Welcome to the FlexRadio Community! Please review the new Community Rules and other important new Community information on the Message Board.
Need the latest SmartSDR or 4O3A Genius Product Software?

SmartSDR v3.10.10 and the SmartSDR v3.10.10 Release Notes
SmartSDR v2.12.1 and the SmartSDR v2.12.1 Release Notes

The latest 4O3A Genius Product Software and Firmware
If you are having a problem, please refer to the product documentation or check the Help Center for known solutions.
Need technical support from FlexRadio? It's as simple as Creating a HelpDesk ticket.

AM Broadcast Interference on my Flex 6400

W7HUT
W7HUT Member ✭
in FLEX-6000 Signature Series
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 2021

    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

Leave a Comment

Rich Text Editor. To edit a paragraph's style, hit tab to get to the paragraph menu. From there you will be able to pick one style. Nothing defaults to paragraph. An inline formatting menu will show up when you select text. Hit tab to get into that menu. Some elements, such as rich link embeds, images, loading indicators, and error messages may get inserted into the editor. You may navigate to these using the arrow keys inside of the editor and delete them with the delete or backspace key.

Comment As ...

Categories