The table showing the amplification factor if you know the power gain in dB
|power gain dB||amplification factor|
For example if we use BLY90 which has a power gain of 5 dB at 12.5V and 175MHz this results in a total amplification factor of 3.16 times. If we want to amplify 3W with BLY90 we’ll get almost 10W at the output.
There are different types of transistor, some have a huge power gain link 2N3866 which has a 20dB power gain at 28V 100MHz which results in an 100 times amplification factor. With only 10mW 2N3866 has a 1W output power.