Chris I'm planning something like that with large loops, though, in my case it is for diversity reception using a dual sdr. David G3UNA

Hi Simon Your practical experience re tube v wire is invaluable; I note you say your copper loop is larger than the wire loop under consideration. Looking at your pics it is evident that you are in an

Paul I didn’t follow whether you are using this loop for transmit and receive. The answer to use tube indicates that you are using it for both. Do be aware that improving ie reducing losses also makes

Chris I remember those days of HF echoes. I had a very severe case a few years ago when the echo time coincided with the spaces between characters and all I heard was a long tone till conditions chang

Hi Simon Suggest you go to W8JI site who did detailed analysis on loaded vertical. His simulations are usually EZNEC and he may not give the full data just the results, take a look. If you want a real

Hi Probir I can vouch for the quality of the units, it's all you would expect from a professional outfit. As to the schematics: these are not available on the reasonable grounds of design theft. 73 Da

Hi Tom I have those instruments but have used them very little so far. I often see comments on their use that indicate we always need a strong signal from the sense aerial, close to the noise source i

Hi Tom Sorry to hear about your neighbour's noise, it's a common problem and you have introduced what sounds like a decent solution. I wonder if you might have tried using one of the phasing boxes tha

There are lots of cheap little plastic boxes sold as food containers. These are made of soft plastic and easy to make holes. Local supermarkets have a huge selection. Even cheaper are cardboard gift b

Yes, it’s small enough and light enough to be supported by tie wraps in a cable bundle. David G3UNA

Hello Perseid? It would be nice to know your name and perhaps where you are located so we can properly advise you. A battery supply is ideal from the point of view of low noise, as long as you always

Simon Personally, I wouldn't advise that. I have extensive experience in this field and would not advise anyone to handle mains voltage unless well clued-up. I dare say that are, but folks out there m

Tony I can’t immediately see any benefit but I can see problems. Say the supply is on and output capacitor is charged. You switch off and with your load detached and all the capacitors start to discha

The biggest weakness I found many years is the rating of the main reservoir capacitor. I've seen as low as 16V, however, even 25V rating can be marginal in some circumstances. Oddly, running the suppl

Simon Use a half moon edging spade to make a cut one inch deep then push the wire in as you go. Walk along the cut and it will seal very quickly. Buried radials like this cannot be resonated in the us

Such is the mix for amateur radio David G3UNA

The radial wires don't need to be thick. Stay away from flex weave in my opinion, use solid wire. Those tiny wires very quickly dissolve. Cheapest wire I know that is regularly available is house wire

You might consider this dead cheap overflow pipe from Screwfix and others https://www.screwfix.com/p/floplast-overflow-pipe-white-21-5mm-x-3m/68593 It's £1.28 for a 3m Length. It bends quite easily an

I think what it comes down is what materials do you have to hand and do you want this to stand up to the weather. For receiving only, a piece of wire on a frame will work fine and then you think about

For low power, these look attractive https://uk.farnell.com/sac/ae5030/power-supply-12v-100ma/dp/3762908 David G3UNA