Topband: HEBA antenna

[Jim Brown]

On 4/21/2024 9:00 AM, Jeff Blaine wrote:
> What I found interesting in the HEBA103 document was that it seemed the 
> FS measurements were taken at ground level along two compass points.  If 
> I'm not mistaken, the power radiated is spread out over a 3-dimensional 
> space and from that standpoint, I don't see how improved FS measurements 
> taken on the near field at ground translate directly into "high 
> efficiency."

I didn't read the document. Based on my 60+ years old experience in Pete 
Johnson's consulting office as a young EE student, I would expect the 
determination of efficiency to be based on running a couple of radials 
(that is, making FS measurements at increasing distances, and at least 
tens of miles) and comparing them with a lab prediction of FS based on 
FCC ground conductivity data. I'm pretty certain that's what FCC would 
have required to approve the license.
> 
> But on this topic, the only think I know **for certain** is that I'm a 
> mental micro-midget compared to Maxwell.

Same here.

73, Jim K9YC