Автор Тема: MF QRP эксперимент на маленькую рамочную антенну  (Прочитано 1040 раз)

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LF: MF Frame antenna
Когда: 4 августа в 12:56
Кому: rsgb_lf_group@blacksheep.org
От кого: Joe df2jp

Hello, folks,

 

since my QTH has changed and the antenna possibilities are rather bad, I decided to build an RX-frame antenna.

During a conversation with Peter, DC0DX on UHF :op it turned out that Peter still had a meander-shaped frame antenna in the corner. the cross has 150cm. In the course of the conversation the question came up: Isn't it also possible to transmit with it? Should work, you only have to add another C to the coupling loop to adapt it to the TX.

Since my frame isn't finished yet, Peter did the first tests at the weekend.

 

2019-08-03 09:24  DC0DX  0.475725  -6  0  JO31lk  0.001  DC5AL-R  JO31lk  0  0
2019-08-03 09:08  DC0DX  0.475725  -28  0  JO31lk  0.001  DC5AL-R  JO31lk  0  0
2019-08-03 08:54  DC0DX  0.475725  -7  0  JO31lk  0.001  DC5AL-R  JO31lk  0  0
2019-08-03 08:38  DC0DX  0.475725  -7  0  JO31lk  0.001  DC5AL-R  JO31lk  0  0
2019-08-03 07:24  DC0DX  0.475725  -19  0  JO31lk  0.001  DC5AL-R  JO31lk  0  0
2019-08-03 07:08  DC0DX  0.475725  -18  0  JO31lk  0.001  DC5AL-R  JO31lk  0  0
2019-08-03 06:38  DC0DX  0.475725  -19  0  JO31lk  0.001  DC5AL-R  JO31lk  0  0



2019-08-02 22:54  DC0DX  0.475725  -20  0  JO31lk  0.001  DC5AL-R  JO31lk  0  0
2019-08-02 22:38  DC0DX  0.475725  -22  0  JO31lk  0.001  DC5AL-R  JO31lk  0  0
2019-08-02 22:08  DC0DX  0.475725  -22  0  JO31lk  0.001  DC5AL-R  JO31lk  0  0
2019-08-02 21:54  DC0DX  0.475725  -27  0  JO31lk  0.001  DC5AL-R  JO31lk  0  0

The two stations are only 5 km apart, transmission power approx. 500 mW, transmission location in the Shack!

Until 08.30 o'clock the loop was directly connected, from then on the 2nd Dreko was added, you can see the difference.

At 09:03 Peter had turned the frame by 90°.

 

Here is a picture of the experimental setup

 

 

I find this very remarkable, considering the holiday and summer time there is hardly anyone qrv on MF, with the loop optimized until autumn some stations should already be added.

 

73 Joe
« Последнее редактирование: 04 Август 2019, 16:55:27 от rw3adb »
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