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You almost got it right.

Ohms law, then add 30-40 percent on top to account for inefficiencies in the amplifier.

Figure 15-20A per transistor.

OR, another way to do it is before you do ohms law, take your Pout, multiply it by 1.5, then do your ohms law, and you'll have a real INPUT power rating.

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[QUOTE="Toll_Free, post: 238670, member: 1736"] You almost got it right. Ohms law, then add 30-40 percent on top to account for inefficiencies in the amplifier. Figure 15-20A per transistor. OR, another way to do it is before you do ohms law, take your Pout, multiply it by 1.5, then do your ohms law, and you'll have a real INPUT power rating. --Toll_Free --Toll_Free [/QUOTE]

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