I borrowed my cousins laptop a while back and the PSU he gave me with it wipes out everything fromlongwave right up to VHF the one I bought for use myself is almost silent so yes its a matter of whether its Chinese cheap junk or a better one where they remember to add the coils and caps on the input. Regarding flouroescent lamps my preheat make lots of clicks when they are starting but only a very slight crackle when running I have not got any idea of how much or how little rapid start make
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