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Re: Receiver working, sensitivity issues?


 

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I¡¯m actually amazed that you are doing as well as you are. ? There is a concept called ¡°aperture¡±that relates to the volume of space from which a given antenna extracts signal

If you have more aperture, you have more signal captured. A 1 m loop I think will have a very small aperture

Luckily at home frequencies, we work with signals that are not at the very bottom of the capabilities of most receivers. That¡¯s because the background noise just from the galaxies lightning storms etc., is considerable.

However you face the additional hindrance that you have buildings around you and those absorb power from incoming signals that have to pass through them based on their geometry. ?If the only clear sky you can see is directly above you, then only signals that come in from that angle will be unhindered

Wise person has said that the best antenna is to get ¡°as much wire as you can, as high as you can, and then match to whatever its impedance is.¡±

I thought that was worth remembering!
It might give you further ideas.


Gordon Kx4z?

On Jun 3, 2021, at 21:33, Curt via groups.io <wb8yyy@...> wrote:

?Simran

For receive try stretching out 8m or more of wire. The ubitx was optimized? for full sized antennas, but 8m or more should bring some signals.?

Patiently learn about ham radio antennas. To get RF across coax with minimum loss, the antenna needs to be nearly matched. The EFHW was mentioned, it uses a special network to feed it at one end. Read resources on the web and watch video on basic antenna theory.?

Maybe your nation is very much still in pandemic, use the time to learn. Meanwhile use whatever wire you have to hopefully grab some signals.? Use headphones then the signals should be louder.?

Glad to have you joining global ham radio.?

Curt wb8yyy

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