radio amateurs. We need to find what connects with the younger generation  or the future of our hobby is at great risk.

I think I have mentioned on my blog before that when interviewing potential RF design engineers with good honours degrees I was appalled to find that most knew nothing about radio. I knew more as a schoolboy. This is a sad indictment of our times. It was not that I was good (I was not) but the quality of good engineers was not there any more. There was little intrinsic interest in radio – if it was in the course they might know about it. As youngsters, we were excited about radio! Where is that spark today?