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Re: LF: Re: EbNaut considerations for tomorrow...

from [DK7FC] [Permanent Link][Original]
To: [email protected]
Subject: Re: LF: Re: EbNaut considerations for tomorrow...
From: DK7FC <[email protected]>
Date: Thu, 06 Jun 2019 21:28:30 +0200
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Hi Luis

Am 06.06.2019 21:08, schrieb VIGILANT Luis Fernández:
The variometer, coil, vertical section and topload hat is all connected to the inner of the coax
Coax ground is connected to the metal pipe which runs inside the building to the basement
Oh this is not ideal and it may rise the QRM and lowers the signal levels significantly. How long is the cable?

The coax cable in the shack is connected to the audio transformer. The other side of the audio
transformer is directly connected to PC soundcard
RR. I suggest to put the transformer on the roof and connect the antenna there. Then the shack earth is decoupled from the 'roof earth' ;-)

Measured at 10KHz. From about -110dB with antenna it drops to -135dB without antenna
That is very good! Anyway, putting the transformer to the roof may lower the QRM.

Yes. I'm doing that. Let's see what can I get
RR, GL, 73, Stefan


73 de Luis

EA5DOM
There is a coax cable from the roof to shack. No transformers at the antenna
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