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Re: LF: Anyone good with Elsie?

To: [email protected]
Subject: Re: LF: Anyone good with Elsie?
From: DK7FC <[email protected]>
Date: Thu, 23 Aug 2018 14:27:18 +0200
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Ehm sorry, rather add 400 pF.

I just calculated (150/137)^2 ~ 1.2, i.e. you need 1.2 times more C, or 2.4 nF.
73, Stefan

Am 23.08.2018 13:34, schrieb DK7FC:
Hi Chris,

Add some C across the other Cs. If you have 2 nF currently and the frequency is at 150 kHz, then try to add 200 pF. Just try it out, forget the simulations.
73, Stefan

Am 23.08.2018 13:08, schrieb Chris Wilson:
Hello  LF'ers

Is anyone able and willing to advise on my band pass RX filter design
please? I have made a band pass filter for 137kHz reception and
checked it with my SDR in real time. It is shifted a little high and I
am wondering what I need to change to pull it a bit lower? Any
practical advice or component values welcome. Adjustability would be
nice! Thanks

Filter design is at http://www.chriswilson.tv/lf-circuit.jpg

Real world results at : http://www.chriswilson.tv/passband.jpg

ELSIE plot at : http://www.chriswilson.tv/lf-plot.jpg




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