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AM Broadcast Interference on my Flex 6400

We have several 50KW AM stations within a 10 mile radius of my QTH strong enough to occasionally lift the entire spectrum in sync with music or a voice. Are there recommended externbal passband filters to cut off everything below 1.8MHz?

Best Answer

Answers

  • W7HUT
    W7HUT Member
    Thanks Len - since asking, I did a search and found one from Morgan KF7P and another from DX Engineering - both rated for 200W - may give one a try or whip one up myself - the 6400 is amazing sensitive (no complaints there)!
  • Mark Aaker K6UFO
    Mark Aaker K6UFO Member ✭✭

    Broadcast Band Filters good for over 100 watts at

    https://www.kf7p.com/KF7P/Morgan_Filters.html

    or

    https://www.dxengineering.com/parts/dlw-fl1718


    I've used both at various times to cut down AM Broadcast interference.

    Mark K6UFO

  • W7HUT
    W7HUT Member
    Thanks Mark

    Leaning towards the Morgan

    Michael
    W7HUT
  • W7HUT
    W7HUT Member
    Thanks Mark

    Leaning towards the Morgan

    Michael
    W7HUT
  • Steve KD2OM
    Steve KD2OM Member ✭✭
    edited March 20

    The company I worked for has used the DX engineering brick wall filter (when it was hand built by the designer) for installations of military radios that were suffering from proximity to an AM station. It was a 150 watt radio and mostly used for digital comms. The filter worked very well.

    You also might look into notching the worst offender. A series cap and inductor to ground works.

    73

    Steve KD2OM

  • W7HUT
    W7HUT Member
    Thanks Steve - Have the Morgan on order, we'll see how it works...

    Michael W7HUT

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