Heathkit

My first introduction to radio was an "Electronics Workshop" kit by Heathkit. If memory serves me correctly this was my Christmas present in Dec 1961. It used a few transistors and othttps://sites.google.com/site/g3xbmqrp3/hf/hw8her parts with spring contacts and wires to configure each circuit.   No soldering was needed.

That Christmas I did my first Medium Wave DXing with one of the circuits and I was very exited to receive stations in the Middle East and Russia.   Other circuits included a very low power transmitter for MW. This used the crystal earpiece as the microphone. As I recall, it got to the next room in the house. This was the kick-off I needed.

Years later I owned a Heathkit HW8 QRP HF CW rig. It worked very well indeed and I worked some decent DX with it. It is such a pity Heathkit is no more as they made some really good kits.

I guess the nearest these days is Elecraft. Sadly Elecraft products are expensive in the UK:  good radios, but far too much. As an example for the price of one KX3 kit (better RX I know, but covering fewer bands) one can buy 2 FT817NDs ready built with a 2 year warranty. And I think we are paying too much for the FT817ND here in the UK!  If the KX3 is fully loaded with mic, ATU, 2m etc, then it is very expensive. The prices are as they are because punters are prepared to pay.

See http://en.wikipedia.org/wiki/Heathkit .
See https://sites.google.com/site/g3xbmqrp3/hf/hw8 .

Sunspots and 10m propagation - Sunday April 19th 2015

Sunspot number has climbed to 114 (K=2) and 10m propagation is expected to be "good" which is the first time for weeks.

This morning my 500mW 10m WSPR is being copied by locals G4IKZ (18km) and G4KPX (14km) but no DX stations yet. I am very hopeful that USA stations will spot me later on 10m WSPR and was hopeful of some decent 10m DX reports this morning too.

UPDATE  1227z:  I was surprised and disappointed to get no DX spots at all on 10m WSPR this morning. Although I still hope for some USA spot later, I am beginning to doubt this. Is it just getting too late in the spring, or have people gone down a few bands?

UPDATE 1320z:  Still only locals spotting me on 10m WSPR - very disappointing

Churches blog - NOT amateur radio

A few weeks ago we visited St Botolph's church in Cambridge. I have just updated the East Anglian Church blog.

See http://eachurches.blogspot.co.uk/ .

USA 10m WSPR spots

As I write this at 1835z, there is still no sign of any USA spots.  

EA8BVP (2986km) has spotted me 34 times so far today but, so far at least, very quiet across the Atlantic.

The band may still open briefly allowing my 500mW WSPR to be spotted over there, but the later it gets the less the chances are of my signal being heard.

UPDATE 2024z:  Well, yet again, I was wrong!  No USA stations spotted me on 10m WSPR today.

Soldering iron mended - and NON amateur radio DIY

I am quite pleased with myself, for once.

Although I still get tired, I seem to be less profoundly tired than I was. Today I managed to remove the plug on a spare 24V Weller soldering iron tool that I found and attach it to the base/24V supply. I checked it works  - it does. So I currently have 2 working soldering irons.

Also, I managed my first (minor) DIY job by repairing a trellis support on our bungalow front wall. I also raked out some dead moss from the front lawn ready to re-seed the patches. In the past, these would have been trivial tasks, but now they are major steps on my oh so slow road to recovery.

Recovery from my cerebellum brain bleed (Sept 2013) is very slow, but I am slowly getting a little better.

Hendricks Kits

These days, with dirt cheap kits from China often with free airmail, it is sometimes a wonder that any USA or UK kit companies exit at all. One of these I have mentioned before is Hendrick Kits, which always has a good selection on their website. These are best value if you live in the USA. Several kits are shown as "retired" which I guess means they did not sell well or they had problems with reproducibility. One favourite is the derivative of the BitX SSB design from Ashlan Farhan in India. This uses easily obtainable parts and has been a well proven design. Hendricks sell versions for 20m or 17m.

See http://www.qrpkits.com/bitx20a.html .

It looks like they have just moved so there might we a little delay until early May.

The power out, around 10W, should ensure plenty of contacts. These 2 bands are usually good even when the sun is quiet, so make a good choice. You have to choose either 20m or 17m SSB. I am sure Western kit companies would really value our business. "Use it or lose it", is a phrase often used about bands. In this case it apples to amateur radio kit suppliers. If we don't buy from them they will close their doors and cease trading. I am as guilty as anyone having recently bought a 40m Pixie kit from China.

From the Hendricks Kit website:

"The BitX20A and BitX17A are complete SSB kits with board, all parts, digital display and custom powder coated and punched case that is based on the BitX20 that was designed by Ashlan Farhan. The original version was built ugly construction, and you had to source all the parts. I discovered the BitX20 site on Yahoo in 2007, and decided that the BitX20 would be a neat kit for Hendricks QRP Kits. The problem was that it did not have a pcb. A team of Dan Tayloe, Jim Kortge and Arv Evans have worked countless hours making sure that the pcb version was stable and would meet United States F.C.C. Specs. We had to go through several revisions to get it right, and we are happy with the result, even though it took a long time. Some things just take time. The kit includes a commercial quality plated through, silkscreened, solder masked board, and all board mounted parts, plus the polyvaricon tuning capacitor, digital dial, custom powder coated and punched case, knobs and controls. Everything you need to build the kit is provided.
I encourage you to check out the BitX20 users group on Yahoo. They have agreed to provide support for the kits. There are hundreds of messages on there about the history and development of this kit. Our kit puts out about 10 watts, features dual IRF510's as finals in a push-pull arrangement. The schematic is available at the Bitx20 site on Yahoo. Cost of the kit is $180.00 plus shipping and handling."

The BitX looks a nice, useful radio. For a beginner it is just about all you need to get started.

472kHz daytime

G3WCB (101km) has been spotting my 5mW ERP from the earth-electrodes most of the morning. My last spot from The Netherlands was at 0528z by PA0RDT although I was spotting PA3ABK/2 at 0552z. When conditions are better I can usually be copied by Dutch stations at almost at any time night or day.

Sunspots and 10m - Sat April 18th 2015

Sunspot number has risen to a very respectable 92 (K=2), but 10m propagation remains "fair" only. I have the feeling I could get spots from the USA later this afternoon. So far this morning, lots of spots from locals G4IKZ (18km) and G4KPX (14km)  and a few spots from UA4UK (2814km). No other DX yet spotting my 500mW 10m WSPR.

UPDATE 1256z:  This morning it was mainly locals spotting me, but RA6WF (3628km) spotting me a few time was, like UA4UK (2814km), most probably single hop F2 propagation. I am still expecting a brief 10m USA opening later.  No earth shattering 10m DX this morning on 10m WSPR.

UPDATE 1500z:  16 spots (so far) on 10m WSPR spots this afternoon by EA8BVP (2986km) and at lunchtime by EA1FAQ (1249km). The EA1 is almost certainly Es judging by the time and distance, although I suspect the EA8 is single hop F2 propagation. I am still hopeful of a few USA spots later.

Sporadic-E (Es)

We are now on the verge of the summer Es season in Europe and the USA, so 50MHz should be good out to about 2000km. Occasionally much further is possible, allowing Asian, South American, Caribbean and North American stations to work Europe.

There is a good explanation of sporadic-E on the UKSMG website.  See http://www.uksmg.org/content/sporade.htm . If you are not familiar with this mode then I suggest you read it.

Es is great fun and just 1W ERP of SSB is enough to work most of Europe, and even beyond, from the UK.  Openings on 70MHz are less common and even less so on 144MHz. There are even more Es openings on 28MHz. If you have a big, high beam and high power it will help, but Es signals are often strong and I have not found QRP is much of a handicap on 50MHz Es. Yes, if you are after tropo or MS DX then I am sure the bigger ERP would be useful, but far less so with Es.

Personally I hope there is far more use made of WSPR this Es season. WSPR allows short openings to be seen: it requires plenty of active stations though. The temptation is to abandon the quieter bands and move downwards.  Before leaving 50MHz, think just how much your presence on WSPR could mean. By staying around and sending or looking for WSPR signals you would be really contributing to radio research.

Field work?

My tiredness is still a problem but I am getting closer to restarting field work at VLF.  I bought a new soldering iron and have found a replacement bit for my old Weller iron (it needs a plug removing before I can use it though) so I should be able to match my 5W earth-mode VLF beacon to the earth-electrodes at this QTH. This will then allow me to do a trip to my first location to see if I can copy the signal. I hope to do all this in the next few days. It may need my XYL to help, but I am sure she will not mind! You may recall, I tested the RX side with Spectran in the lounge a few weeks ago and could copy the earth-electrode VLF beacon (running QRSS3 into a dummy load) using an E-field probe.