[Towertalk] Beverage Radials

[Tom Rauch]

> Has anyone any views on whether a small radial system for a beverage,
> instead of ground rods when placed near the Tx antenna radial system,
> but 200ft away from the Tx antenna would receive extra induced noise
> from the Tx system on a beverage. I was thinking of laying a few
> radials for a beverage over the outer limits of the Tx radial system.
> Clive GM3POI

I either use multiple ground rods spaced several feet apart or a 
single rod and at least two radials on my beverages.

I've found that when it gets really dry, the ground resistance of a 
single ground is far too high. Even with moist soil, the RF 
resistance of a six foot deep one inch diameter copper pipe is almost 
100 ohms.

Be sure you isolate the coax shield from the Beverage ground at the 
feedpoint, to prevent the coax shield from acting like a long antenna 
that drives the ground system with unwanted RF. I totally isolate the 
primary of all my beverage transformers from the secondary, and do 
not ground the shield near the antenna ground system.

  
73, Tom W8JI
W8JI@contesting.com