Archive for the ‘Uncategorized’ Category

What will solar cycle 25 look like?

We now seem to be, on average, on the downward slope to the next solar minimum. Some are predicting that the next peak will be almost a non-event with the sunspot number peak of just 7. Of course no-one really knows, but I think it is true that most experts now think cycle 25 will be very poor. Conditions on LF/MF are likely to improve but decent F2 propagation on 10m is likely to be rare, except perhaps with N-S paths over the equator.  What is certain is no-one is really sure. Summer Es could well be the dominant DX mode on the higher HF bands.

UPDATE 2048z:  I have now gone QRT (for the night) on 10m but I will be on 160m now and overnight. Back on 10m tomorrow morning after breakfast.

AM on 28MHz and up

Much to my surprise, the RSGB actually published my recent letter to their “The Last Word” column in RadCom, together with a (pathetic) reply from their Spectrum Chair. At least my letter was printed.

The response did nothing to address my concerns. Although the RSGB claims not to be anti-AM, you’d find this hard to believe with a look at the most recent band plans. AM has its place on all bands from 28MHz upwards. I just wish the RSGB and other national organisations would simply acknowledge that this mode has its place. It may be a minority interest mode, but in my experience it is the simplest mode from a building viewpoint.

Internet of Things (IoT) already here

 This morning I received this email from KK4HSX saying that (certainly in the USA) Amazon is already selling wifi connected slow cookers called “Crock Pots”. Not sure if this is a stateside generic term.

It’s already here. Behold,the Crock Pot you can monitor and control with you phone.

http://www.amazon.com/Crock-Pot-Wifi-Enabled-6-Quart-Cooker-SCCPWM600-V1/dp/B00IPEO02C#

Landwade

Landwade was the site of my first “over the horizon” optical tests. The tests were successful, but predate my stroke by some time. I remember well being surprised at the reception when “on beam”.

We go here each year about this time for a delightful walk of about 1.5km calling at the small private church (locked these days). The church is surrounded by seas of snowdrops and aconites at this time of year. Landwade is very quiet at all times. It is in Suffolk but was in Cambridgeshire until 1994. It has been occupied since Roman times, but consists of a few farms, a hall and the odd cottage these days.

I have updated one of my other blogs.
See http://eachurches.blogspot.co.uk/ .

A pity we don’t have an 8m (40MHz) band.

An amateur band at 40MHz would be really useful as I suspect the F2 MUF has been in this region several times in the last few years. There are a very few beacons around 40MHz (UK and Denmark only I believe) but wouldn’t it be good to have even 100kHz around this frequency? Sadly it is very unlikely, but I would happily lose 100kHz at the top of 10m in exchange.   It would also be a very useful Es band.

Somehow I can’t see this happening, more is the pity.  The world of radio science would really benefit. This would have been so much more useful than 146-147MHz recently released to UK amateurs by NoV.  I know a handful of UK amateurs are trying narrowband DTV but the 2m band is mainly Japanese “black boxes” and is mostly white noise in most areas.

Tenner 10m CW transceiver

Click for bigger image.

The Tenner is a very simple CW rig for 10m. It produces about 500mW output and has worked across the Atlantic on many occasions. Offset RX-TX seems to work out at about right, although no special circuitry is employed. This simple circuit just works. Although I used an “at hand” SBL1, any double balanced mixer is likely to be OK. Although I did not try it, a homebrew DBM would be fine.

http://homepage.ntlworld.com/lapthorn/tenner.htm

Pixie kit from China

My low cost 40m Pixie kit – although G1KQH only paid about 60% of what I paid – is on its way from China but has not yet arrived here. I assume, with free shipping, this comes by sea. I am in no great hurry. As I mentioned before, I very much hope to build this unit as I have not built much in ages because of my brain bleed.

UPDATE 1600z:   My kit arrived in the post today.  Still to open the package, but judging by the speed this must have come by air. It looks well packed.


Subscribe FREE to AmateurRadio.com's
Amateur Radio Newsletter

 
We never share your e-mail address.


Do you like to write?
Interesting project to share?
Helpful tips and ideas for other hams?

Submit an article and we will review it for publication on AmateurRadio.com!

Have a ham radio product or service?
Consider advertising on our site.

Are you a reporter covering ham radio?
Find ham radio experts for your story.

How to Set Up a Ham Radio Blog
Get started in less than 15 minutes!


  • Matt W1MST, Managing Editor




Sign up for our free
Amateur Radio Newsletter

Enter your e-mail address: