LF Filter Components

[Sparky67]

Hi,

First question!

I am looking to build a low-pass receive-only filter to add to an active antenna, to operate below about 250kHz. Can anyone tell me if the axial resistor-type inductors are suitable for this type of application please?

Many thanks,

Martin

 

[FvM]

Sure, why not. The inductors have limited Q, but it should be sufficient for a low-pass filter.

 

[danadakk]

L sizes at LF generally a problem in creating a filter. I have seen
folks use toroids for that work when they wanted passive solution.

For LF work active filters generally preferred. I have seen
gyrator based circuits used.

VLF Reception

Homebrew VLF Receivers

www.qsl.net

GBPPR VLF Converter

www.qsl.net

An Improved Gyrator Tuned VLF Receiver | aavso

www.aavso.org

The Gyrator III VLF Receiver | aavso

www.aavso.org

Regards, Dana.