{"id":103,"date":"2022-01-19T14:54:27","date_gmt":"2022-01-19T14:54:27","guid":{"rendered":"http:\/\/m0aws.co.uk\/?page_id=103"},"modified":"2022-01-19T15:49:16","modified_gmt":"2022-01-19T15:49:16","slug":"30m-band-delta-loop","status":"publish","type":"page","link":"https:\/\/m0aws.co.uk\/?page_id=103","title":{"rendered":"30m Delta Loop"},"content":{"rendered":"\n

This is a great antenna for the 30m Band, super quiet on receive, good gain through the loop and will fit nicely into the average U.K. garden.<\/p>\n\n\n\n

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30m Band Delta Loop<\/figcaption><\/figure>\n\n\n\n

The antenna comprises of one long piece of 2.5mm wire 31.5028m long arranged into a flattened triangle. Wire 1 as shown above is exactly 14.5m long and must be exactly 1m above the ground. Wires 2 and 3 are 8.5014m long with the peak being exactly 5.44m above the ground.<\/p>\n\n\n\n

The antenna is best fed via a 1:1 balun at one of the bottom corners (Shown by the circle in the image above.)<\/p>\n\n\n\n

The antenna presents an almost perfect match to a 50 Ohm feed and so no other tuning is required.<\/p>\n\n\n\n

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30m Band Data Loop SWR plot<\/figcaption><\/figure>\n\n\n\n

I am currently using this antenna at my U.K. QTH, it’s unbelievably quiet on receive with noise being less than S2 making it very easy to hear even the most weak of DX station.<\/p>\n\n\n\n

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30m Band Delta Loop Elevation Field Plot<\/figcaption><\/figure>\n\n\n\n

This antenna doesn’t have massive gain at 1.42dbi @ 26 deg but, being so quiet on receive makes it a great choice for the 30m band. It is worth mentioning that I rarely hear other U.K. or close E.U. stations on this antenna, this is most probably due to the large null in the centre which attenuates signals arriving from a high angle.<\/p>\n\n\n\n

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30m Band Delta Loop Azimuth Field Plot<\/figcaption><\/figure>\n\n\n\n

Most of the radiation is through the loop so keep this in mind when erecting the antenna.<\/p>\n\n\n\n

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30m Band Delta Loop 3D Field Plot<\/figcaption><\/figure>\n\n\n\n

With an almost squashed ring donut shape and a deep null in the centre, this antenna is superb for working weak signal stations on the 30m band.<\/p>\n\n\n\n