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Re: LF: Anyone good with Elsie?

from [Andy Talbot] [Permanent Link][Original]
To: LineOne <[email protected]>
Subject: Re: LF: Anyone good with Elsie?
From: Andy Talbot <[email protected]>
Date: Thu, 23 Aug 2018 13:31:12 +0100
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The caps are likely to be close to their proper value ], which leaves the values of the inductors.
You have E12 preferred values so guess you're using ready made L components.

They may be specified at a different frequency, a different mounting etc. all of which affect their value.   If you can't adjust the inductance, frig the caps, as Stefan suggested.

I checked the design using ADDE - got the same frequency response plot 


On 23 August 2018 at 12:08, Chris Wilson <[email protected]> wrote:


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
--
Best regards,
 Chris                          mailto:[email protected]



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