Topband: Short monopoles

[Tom Rauch]

>            I need information (pref. www links or other sources)
>            describing
> short monopoles using multiple wires connected to it's top and fed in
> phase for increase in radiation resistance. (Used in LF/VLF).
> 
> Get yourself a copy of the RSGB booklet :
> Practical Wire Antennas
> It is excellent

The VLF antennas with multiple tuned drops never worked as claimed, 
and gradually were abandoned over time for more simple setups that 
produced higher efficiency. One example in the NE USA even made 
engineering textbooks when the system had significant FS increase 
when they went from multiple drops to a single normal top-loaded 
vertical. 

Coaxial Inverted L's, multiple drops, and other fancy gimmicks do not 
lower noise or increase efficiency over a single wire the same 
dimensions. It is all in the minds of the beholders.  

Ian, G3SEK, informed everyone in a similar discussion some time ago 
the RSGB has corrected their Handbook regarding radiation resistance 
of short monopoles. The RSGB Handbook no longer makes the incorrect 
statement that adding drop wires increases radiation resistance and 
ground system efficiency.

I'm not familiar with the booklet Practical Wire Antennas. Like our 
Antenna Compendium, it might be technically unedited or lack 
technical peer review processes. The problem is always sorting the 
good information from bad information in non-peer reviewed technical 
publications.73, Tom W8JI
W8JI@contesting.com