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My reason for getting the Intek H-520 Plus hand-held was to try to work some Sporadic-E DX from the great outdoors. I didn’t think the supplied 18cm whip would be much good for that so I looked for the longest 10m BNC whip antenna possible. The best I could find was the AT-10 with a 4 foot telescopic whip which I believe is made by Sandpiper Antennas in Wales. It is sold by Waters and Stanton. I ordered one yesterday and it arrived in the post this morning – nice to see they can get it right sometimes.

The first thing I did with the antenna was put it on my AA-200 antenna analyzer. I was dismayed to find that the SWR on 10m was more than 10:1 and the best match was around 38MHz. I anticipated that this would be going straight back. However the instruction sheet “Getting the best out of your antenna” recommends using it with a counterpoise. I had expected to use one for best performance anyway, so I decided to try this before writing the antenna off completely.

The instruction sheet recommends a length of 6ft 5in for 10 metres, but I found that was too short as the best match was still well above 30MHz. By trial and error I eventually found a length of 7ft 6in was about right. The best SWR was still only 2:1 so I think the antenna is capable of improvement, but there is nothing else available to the best of my knowledge.

If a counterpoise is required you might think it would be a good idea for the manufacturers to provide somewhere to attach one. I tried using an alligator clip but it tended to slip off the BNC connector. In the end I managed to solder to the outer sleeve of the BNC connector using my biggest soldering iron turned up to maximum temperature so the counterpoise is now permanently attached to the antenna (until the wire breaks off, which it will probably do in the middle of a field just at the start of a massive band opening.)

Now I just need some Sporadic-E to see how far it is possible to work with a hand held radio.

As some of you know, I’m a bit of a sucker for hand-held radios. Whilst browsing eBay I’d often come across the Intek H-520 Plus CB hand-held and thought what a nice looking rig it was and wouldn’t it be nice if it could be converted to amateur 10m usage. A couple of days ago I stumbled across a site that gave the details of how to convert it for amateur 10m use so I decided to order one. It arrived this morning.

Never has a radio been taken apart so soon after its arrival. (Real hams don’t care about warranties!) Unfortunately, no matter how hard I tried, I couldn’t find again the site that had the modification information, but I vaguely remembered the details. Beneath the battery compartment there is a loop of wire. Snip it and push the ends apart. I’m not sure what that does. Now put the batteries back in and turn on the radio whilst depressing the Menu button. You can then select the option “Po” by pressing the down arrow button. Press Menu again, then press and hold the up arrow button until the frequencies displayed are in the 29MHz region. You now have a 10m FM / AM hand held.

Whilst I was doing this I was WSPRing on 10m and I saw some very strong traces from stations in Germany indicating that there was short-skip Sporadic-E on 10m. Were conditions such that I would actually be able to make some contacts with the new radio today?

The antenna supplied with the Intek H-520 Plus is about 15cm long so I suspect it will be less than useless for making any DX contacts. Clearly what I need in order to use this as a portable radio is some kind of long BNC 10m antenna, but at the moment I don’t have one. The H-520 comes with a “car kit” which screws to the bottom of the radio and allows you to power it from an external supply and connect an antenna with a PL-259 plug. So I hooked it up to the shack supply and the attic dipole.

I tuned around and there seemed to be things going on, so I found a clear frequency, 29.520MHz, and called CQ. After a few seconds jack PE1JRP called CQ on the same frequency. I called him and we made contact. He found my signal was up and down, as I did his, but he gave me a 53 report. He said that Leo PA3ELQ was waiting on the frequency and he then called, for my second contact. My report in this case was 57. They were both pretty impressed with my signal running – as I thought – 4W output.

I decided to check the H-520 Plus on my power meter and found that, far from putting out the advertised 4 watts, it was only radiating a whisker over 2. I took it down to the CB channels and even there it was giving barely 3W output. I also recalled that the web page that I could no longer find mentioned the need to turn up the deviation for 10 FM use.

I managed to locate and download a service manual for the H-520 Pro and this gave a procedure for adjusting the power. I had to turn the power control pot all the way up and I still only got about 3.6W on battery power (and just about 4W when running from the car adapter.) That’s good enough, though. From the block diagram I also was able to identify the FM modulation pot and turned that up a bit, though neither of the Dutch stations had complained about my audio. In the picture above, the red circle shows the wire loop that you cut, the green circle shows the power out pot and the blue circle the modulation control.

With the radio back together I hooked it up to the dipole again and worked Oliver DH5PK, receiving a 53 report. I am quite happy with my three contacts considering that I only opened the box after lunch and the radio spent much of the time disassembled. I saw from VHFDX.info that there was a great opening on 6 metres at the same time, but making contacts with less than 4W of FM is more challenging.

What I’m hoping, of course, is that I can make some contacts like this using the H-520 Plus as a hand held radio with a whip antenna!

There is speculation at the moment about whether Icom will release the new IC-9100 top band to 23cm transceiver at Dayton, and what the price will be.

I wish someone could tell me why there is this trend towards do-everything shack-in-a-box radios instead of separate VHF/UHF rigs like the now discontinued IC-910H which I just bought? One of the reasons I switched from using a transverter to having a separate rig for VHF is that I can’t use HF and VHF at the same time. An all-in-one radio would have just the same limitation.

Just because technology makes it possible to cram everything into one box doesn’t mean that there is no longer a reason to have separate radios. If you want a new multimode radio for 2m or 70cm you have to buy an FT-817, FT-857, FT-897 or TS-2000 – which are all compromise rigs with fairly poor performance – or wait for the IC-9100. No wonder good single VHF band multimode rigs like the IC-275H are now worth their weight in gold bullion.

I phoned up Radioworld this afternoon to ask why I hadn’t received the 2m 5/8 vertical I ordered a week ago. After looking up the order the girl told me that the stock hadn’t come in yet. “We sent you an email yesterday” she said. That was presumably in response to my shirty enquiry yesterday. I checked through my Spam folder and I didn’t receive any email from Radioworld. I mentioned twice that I had received an email saying the item was despatched on the day I ordered it, but there wasn’t the slightest hint of an apology, just a repetition of the fact that the stock hadn’t come in yet. Radioworld goes on my list of dealers to avoid.

LAM Communications by contrast has been a pleasure to deal with. After failing to win any VHF multimodes on eBay I decided that rather than gamble my money on the stock markets or leave it in the back at an almost zero rate of interest I might as well buy any radio gear I want, so I treated myself to an Icom IC-901H. LAM had a used one for sale so I phoned up to ask about it. I was told it was in really nice condition but when I asked its age the salesman (Dave) didn’t know, so he promised to phone Icom UK to find out when the guarantee ran out and call me back.

This he did after a few hours. He was a bit apologetic, saying that it was made in 2003 so there was “a bit of age behind it” and in view of that he would knock an extra £50 off the price and throw in carriage for free. I decided to go for it and he then warned me that the FedEx courier had already called so it wouldn’t go out until the following day. Fine, so it would arrive today. It did, well-packed (the Icom box was bubble wrapped and inside a larger box) and was exactly as described. Better, in fact, I can’t see a single mark on it. I am well pleased, and would be more than happy to buy from LAM Communications again.

The worst offenders in my experience for service have been Waters and Stanton. I forget the details of all the times I had to hassle them to send things I ordered, such as when I bought a rig advertised as with a free desk mic in RadCom and they didn’t send the free desk mic. A classic example of dealing with W&S was when I ordered the MFJ magnetic loop a few years ago. I didn’t receive any email or acknowledgement and no money was taken from my account so I decided that the online order hadn’t gone through. I started to have second thoughts about needing the antenna so I decided to forget about it, which I did until one day, more than three months later, without any prior warning, a courier knocked at the door with a very large box…

How’s this for poor service? I ordered a 2m 5/8 vertical online from Radioworld on Wednesday May 5th. That afternoon I received an email updating the order status to “Despatched.” I paid £10.00 for next day courier. We have ensured that someone has been in all the time every day since then and no-one has tried to deliver an antenna.

I sent an email at lunchtime asking why I hadn’t received it yet. As of now, I have had no reply. Why is buying ham radio equipment always such a hassle?

The screengrab below, from WSPR at 0815 this morning, shows just how selective Sporadic-E propagation can be. For a change, G4ILO is hearing and being heard by all the European stations while those in the south of England aren’t getting anything.

Look, too, at all those lines going off the top of the map to OY1OF. I wish I could understand the propagation. It appears that if you like the 10m band, the best place to live is the Faroe Islands!

For the last week or so I have been using the K3 for WSPR on 10m to detect the signs of any Sporadic-E openings. Since the opening of May 3rd there has been nothing very exciting to report, though it has been interesting to see spots of stations previously never heard suddenly appear, often at good strength, as a patch of ionization materializes in just the right place.

What has been intriguing over the last few days is the consistent appearance of spots involving OY1OF throughout the day, often with stations in the UK but also with those in Holland, France or Germany.

The distance is too far, obviously, for the ground wave propagation that is often the only propagation reported between closely located stations. The spots are too frequent and too widespread to be Sporadic-E. And they surely cannot be regular F2 layer reflections, as the MUF in this part of the world at this point in the solar cycle is still far too low (the F2 critical frequency is around 4MHz according to the IPS Radiowave Propagation Center.)

Could it be scatter from the ash of the Icelandic volcano?