That might not be a fair comparison, since the pattern might be quite
different with and without the resistors. To determine what fraction of
the applied power is dissipated in the resistors, simply click the Load
Dat button.

Roy Lewallen, W7EL

Cecil Moore wrote:
J. McLaughlin wrote:

After investigating a large set of traveling wave antennas (not
Beverage) I think that the smallest amount of power dissipated in the
terminating resistance was about 2 db.


Just modeled the subject antenna as well as I can. Without the
termination resistors, the antenna has a gain of +6 dBi on 3.8
MHz. With the termination resistors, according to EZNEC, the
gain drops to -10 dBi, a difference of 16 dB.
--
73, Cecil http://www.qsl.net/w5dxp

Roy Lewallen wrote:
That might not be a fair comparison, since the pattern might be quite
different with and without the resistors. To determine what fraction of
the applied power is dissipated in the resistors, simply click the Load
Dat button.

Well, the shape of the pattern looks the same. The Load Dat function
produces 3015 watts into the antenna (high feedpoint impedance) and
1399 watts dissipated in each resistor. That's 217 watts not dissipated
in the resistors out of 3015 watts into the antenna for an efficiency
of about 7.2%, in the neighborhood of a mobile antenna on 75m.
--
73, Cecil http://www.qsl.net/w5dxp