A two-times increase in power results in a change of how many dB?

How can you decrease your transmitter's power by 3 dB?

How can you increase your transmitter's power by 6 dB?

If a signal-strength report is "10 dB over S9", what should the report be if the transmitter power is reduced from 1500 watts to 150 watts?

If a signal-strength report is "20 dB over S9", what should the report be if the transmitter power is reduced from 1500 watts to 150 watts?

The unit "decibel" is used to indicate:

The power output from a transmitter increases from 1 watt to 2 watts. This is a db increase of:

The power of a transmitter is increased from 5 watts to 50 watts by a linear amplifier. The power gain, expressed in dB, is:

You add a 9 dB gain amplifier to your 2 watt handheld. What is the power output of the combination?

The power of a transmitter is increased from 2 watts to 8 watts. This is a power gain of _______ dB.

A local amateur reports your 100W 2M simplex VHF transmission as 30 dB over S9. To reduce your signal to S9, you would reduce your power to _______ watts.