Fm antenna

My first time to have a real radio with a F-connector. all other stereos they all had Spaghetti antennas and that sucks. So back to the story. I have a Sangean WR-11se radio and the stations are weak. I move the antenna around the bedroom and there was times when i can get a station in but weak or static badly. So i took the radio out to the shop. It's not a metal building just wood. The roof is a metal tin room like u see on house and buildings. Reconnecting the antenna that i got now, i located the station on the radio and moved the antenna around and could get a clear strong signal. Even on the portable CD player with a radio and it has a telescopic antenna and the same station comes in clear. So i can get the station in the shop and outdoor, but not in the room. Only electronics i have is my usual TV, Desktop, Laptop and a lap and fan. SO i looking for a good strong antenna that will bring in the signal. I can get signal but not much.

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