In this video, I explain how band-pass filters can reduce or eliminate QRM (interference).
Using a spectrum analyzer, I demonstrate a band-pass filter that I built based upon an article I found in the September 1988 edition of QST magazine. The article can be read here:
3 thoughts on “Band-Pass Filters for QRM”
Do you buy your kit enclosures on-line? Do you have any recommendations?
I have bought boxes from Radio Shack and also from Digi-Key. The band-pass filters were put into very solid Hammond boxes (Hammond has been making enclosures for a long time).
Recently I bought a 3D printer and I’ve made a box with that! It’s pretty cool and I’m still learning what all I can do with it.
Did you measure the insertion loss of the filter?