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低噪音的管子真的那麽难找吗?国内的我不清楚,国外很多网站有卖,但价钱可能相对贵一点。
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反正我经过修理350 rx amp那次就觉得是这样
bf981做的
bfp196p的
bfg135a的
bf998的
这个我认为最强
atf54143的
144mhz: nf=0.4db, gain=26db (measured by yu1aw)
144mhz: nf=0.37db, gain=20.8db (measured by ok1uow)
432mhz: nf=0.38db, gain 22db, p1db=18dbm (measured by s53ww)
432mhz: nf=0.4db, gain 19db (measured by yu1aw)
1296mhz: nf=0.4db, gain=17.7db (measured by s53ww)
1296mhz: nf=0.4db, gain=17.5db (measured by yu1aw)