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hello and welcome back today i want to continue talking about the rf class c amplifier by designing building and testing such a circuit i will be trying to apply and measure the things discussed in the previous video on the topic so make sure to check that one out first so if youre curious then keep watching [Music] first things first what are the key specs of the circuit that i want to build well i decided to go for a power of 0.5 watts into a 50 ohm load so this should make it easy to measure using a termination resistor without breaking it the class c amplifier is narrow band so the center frequency i have chosen is 3.65 megahertz which is the middle of the 80 meter band main reason being that its quite easy to measure this frequency and it will still be relatively immune to parasitics compared to some larger frequency as supply i want to have around 10 volts and the main amplifying transistor will be the 2n2219a i had one of these lying around so i decided to put it to good use