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| To: | "LF-Group" <[email protected]> |
|---|---|
| Subject: | LF: "T" versus "L"aerial |
| From: | "Dick Rollema" <[email protected]> |
| Date: | Sat, 27 Dec 2003 15:09:07 +0100 |
| Reply-to: | [email protected] |
| Sender: | <[email protected]> |
|
To All from PA0SE Further to my e-mail of 26 December I measured the field strength as radiated by the aerial in Inverted L-configuration. From this I found EMRP = 57 milliwatt. This confirms the benificial effect of top loading. The T-aerial radiated 140 milliwatt. So going from a single 20m top load wire for the "L" to 2 x 20m for the "T" resulted in an improvement by a factor 2.46 (3.9dB) in radiated power. The vertical part of the "T" consisted of an open wire feedline of 11m with the two wires connected in parallel in the attic shack. For the "L" one of the feedline wires was removed. I assume this did not appreciably affect the EMRP. 73, Dick, PA0SE |
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