AmateurRadio.com

Well ... my new 1930's style MOPA transmitter is finally finished after several months of construction. I have also put together a page on my website describing the project.

For many years, December's high winds here on the coast, have always arrived coincidentally with the start of the annual 1929 QSO Party, making my signal dance around even more than usual! With the new MOPA, I'll no longer have to worry about high winds upsetting signal stabilty ... although many of us do enjoy hearing these musical sounds of '29!

By the way, there's still plenty of time for you also, to put something together for this annual fun event. You can see a whole page-full of inspiring '29 homebrew magic here (scroll to the bottom half) ... and there is plenty of help available for your project in the AWA Yahoo Builders Group ... we are always looking for more new activity, particularly here out west.

courtesy: natubes.com/

The new MOPA uses two type '10 tubes (like many, I use the war-time type '10 equivalent, the more affordable VT-25), one as a Hartley oscillator and the other as a Class-C final amplifier.

I'm looking forward to working many of you in the next '29 QSO Party ... in the meantime, I'm thinking hard about what my next project might be!







Steve McDonald, VE7SL, is a regular contributor to AmateurRadio.com and writes from British Columbia, Canada. Contact him at [email protected].

Well, I had a letter today from an amateur in South Africa who I hear have been allocated a small band at 40MHz. There are already a couple of EU beacons around 40MHz (OZ and G).

It would be so good if OFCOM here in the UK saw the real value in even a very small, shared band around 40MHz. Instead, we get given chunks (1MHz at 2m and 1MHz at 4m) which will hardly get touched by most. Surely a small 100kHz shared band at 40MHz that would really be of value to radio science has merit?

Of course, allocating ad interim chunks of unused spectrum to the amateur service is a “no-brainer” for dear old OFCOM. Fine doing this, but there would have been far better options, but these would have needed brain engagement, so out of the question? I hope that the RSGB and OFCOM talk some more and add new bits of spectrum soon.

Roger Lapthorn, G3XBM, is a regular contributor to AmateurRadio.com and writes from Cambridge, England.

There was an announcement on the RSGB and OFCOM sites advising some UK full licence holders that 70.5 to 71.5MHz is being made available for one year by special permission for further digital experiments, a bit like 146-147MHz here in the UK.

Sorry, but has OFCOM gone stark raving mad???

I can see no good justification for this 1MHz of spectrum. 2m was already under-used and the 146-147MHz allocation is probably being used by a tiny handful of people from time to time only.  DATV tests could quite as easily happen at 70cms.

I can think of far better parts of the spectrum OFCOM could have allocated e.g 100kHz around 40MHz (for Es propagation experiments), 73kHz, below 8.3kHz and a contiguous 5MHz allocation. Oh no, these require a brain to be engaged by OFCOM people.

Maybe this is an April fool’s wind-up, although  I suspect it is true.

Surely if OFCOM wants to further real experimentation in radio science there are better ways of going about it?  Yet again, I am totally unimpressed. Between OFCOM and the RSGB, I think this is, yet again, a stupid stupid decision. So we now have 2MHz of extra spectrum for 12 months that a very few might use. Big deal. OFCOM, engage brains, think radio science. If you want to help grow future engineers that we so badly need, these allocations will not help at all. Think again!

See http://www.rsgb.org/ .
See http://www.70mhz.org/ .

Roger Lapthorn, G3XBM, is a regular contributor to AmateurRadio.com and writes from Cambridge, England.

My site has been down for a few days due to a “security problem” that I encountered. it seems that some malware showed up on the server and my host disabled the site. It took a bit of ftp’ing to get the offending files removed but we are back on the air.

I can’t say for certain how the bad guys got into the site but it would appear they were specifically targeting sites using WordPress. I was already running a security plugin for WordPress but since the attack I’ve tightened up the parameters considerably. If I inadvertently locked you out, my apologies.

It is interested to watch how many attacks are reported by the security plugin, mostly from locations outside of the US. If you are using WordPress and don’t have a security plugin installed, I highly recommend installing one and locking things down tight.

73, Bob K0NR

The post WordPress Security appeared first on The KØNR Radio Site.

Bob Witte, KØNR, is a regular contributor to AmateurRadio.com and writes from Colorado, USA. Contact him at [email protected].

For me South America, Australia, and Africa are quite rare on WSPR. But they all heard my tiny 0.2 W signal the night between 31 March and 1 April in addition to North America, Asia and Europe. That’s a new one for me and worthy a brag post on the blog, I think! Hopefully, it may also inspire others to try low power WSPR.

In Australia and South America I was heard on the 10 MHz band, in Africa on 21 MHz, in Pakistan on 14 MHz, while 7 and 10 MHz worked into Siberia. North American stations also heard me on the 7 and 10 MHz bands.

This was on my untuned 80 m horizontal loop fed with open-wire feeder and a 4:1 balun. This shows both that the bare-foot Ultimate 3 kit is very tolerant of loads with SWR much different from 1, and that WSPR gives amazing results.

Sverre Holm, LA3ZA, is a regular contributor to AmateurRadio.com and writes from Norway. Contact him at [email protected].

For me South America, Australia, and Africa are quite rare on WSPR. But they all heard my tiny 0.2 W signal the night between 31 March and 1 April in addition to North America, Asia and Europe. That’s a new one for me and worthy a brag post on the blog, I think! Hopefully, it may also inspire others to try low power WSPR.

In Australia and South America I was heard on the 10 MHz band, in Africa on 21 MHz, in Pakistan on 14 MHz, while 7 and 10 MHz worked into Siberia. North American stations also heard me on the 7 and 10 MHz bands.

This was on my untuned 80 m horizontal loop fed with open-wire feeder and a 4:1 balun. This shows both that the bare-foot Ultimate 3 kit is very tolerant of loads with SWR much different from 1, and that WSPR gives amazing results.

Sverre Holm, LA3ZA, is a regular contributor to AmateurRadio.com and writes from Norway. Contact him at [email protected].

The KX3 being used in my lap.

It's the Easter weekend and I normally get the Friday and Monday off work but this year I decided to also take the Thursday and Tuesday. Today was to be a great day with the temperature in around 17C the forecast was for sunny skies in the morning and early afternoon but then rain rolling in for later in the day. I decided early in the week that with the nice weather I was going to make today an outdoor radio day........well from the car just a bit muddy and wet to setup outside just yet. I took  my Elecraft KX3 and some mono band HF whip antennas that attach to a mount on my car. I set my sights on 15m and the conditions seemed great and the DX was rolling in. For the time I was on the DX contacts that I made were:
1. I1YRL from Italy and Luc was very strong and no fading what so ever. While talking to him I found out that in the summer of 2014 he and his wife visited Toronto. Luc gave my 5 watt QRP signal a report of 579. Luc was very surprised I was QRP 5 watts using a mobile whip from my car. 
2. EG90IARU/5 this was a special event  again they were booming in and I was able to make the contact on my first call. This was a very fast contact with the usual 599 report.
3. IT9NJE and Gene again from Italy gave me a 549 signal report.
Over all I was very pleased with my hour on the radio from the car out in the park. I was happy I did not have any Murphy moments but I did have an "old age" moment..................I installed the 15m mono band whip antenna on the car. For some reason (old age) I set the KX3 to 20m and could not understand why the antenna tuner was needed everywhere on the band! Then in occurred to me I was on 20m using my 15m antenna. Once that was sorted out the morning went very well.
Mike Weir, VE9KK, is a regular contributor to AmateurRadio.com and writes from New Brunswick, Canada. Contact him at [email protected].