******** The Official amateur radio thread ********

http://websdr.org/ is an index of web based receivers you can mess around with.

As a general rule of thumb, the lower bands (1.8MHz, 3.5MHz and 7MHz) go 'long distance' overnight and are local during daylight hours. By local I mean UK and Europe.

The bands from 14MHz upwards will be open during the day and dead when it's dark. 28MHz, 24MHz and 21MHz will start producing results in the morning from the east and the openings will move around to south america and then north america in the afternoons. 18MHz and 14MHz are the sams but not quite so pronounced.

The time of year makes a big difference as well.

Radio propagation is a fascinating thing :)

Incidentally, I wasn't able to sort my smartuner at the weekend. I deinstalled it and checked to make sure there was no problem with the power supply. Once I'd determined that was OK I checked the tuner itself. This is what I found.

SGC-237_waterlogged-20120116-203113.jpg


It's supposed to be totally waterproof at 2ft depth for 24 hours. It's clearly not! That's been nailed to a wall on the outside of my house for around eighteen months but I've not actually used it since June last year and there's no way there should have been that water ingress through it just being fixed to a wall in a fairly sheltered location.

It's now gone back to the supplier for refund or replacement (I doubt it's repairable) as even though it's outside the one year warranty period, it's clearly not fit for purpose. I'd happily have another one and would modify the installation to ensure it's protected as it's obviously not as waterproof as it's supposed to be.
 
Feeling a bit overwhelmed :D
I've always said there's a lot to the hobby, it's not just talking to Vlad in The Ukraine and discussing the weather :)

Do you ever get conversations with more than two people?
Yes, regularly. The lower bands which are good for UK/EU propagation during the daytime have a lot of 'nets' on them. They're often arranged by clubs and groups and a lot of people partake.

The first time I spoke to ZL (New Zealand) it was two Kiwis talking to each other inviting others to call in. That was a nice contact.
 
It's supposed to be totally waterproof at 2ft depth for 24 hours. It's clearly not!

I was looking at those before and didn't really rate their waterproofing idea, it looks like a foam strip? All the IP enclosures I've seen use a compressible silicone rubber strip and a drain channel at the very least. I bet frost soaked the foam and forced it apart.

That 24hr test is easy to pass, as there are no temperature stresses going on. I noticed more than one guy stick his in a second box.

Check the site for their waterproofing requirements before you talk to them, just in case they wiggle out of it. Bad luck though, I hope they can replace it for you.
 
I've been operating in a contest today, exclusively on the 21MHz (15m) band and here's an approximate map of the people I've spoken to. I say it's approximate because it's not possible to locate people exactly just from a quick exchange of callsign, signal report and serial number.

I'll do some more tomorrow morning, fill in some more Europeans and hopefully some far East as well, possibly VK and ZL (Australia and New Zealand).

15m_today-20120121-230450.jpg
 
Not a good morning.

I managed another 25 or so contacts and then my aerial failed.

The first indication was my amplifier cutting out so I bypassed it and did a quick check on the VSWR which was showing high - Plugged the analyser into the aerial and this is what I found.

Aerial_analyser-20120122-104606.jpg


It looks as though the balun at the feedpoint of the aerial has failed. The figure to the right of the frequency which reads 2.9 should be as close to 1.0 as possible and the impedance should be 50 ohms, not 142.

A quick google shows me that this is a weak point and prone to failure. I can't do it today but I need to lower the aerial check this and then it should be a simple fix.

My final map for the weekend is this:

Hungarian_DX_Contest-20120122-104419.jpg


Not as good as I'd hoped but hopefully it'll be enough to win the division I plan to enter.
 
Not a good morning.



Oooops yours is brand new too :eek: not the quality i would expect when paying £500. I have read about burnt-out traps on earlier models, I would expect much better from Cushcraft. poor quality, Moonraker yes - Cushcraft no.

The fibreglass holding the elements together looked shoddy to me.
 
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Hmm didn't notice the OCuK radio club before :p

Well I got my intermediate license yonks ago mainly for some outwards bound programme with lots of 13 year olds to organise and marshal. I must say that I never got into it to any real extent, only occasionally using a couple of little hand helds and my old man's serious mast. It's nice to see that there are more people lurking out there :)
 
Hmm didn't notice the OCuK radio club before :p

Well I got my intermediate license yonks ago mainly for some outwards bound programme with lots of 13 year olds to organise and marshal. I must say that I never got into it to any real extent, only occasionally using a couple of little hand helds and my old man's serious mast. It's nice to see that there are more people lurking out there :)



My word... they get everywhere :D
 
Oooops yours is brand new too :eek: not the quality i would expect when paying £500. I have read about burnt-out traps on earlier models, I would expect much better from Cushcraft. poor quality, Moonraker yes - Cushcraft no.

The fibreglass holding the elements together looked shoddy to me.
Funnily enough, that fibreglass isn't a regular point of failure but the balun and the traps are.
Mine was new but second hand, the original owner bought it a few years ago but due to deteriorating health it was never put up. It never even came out of the box. I believe that it was from the days before MFJ took over Cushcraft so it should be decent quality.

I'm pretty sure the problem isn't with any of the traps because if it was, only some bands would be affected but they all are, hence my feelings that it's the balun.


Hmm didn't notice the OCuK radio club before :p

Well I got my intermediate license yonks ago mainly for some outwards bound programme with lots of 13 year olds to organise and marshal. I must say that I never got into it to any real extent, only occasionally using a couple of little hand helds and my old man's serious mast. It's nice to see that there are more people lurking out there :)
My word... they get everywhere :D
We do! It's surprising how many people have taken the foundation and intermediate licences and then not really used them. There was a thread on here a couple of years ago and a few people said they've done it but let it lapse. It's a shame but at least it's there if they want to come back to it in the future.
 
Solar Cycle 24 should peak next year, it really started taking off about four or five months ago. It's fantastic! Radio conditions at the peak of the cycle have to be heard to be believed. The band that really benefits is the 10m (28MHz) band and it's been really good for a while now. It's the band I've worked the most countries on, I'm up to over 130 on 10m now with a huge chunk of those being in the last few months.
 
Thanks Rob :)

I've sorted the aerial - Or at least I've found the problem. Clearly a weak point, one of the coax tails between the matching network (balun) and the 12m/17m dipole was faulty so I've removed it which has got me going on 10m, 15m and 20m and I'll get it replaced next weekend when I can manufacture a new tail.
 
Thanks for posting this Feek. I've been a "radio professional" for some 10 years, working mostly in cellular network design. Too much of that work is just system engineering now though, plugging black boxes together. I'd like to get back to basics so have signed up to do my foundation exam with the local club. Looking at the syllabus, I think I pretty much know all the technical stuff for Foundation and Intermediate. Just need to learn some of the licence and protocol stuff. Hoping to run through them as soon as the club can arrange it.

I'm attracted to it for the same reasons as you, the independence. The Internet and regular phone networks are pretty vulnerable, and could easily be lost a disaster scenario. Do you know anything about how, the protocols etc, hams interact with emergency services and authority?
 
I have just stumbled across this thread as I am embarking on taking my amateur radio foundation licence. I am wondering what UK or international forums people recommend and use on these matters, a lot of UK ones seem to be either inactive, or have very low activity. I am having a discussion on a vintage radio forum as I particularly like older gear, but would also consider modern stuff. Has anyone any experience of the ex military trailer based extendible masts that are sent up by compressed air or similar means?

Here is my post on the vintage forum, maybe someone has an opinion here on this, too? Thanks.



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I am studying for my foundation level UK amateur radio test and am looking at radio gear. Whilst all the modern stuff from Icom, Kenwood et al looks nice, is small and efficient in its use of space, and is probably very reliable, I still hanker after something big and beautiful, that looks like something from a 50's or 60's film. I have the desk space, and have decided to ask if I am mad for considering old gear for this purpose? I have an inkling of electronics knowledge, but definitely not a vast amount, but I am keen to learn further. I have basic test gear. I have basic soldering and de-soldering gear. I am as much or more interested in the social side of chatting to different people around the world as I am in tearing the thing apart on a regular basis.

My questions are:

How much less efficient is vintage gear than the modern plastic box stuff?
I would value something of beauty as well as something of excellence. How much am I looking to spend on something that looks mint, works out of the box, has a classic pedigree and has the ability of still being repaired, and still has most common failure prone bits available?

I am in a low lying Shropshire hamlet, and feel working very high frequencies via repeaters is just like using my cellphone, but with more hassle and limitations, so am thinking of going HF bands to start with. I am lucky enough to have a lot of outdoor space so big aerial installations are not an issue, but I do not want the place to look too indiscreet to neighbours. I am not interested in portable usage, just home base station work.
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