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Ok chaps, thanks for giving it a go, I've had a sleep so here's the worst case scenario: Load > 52 > 48 > 52 > 48 > 52 > 48 > 52 > 48 > source What VSWR would you see at the source, and if you were to arrange these lines, for best case, what would you see, so two questions: Worst case...

First off the question isn't one I came up with, the credit for this goes to Steve Hunt, G3TXQ. Considering we've been talking about SWR and transmission lines a fair bit, I thought it might help some of us get a better grip of the subject at hand with this little teaser, I'll post the first...

In this case there is a mismatch, and the greater the mismatch between the load and the line then the greater amount of energy will be reflected, using a 1/4WL of line can act as a transformer when the characteristic impedance of the transmission line is equal to the square root of the load/line...

You appear to regularly declare evidence based reasoning as wrong, I really would like to know what you are basing your theory on, can you provide a peer reviewed source?

I know Bob posted it earlier, but I'll repost what Maxwell has to say about changes in VSWR: Here's another gem from Maxwell: Remember we are only talking about indicated VSWR, not the VSWR at the load

Here's a couple of things for you to consider, if we send 100W toward the load (antenna) and a percentage of that is returned to the source (the rig) let us say 10W, when this is then re-reflected forward it adds to the original 100W thus increasing this figure to more than 100W, let us for...

I use the crappie pole and wire contraption here too and it works just fine and dandy, I have a 10m variant for 40 & 80m that I can attach to the back of my car, I also use one for a near 1/4WL vartical for my backpack kit, so I know they work For info the CB 1/2WL antenna can be purchased...

More to the point a telescopic portable pipe with a mounting bracket and SO239 connector, this enables the antenna to be used portable from 6m-20m as a resonant 1/4WL and in UK can be bought for very little money. If you were to go to a hardware store and buy the parts it would cost a darn sight...

Well summed up Bob ;) One thing to remember is that loss affects the signal in both directions, the signal and it's reflection, it's also important to note that there isn't just one forward and one reflected wave, the reflected wave bounces backwards and forwads a number of times eventually...

Ok chaps, I've been extolling the virtues of using a 1/2WL alloy CB antenna, with the impedance transformer removed, as a viable 20m 1/4WL, this works out well here in the UK, and when I suggested it to a ham in Florida he fancied giving it a go, that's when the Atlantic became an issue :blink...

Don't discount homers suggestion on page one, I've suggested the same to other people before, one. Hap posted his vids on YouTube and did very well with it as a portable antenna, how you deploy the antenna is up to you, however you'll need a non conductive support for the main elements right...

Cooool, wonder if we'll get to see these in th UK, high gain would be sweet ;)

Disagreeing is fine I'm cool with that, however stating that disconnecting the coax is half assed nonsense is a nonsense in itself :confused: it's a certainty that a strike to the antenna will not hit the radio if the coax is disconnected, unless of course you know different, in which case I'm...

That's a bit rich old chap, the guy wants to install a wire dipole, this being the CB section I'm guessing it's for the 27MHz band, want to know the cheapest form of lightning protection, disconnect the feed, now why is that nonsense and clueless? It's effective and at zero cost, that in my...

There but for the grace of God go I:blink: I use all manner of antennas on my car, I'm sure a good number of them aren't bird loading proof either, most need regular servicing if I want to keep them in good condition, but there's no kind of servicing that would help you there. If you can...

I've lived with then metric system since being a youngun, however I still talk about miles to the gallon rather than the litre, I'm 5'10", and my car will do 140mph on a good day, however my antenna mast is 12m high and I have a 1 metre pole out of the top of that, go figure :D As for the...

21st edition here. I've read a good chunk of the book and hoped that by showing a simple graphic, with the details underneath, that people who maybe hadn't spent some time studying the subject could see what I was talking about. One poster questioned the accuracy, whilst making an assumption...

I'm prepared to discuss most things with most people, but that has to be a two way street, if you resort to ad-hominem then there really isn't any point :headbang

I wouldn't disagree, I answered a chaps question as to whether vertical or horizontal is best, I like a freebie, and for DX I'd prefer a horizontal dipole at height rather than a vertical dipole for the reasons explained, it seems some people have taken issue with that :huh: The above said, I...

With respect, I suggest a little reading may lead to enlightenment, I'm not going to argue with you because you believe yourself to be right, I've identified a couple of sources of information that are pertinent to the subject, if you don't have a copy, I'll send you the relevant pages, but...