Re: LF: Anyone good with Elsie?

[Andy Talbot <andy.g4jnt@gmail.com>]

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 

Andy

www.g4jnt.com

On 23 August 2018 at 12:08, Chris Wilson <dead.fets@gmail.com> 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:dead.fets@gmail.com