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The radiation resistance of a 3 meter antenna at the upper end of the band is about 0.1 ohm. At the low end it is about 0.01 ohm (10 times less). Higher radiation resistance is better. This is a measure of how well an antenna radiates relative to ground loss resistance. These antennas are severely crippled at both ends of the band, but at the high end, the antenna is slightly less crippled. A quarter wave vertical by comparison has an RR of about 50 ohms.
As an aside, the very low radiation resistance of these antennas is why a very good ground is so important. The radiation resistance is in series with the ground loss resistance. If you have 10 ohms of ground loss resistance (pretty good), at the high end of the band, your signal will go mostly to ground and the ratio of lost signal to radiated signal will be 10 ohms/0.1 ohm = 100:1. If you could sweat out achieving a 0.1 ohm ground loss resistance, the ratio would be 1:1. Even then half of your signal would be lost and the other half radiated, but you would be 100 times better off than with a 10 ohm ground.
With a full quarter wave vertical and 0.1 ohm ground loss, your ratio of lost signal to radiated signal would be 0.1 ohm/50 ohms = 1:500! Essentially all the signal is radiated.
The FCC obviuosly had low radiation resistance in mind when they wrote the 3 meter rule. They may not have expected that innovative users would install very elaborate ground systems to overcome the crippled 3 meter antenna.