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| To: | [email protected] |
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| Subject: | Re: VLF: Finally back on the 58 km band... |
| From: | DK7FC <[email protected]> |
| Date: | Wed, 27 Dec 2017 15:32:30 +0100 |
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Am 27.12.2017 15:20, schrieb Paul Nicholson: As you can see, the problem with H S/N at this frequency is still there. I can say with confidence it is not the rx and probably not the antenna. So what is it? QRM by power lines, or, in other words, the location?You need a wide power loss like EI8JK in my 7th(?) kite experiment. Then the QRM is low and you can see the difference :-) Or is it the isolation transformer maybe that causes IM?Maybe it helps to build a portable RX system (Raspi+octo) to test the antenna as it is now in this location. And then, in a second test, build a similar antenna and test it in q quieter location, using the same preamp and transformers... 73, StefanPS: Here, just completed the 13th of 14 layers of the first of 3 coils for a 970 Hz transformer... |
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