IOTA contest - 10m QRP

For a few hours today I managed some operating on 10m QRP in the IOTA contest. No great DX (best was Cyprus) but I did work a couple of stations when running just 500mW pep. They didn't appear to notice the low power and still gave me 59! For a little while I tried calling some of the stronger stations with 50mW pep, but in the limited time I had the best I got was a G3X.. QRZ? at that power. With 50mW on CW it would have been quite easy.

Interestingly I heard GD (Isle of Man) and GJ (Jersey) on 10m SSB today. Both are usually too near to work or hear. Unfortunately I didn't managed to raise them. Pity as they would have been new DXCC entities for me on the band.

SixBox (6m) and FredBox (2m) - /P tests

This evening I managed 16kms contacts with both the SixBox 6m 40mW AM transceiver and with the Fredbox 2m 10mW AM transceiver. QSOs were from Aldreth, Cambs, to Swaffham Prior.

Signals from the SixBox were copied by Andrew G6ALB when I was TXing with a 6m 1/4 wave antenna on a magmount on the car roof. On the superregen RX there was solid copy of G6ALB's 6m AM signal. Andrew uses a Diamond V2000 vertical, which recent discussions have confirmed are NOT as effective as a true 1/2 wave vertical on 6m. Clearly if Andrew had even a 2 el beam the QSO would have been a very decent one.

After finishing on 6m QRP, we moved to 2m AM to try some tests with the 2m Fredbox. A solid QSO was quickly achieved with the 10mW Fredbox using the 6m 1/4 wave antenna on the car magmount. This acts as a 3/4 wave antenna on 2m. I then tried the same antenna on the Fredbox handheld. Again, a solid 2-way QSO at 16kms distance. Switching over to a 1/4 wave whip on the handheld Fredbox resulted in a weaker, but just usable signal and QSO (same signal level as on the 6m SixBox). Finally, I tried the Fredbox handheld with a small helical antenna. Although Andrew could just detect this, no real QSO was possible.

So, with the V2000 in use at the far end of the contact, 40mW AM on 6m was not as strong as 10mW AM on 2m. Notheless, it was fun to give both rigs a portable outing and make some contacts.

The picture shows me during the Fredbox QSO using the 3/4 wave whip on the Fredbox.

Ham radio and young people?

Last night I gave my "Kitchen Table Minimalist Radio" talk at the Peterborough Radio Club. Everyone was very welcoming and, to my surprise, there was a very good number of people there to hear me. Afterwards quite a lot of the group came up to take a look at some of the homebrew gear that I had made and talked about.

One thing that struck me, again, is how few young people there were there. Having given similar talks in 3 clubs in East Anglia now, one can count on one hand the number of youngsters (boys/girls) at the meetings. OK, it could be my subject did not appeal to them, but I think this is a more general issue and one that we HAVE to address seriously or the hobby will die with us in another 20 years or so.

The RSGB (and I suspect the ARRL) have initiatives such as GB4FUN to help this shortfall of youngsters coming into the hobby. I feel that it is in the schools, youth clubs and scout groups that we have to inspire kids with the magic of radio.

Even after 50 years, radio still is magical for me. I just wish I could help to "spread the word" to today's young people. Also, industry NEEDS new radio engineers before the oldies die out!

V2000 vertical on 6m

Several recent local tests on 6m lead me to believe the V2000 triband vertical is not that good for local working. It is fine for DXing but signals around 15-25 miles away are weaker than I'd expect. Maybe the polarisation is not as truly vertical as I had believed? I can access the 6m repeater 25 miles away OK and can work stations, but at levels lower than I would have expected. Essentially the V2000 should be like a vertical halfwave on 50MHz, so this is a bit puzzling. In the past I had assumed it to be a pretty good antenna, but maybe not.

SixBox testing and "super" 6m DX

Back home in Cambridgeshire now and, sadly, was unable to find anyone within a 15-20 mile radius when in S.Devon with whom to test the SixBox QRP AM rig. This despite calling for several DAYS on the local 6m and 2m repeaters.

The Torbay 6m FM repeater was a good signal and I could access it well, but I heard not one person using it! No-one even replied to a call through it.

I had plenty of 6m DX QSOs on SSB using the magmount on the car and 5W though, and heard (but not worked) some remarkable transcontinental DX on the band from South America.

So, back to more modest aims, I shall be on the lookout for stations in East Cambs to do further range testing the SixBox. Let me know if you have 6m vertical and AM and are likely to be workable with 50mW AM from East Cambridgeshire so we can try a test. I am located in Burwell and have a reasonable takeoff to the west and north.

Peterborough Talk - Wed July 22nd

This Wednesday I am giving my "Kitchen Sink Radio" talk at the Peterborough Radio Club. I will put the presentation on my website after the event. At the moment I am hoping my wife's WinXP PC survives as it has two keys which packed up last week. I need this PC for the slideshow. Arghhh!!

6m Super DX

For the last few days I have been in South Devon on holiday. Some evenings I have been out looking for skeds with the SixBox 6m QRP AM transceiver but two tests failed even with 2W AM from the FT817 and the 1/4wave magmount, so no QSOs with the baby rig yet. However, I managed several European DX QSOs with 6m QRP SSB, all with good reports.

Last night was exceptional on 6m: YV4DDK, FM5AA and 9Y4D all coming through at good strength (at times) on 6m SSB with just a 1/4wave magmount antenna! Although I tried calling the YV4 at one point I knew it was pointless with all the super-QRO stations with big beams calling them. Still, it was good to HEAR such super-DX on 6m (8000kms) with such a simple portable station.

6m AM and noise

Two local tests with stations on 6m AM have shown just how noisy the band can be when using this mode. M1KTA was 18kms away and M1MAJ around 15kms yet both were not strong on the vertical V2000 antenna on 6m AM even when they were using FT817 rigs at 2W AM. We were going to try the SixBox but signals would have been too weak. Switching to USB made a lot of difference (better) unsurprisingly, as the noise level reduces with the bandwidth.

This goes to show how AM signals do need to be strong to overcome the band noise: when signals are a decent level AM is a fine mode, but it can be hard work when they are very marginal with lots of noise in the background.

6m QRP AM tests - Cambridge area

Anyone around near Cambridge/Newmarket/Ely with a 6m vertical antenna who can help me range-test my very simple homebrew 6m QRP AM rig in the next couple of days? SixBox details on this blog and my website. It is working OK but I want to find out how far it gets locally.

Freq: 51.125MHz (sorry only xtal I have at the moment)
Power: 50mW AM
Ant: V2000 vertical
Loc: Burwell, 10m NE of Cambridge, JO02DG

Grandson 2

Our second grandson,  is on holiday with in-laws in Australia. We've just been sent this nice picture of him. He is clearly enjoying himself.