28 Jan 2014

73kHz UK access?

According to my interpretation of the latest UK frequency allocation table, one can use the old 73kHz band without a license as long as the output is less than 72dBuA/m at 10m under inductive devices rules. Perhaps someone can tell me if I am wrong. A very low ERP is not a handicap as amateur antennas tend to be VERY inefficient.

See http://stakeholders.ofcom.org.uk/binaries/spectrum/spectrum-information/UKFAT_2013.pdf

6m F2 DX

Unless it was a band error, yesterday early morning G4IKZ 18km west of me was spotted on 6m WSPR in Australia over 17000km away by rare 6m F2 propagation. Nick uses about 6dB more power than me and a Moxon beam whereas I use a V2000 vertocal with near unity gain on 6m. I am currently on 6m and living in hope! Solar activity does NOT look promising though.

27 Jan 2014

FT817ND - the perfect QRP radio?

For some time I wondered why Yaesu had not replaced the FT817ND with a more recent model. Then, of course, the penny dropped. This radio, although not perfect, is a good buy at around £500 in the UK.   Basically this is still a very good little radio. Expect a further price drop with the latest £:yen exchange rates.

All it needs are better batteries, auto-ATU and a speech processor, all which can be easily added to the FT817. The KX3 is twice the price of the FT817 and this does NOT include 2m and 70cms all mode. No, for me it will be a second FT817, this time the ND version plus another auto-ATU.

At some point a newer version may appear, but the current version regularly scores well in the eHam reviews (4.8/5) because those who own the radios know just how good they are. Of all the radios I have ever owned and used, the FT817 is the very best, without doubt. Someone called it the "Swiss army knife" of radios.

See the Yaesu brochure at : http://www.yaesu.com/downloadFile.cfm?FileID=618&FileCatID=154&FileName=FT%2D817.pdf&FileContentType=application%2Fpdf

G4KPX

If you get a chance, look at the WSPR spots for Richard G4KPX. Unless he has made recent changes Richard uses QRP with indoor loop antennas and achieves excellent results on every band he uses. For example, his 0.5W 10m log includes a couple of VKs and a good array of stateside stations.  Even on 472kHz he achieves good results.

Back on 10m

After a night looking on 160m RX I came back to 10m TX/;\RX WSPR at 1000z this morning. After a quiet start I am (again) being spotted by 4X1RF and am seeing a station in S.Africa ZS4A (9357km) and Japan JG1KGS (9512km). The band is in good shape yet again. In the afternoon, the band was (again) wide open to the USA and Canada.

UPDATE 1904z:  For me here, the 10m band was STILL open transatlantic at 1904z, VERY late indeed and way after dark..

26 Jan 2014

Top Band WSPR

For a change this evening I've been looking on 160m WSPR with my totally untuned Par 10/20/40m antenna and my FT817.  It is quite amazing what this far from optimised set-up can pick up (see below):
Unique 160m RX WSPR reports since yesterday afternoon
I am unable to TX on 160m, so this is just what I have been able to spot. Best DX was OH6HRX at 1814km.

JT65-HF QSOs on 10m

Today (in between doing the RSPB annual bird count) I had some digital QSOs on 10m with Europe and N. America. The mode works with weak signals but it takes several minutes to complete a QSO. I also tried JT9-1 but there was no activity when I was on. WSPR is easier but does not really support 2-way QSOs whereas JT65-HF and JT9-1 both do.
JT65-HF QSO today

10m - Australia and USA early morning!

Just checked my WSPR spots with 2W on 10m so far this morning (to 1045z) and delighted to see I was received by VK3OER at 16743km and several spots from KD0VWO at 7408km. I have never been spotted in the USA so early in the day! Perhaps this is long path? I see I have spotted JA and VK stations too.
2W 10m WSPR 26.1.14 morning to1045z

25 Jan 2014

10m WSPR still running this evening

Even though the last Stateside DX finished around 1724z, I have left my 2W 10m WSPR kit still running in the hope of catching some 10m GDX this evening, So far nothing heard or seen on the screen.

Heathkit HW8 QRP HF CW Transceiver

Looking back on all the rigs I have owned over the years, the Heathkit HW8 must be up there near the top of the list. I bought mine secondhand ready built in totally unmodified state. It stayed in its original state all the time I owned it. It was eventually sold back to its original owner when I bought a Yaesu FT7 I believe.
https://sites.google.com/site/g3xbmqrp3/hf/hw8/hw8a.jpg?attredirects=0
I could go on the air most days and be sure to work something including plenty of DX on 15m. There are lots of mods on the net but as it is it performs pretty well.  It gets a good score in the reviews on http://www.eham.net . The power out was around 2-3W and the RX a decent direct conversion design. Style-wise it was typical Heathkit - very neat on the desktop. I used mine with the Heathkit PSU.

See https://sites.google.com/site/g3xbmqrp3/hf/hw8 .

These days, the HW8 is hard to find and not cheap, for good reasons.  I liked the looks and performance of mine and regret selling it. I actually preferred it to the 4-band superhet based Elecraft K1 CW rig. If you own no other radios, you can do a lot worse than the HW8. It just works well.  A couple of watts of CW is quite enough to work DX on 20 or 15m as well as loads of UK and EU stations on the lower bands.