Topband: Monopole Radiation Patterns, takeoff angles etc

[ZR]

Thats not exactly what I meant, I was simply stating that "ground wave" on both bands is excellent. When I was a lot younger those bands were very popular with commuters on AM.

Radiation at zero degrees wont bounce off anything, it will eventually be all absorbed by ground losses. Its also doubtful that radiation at 5* will do much better unless its all over salt water.

Carl
KM1H


  ----- Original Message ----- 
  From: Mike Waters 
  To: topband 
  Cc: ZR 
  Sent: Monday, May 07, 2012 10:22 PM
  Subject: Re: Topband: Monopole Radiation Patterns, takeoff angles etc


  I've never operated mobile, but it sounds like you're saying the daytime local range on 160 and 10 is comparable.

  But Rich is also talking about the radiation at zero degrees bouncing off the ionosphere and returning to the earth at some distant point. That's what I'm wondering about. Local is one thing, but DX is another.

  73, Mike


  On Mon, May 7, 2012 at 9:04 PM, ZR <zr at jeremy.mv.com> wrote:

    Try operating 160 and 10M mobile, you would be surprised at the daytime range even with low power into a 8' antenna on 160.



      I'm pretty sure this surface wave at ~0 degrees elevation is useful on (and below) the AM broadcast band (especially the lower portion) and 160 meters.

      But what about at 3.5, 5, 7, 10, 14, 18, 21, 24, and 28 MHz? That's what I've been trying to figure out: exactly how useful is this radiation at zero degrees on the different ham bands?

      Based on my experiences --and what I've studied-- since 1976, I'm not sure that it is.

      73, Mike


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