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OCR: 1.1 70 AS REFLECTOR FOR MAX GAIN 60 AS REFLECTOR DIRECTOR 1.0 FOR 50 FREQUEN AS MAX GAIN DIRECTOR 40 0.9 30 RDRIVE 20 0.8 10 0.. Figure 11. Effect of element spacing of two-element Yagi, both ele- ments 0.5 wavelengths long Gain increases slowly as spacing reduced, but drive resistance decreases rapidly becoming zero at very close spacing FREQUENCY RELATIVE