The Ultimate Glossary of Terms About beli view YouTube
http://zanderrmuq191.theglensecret.com/how-did-we-get-here-the-history-of-menambah-subscriber-youtube-told-through-tweets
Even cables with built-in repeaters usually permit for an exterior power supply for being hooked up. This is just a bit additional safety for the signal and will be a good suggestion depending upon the situation