What coponent does SMD marking 2290 indicate. Casing is SOT89-3
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SMD marking 2290?
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Re: SMD marking 2290?
Hi, got help on EEVblog forum with this one. Despite missing markingnumber in the datasheet i think it is a MAAM-009100, RF amplifier, https://cdn.badcaps-static.com/pdfs/...050b273604.pdf
It is 6 of them in a adjustable RF amplifier, originaly made by MACAB, a swedish company, but sold by a norwegian company as ELKO. It is very special solution(imo), used to amplify RF signal onto ethernetnetwork, using one of the pair, and a "balun" at each outlet, for connection to the TV. Since the PSU to this unit was dead, I suspected more damage on the amplifier, because a lot of noise on the outputs, when a new psu was connected. That can possibly be a matter of adjusting, we shall see. Since these units are not sold anymore, it has some value for the user to get it up and go again.
Regards
D.A.
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