For convenience, I generally use my 14Mhz delta at 28Mhz. I was interested to see how well a magloop I built last year, nominally for the 15m band, would do in comparison to the delta.
The answer, in brief (for once!) is that the magloop, just ~40cm in diameter, performs at least as well as the delta, and probably a bit better for DX (because the delta's pattern at 28MHz is fairly high).
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| Let's play 10m! |
And to think that, if you want to buy a magloop, it's a minimum of about £400, three times that for the more 'professional' versions, although, ultimately, there is nothing to any design of magloop other than a bit of metal, a capacitor, and a means of turning the capacitor!
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| Receiving stations (FT8) mid-afternoon. |
2 comments:
Hello John, new designed magloop? For "gamma match" I just see a wire fron the cap clipped on the loop somewere? Interesting....73, Bas
Hi Bas. No, it's not new. The connection for the feed is as follows: 4:1 balun, one side goes directly via a short wire to the bottom of the first loop, and the second side goes via a wire that provides some loop mode induction, and terminates at a (temporary) croc clip near the top of the first loop. Matching is very stable with this method. The capacitor is connected only on either side of the gap at top of the loop.
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