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You add 6 dB whenever you double the antenna height. You will improve the receiver performance by double (i.e., a 1 microvolt receiver will perform like a 0.5 microvolt receiver). Your 100 Watt transmitter will act like a 400 watt transmitter. This does not account for cable losses which will reduce the figure a bit. The next best thing to do is getting a higher gain antenna. This is an old Motorola guideline.

[QUOTE="KC9Q, post: 466846, member: 23691"] You add 6 dB whenever you double the antenna height. You will improve the receiver performance by double (i.e., a 1 microvolt receiver will perform like a 0.5 microvolt receiver). Your 100 Watt transmitter will act like a 400 watt transmitter. This does not account for cable losses which will reduce the figure a bit. The next best thing to do is getting a higher gain antenna. This is an old Motorola guideline. [/QUOTE]

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