AmateurRadio.com

Deutsche Welle (DW) is closing its last relay station, which is in Kigali, Rwanda. In recent years DW like many shortwave broadcasters, has been facing financial cutbacks. Also there are far fewer broadcasters using shortwaves these days.

As a youngster in the 1960s, I recall shortwaves crowded with AM broadcast stations, many from all over the world transmitting in English, with their distinctive interval signals. There was a magic about shortwave broadcasting back then. Quite a few could be copied with very simple receivers too. There is something quite nostalgic about listening again to those long-gone interval signals from behind the Iron Curtain. I remember getting some excellent freebees from China back in the early 1980s. Of course, it was all to spread the propaganda.  All I really wanted was their QSL card!

These days, users are often reached using the internet. Of course, it begs the question, “who is now filling the empty, vacated channels?”  In the long run amateur radio might gain some allocations, although the noise floor on HF is increasing too. SMPUs, cable TV and numerous other sources are mainly to blame.

See http://www.dw.de/deutsche-welle-closes-kigali-outpost/a-18340960.

My assembled 40m Pixie

The Pixie is a very simple HF transceiver. Usual power out is in the 200-1000mW region, depending on band and DC power source.  It was first developed some years ago but the basic concept is using a PA transistor as a mixer in a simple direct-conversion receiver. On TX this is used as the TX PA.

Being simple, it has a number of limitations but it certainly works. A major issue can be AM broadcast breakthrough, although my 40m version is perfectly usable. I was very impressed with my little kit that came with all parts including a silk-screened PCB, all sockets and a crystal. It needed low-Z Walkman type headphones, a morse key and battery – that was all. On 40m the sensitivity is pretty good with 0.5uV clearly audible and my RF power out is around 400mW. A lack of both RF and AF RX selectivity is also noticeable.

Kits are available from several sources at prices that are hard to beat. I recently bought a kit for $10 with free airmail from China. It is available for less than half this price I subsequently found out. Unbelievable for a fully functional HF transceiver. Of course, being so simple you may prefer just to build it dead-bug fashion. I bought a kit as I wanted to see how my building skills were.

As a mature design, it has been through several iterations, some improve the basic design, but most do so at the expense of increased complexity. You’d be hard pressed to find a circuit for a complete HF CW transceiver much simpler.

See www.gqrp.com/The_Sprat_Pixie_File.pdf .

See http://www.ofcom.org.uk/content/about/annual-reports-plans/ann-plans/Annual_Plan_Statement.pdf .

Sorry, but this CRAP shows what OFCOM plans are for the year ahead. In an executive executive summary (mine) I would summarise this as,”continue to be a bureaucratic quango”.

It looks like it was written by a young, overpaid, headless chicken. Lots of “informed choice” and similar buzz words. Rubbish in my view. No-one there seems to be able to make decisions based on the use of a brain and common sense.

Give OFCOM some real power and let them make common sense decisions. My recent discussions on VLF/LF experiments are just an example of their total inability to think “out of the box”. Sorry, but as an OFCOM “customer” I am left very unimpressed.

Opinionated, me?

Up to now, the Japanese “big boys” such as Icom, Kenwood and Yaesu have pretty well dominated the amateur radio market, but the Chinese are on the march. Only last month I bought a 30W pep all mode rig for 10m: this was made in China. See also yesterday’s post about 40m Pixie kits at ridiculously low prices.

Be in no doubt: within a few years we will see the amateur radio market flooded with quality products made in China with low prices. At this point, the traditional Japanese brands will die out or be made in China. By the next solar minimum in around 4-5 years time the dynamics of the commercial amateur radio market will be very different. The writing is already on the wall.

Up to now most Chinese amateur products have lacked the finesse of Japanese products but this is rapidly changing. We are fast approaching the time when Chinese made amateur products will be every bit as good as Japanese products, but at very much lower prices.

In the end competition is healthy but this is likely to result in the death nell for all manufacturers not in China. We could well see the death of Ten Tec and Elecraft unless they design in the USA and make in China. The volumes of loyal customers who would be willing to pay USA manufacturing prices would be far too low, sadly.

Of course, we have already seen this with most consumer products and white goods. In the end, China will become too expensive and we will look for slave labour rates elsewhere. Sadly we live in a very odd world. This cannot go on for ever, but we are all complicit. At the moment we are exporting most of our manufacture to China.

I bought my 40m Pixie kit for $10 and thought this was a bargain.  Then Andy Cutland sent me this link.

Hi Roger, this is the cheapest i’ve seen yet. What fantastic value !

Check out this item I found on eBay:

End time: 15 Apr 2015 10:33:10

Item: DC DIY RADIO CW Shortwave Transmitter QRP Pixie Tool Receiver 7.023-7.026MHz

URL: http://pages.ebay.com/link/?nav=item.view&id=131457860419&alt=web

(Sent from eBay Mobile for Android)

At £3.19 with free shipping there is no way you could make this cheaper in my view. Remember this price includes a crystal, PCB and all the board mounted parts.  This looks identical to mine which works very well. This is a refined Pixie and performance has exceeded expectations. Netting is excellent TX to RX and AM breakthrough very modest. My power out is about 400mW and a 1uV signal level very good on RX. A totally usable 40m CW rig for not much more than a cup of coffee.

Even with the after-effects of my cerebellum brain bleed I was able to build the kit without any issues.

I have mentioned this before, but I am truly amazed that Yaesu has not updated the FT817.  OK, I have heard the “if it ain’t broke don’t fix it” argument but on simple commercial arguments I think they must be stupid. There is a worldwide market (500000?) ready to upgrade yet I think they have now missed the window of opportunity as sunspot numbers are falling.

I wonder if any sharp eyed, sharp eared readers have heard any rumours of an imminent replacement?

We are currently experiencing the most severe solar storm in very many years with HF very badly disturbed. There are auroras expected far further south than normal. This is a result of a CME event on the Sun interacting with the magnetic field of our planet.

If the weather is clear, check for a visual aurora!

It is also worth keeping eyes and ears alert for auroral propagation on 10m, 6m, 4m and 2m. I have in the past worked stations via aurora using QRP SSB and CW with very simple wire antennas on 10m and 6m. As frequency goes down SSB becomes more possible. What may be a very rough hissy CW note on 2m maybe a fairly decent SSB signal on 10m. The 10m and 6m bands are very worth a try when there is an aurora about.

See http://spaceweather.com/ .