A Reversible Beverage On Ground (RBOG) Antenna in concept is fairly straight forward, but the details are a bit difficult to unearth.
Compared to an Elevate Beverage Antenna an BOG Beverage On Ground Antenna takes up a lot less real estate. Typical Beverage lengths for 160m are 1 to 2 wave lengths which works out to 524 to 1048 feet.
With extensive testing in actual field use, hams have found a 160m RBOG works well at 200 feet down to 160 feet. This would appear to nominally be only 3/8th wave length down to a bit less than 1/3 wave length. Some sources suggest this difference results from the ground interaction and there is the whole story of how the received waveform sort of “lays down” across a Beverage.
In practical testing hams report no increase in sensitivity and some report declining sensitivity for lengths beyond the 200 foot mark.
I’m aiming for more than 160 feet and as close to 200 feet as my location’s limits allow.
If you are are like me, the puzzling into what is inside the various parts for an RBOG setup will lead to opening things up.
Here are pictures:
The Transformer nearest to the Shack is where the particular RBOG Forward and Reverse sense are picked up: