> up an 800 foot beverage toward the US with mixed results. On 160, the
> beverage is much better than the transmit antenna (inverted V) and is
> probably the difference between hearing and not hearing for at least a
> quarter of the QSO's. On 80, it adds no value at all over the
> transmit antennas.
What are the transmit antennas on 80m Tom?
> The surprise here was when I removed the far end terminator and the
> source impedance went sky high, which is not my experience with
> unterminated beverages. This made me question the accuracy of the
> other findings.
Did you sweep the antenna and watch impedance vs frequency? What did
you measure for impedance value, and what did you measure it with?
> My questions are part theoretical and part practical. First, is
> line of thinking valid in terms of using radials to provide low
> impedance points at the source and termination ends? Is there an even
> better idea?
Yes, use more radials or better yet make a small "screen" of wires.
> of wire)? Do the radials pickup signals from unwanted directions if
> they are above ground?
Yes they do, even if they are below ground if there aren't opposing
wires or extensive good ground under them.
Is there a preferred orientation to the
> radials? Should I use any ground stake at all on either end?
It can only help, I'd use one.73, Tom W8JI