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Re: LF: Re: Schumann in my garden

To: [email protected]
Subject: Re: LF: Re: Schumann in my garden
From: DK7FC <[email protected]>
Date: Mon, 06 Oct 2014 01:04:07 +0200
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Hi Edgar,

Thanks for the comment. Well, i thought there are no unwanted signal sources in my garden, not in a radius of 400m. But maybe some HF stuff reaches the gate through the air, or some charged humidity. Probably you are right. And i can increase the C across drain-source by a factor 10. Next version... Hopefully there is good WX tomorrow.

73, Stefan

Am 06.10.2014 00:51, schrieb edgar:
Hi Stefan,

I suggest that you cover the LPF and FET with a piece of tin to stop any external signals entering the circuit after the LPF.

A thin piece of metal from coffee tin or similar food container can be bent in a U shape to cover the components and then soldered at a few points to the copper ground plane.

Just leave a small clearance holes at the ends for the wires to pass through.

Regards, Edgar
Moonah, Tasmania.


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