Description

This is a 30 MHz four section elliptic low-pass filter, combined with a two-section shelf filter, and followed by a medium-gain preamplifier. The low-pass filter serves as an anti-aliasing filter for a SDR, especially one that is clocked at 66 MHz or so. The shelf filters will provide moderate attenuation at the lower frequencies, where powerful signals can cause overload. The amplifier provides enough gain to compensate for the filter loss, and boost the signal presented to the receiver.

For more details, see the Filter-Preamp User’s Guide.

If you are outside the USA, please consider ordering two of these!  International shipping costs are much higher than my domestic rates, and so far I’m not charging extra for this.  I can ship two of these for the same rate as one.  Thank you!