Instruction/ maintenance manual of the product Soundpleasure Bellini preamplifier Audio Analogue
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A U D I O F U T U R A A U D I O F U T U R A A U D I O F U T U R A A U D I O F U T U R A s.r.l. Bellini prea m plifier – Virtual Battery off line po w er supp ly 1 / 5 Issue Date: June 2 008 AUDIO FUTURA s.r.l. Research & Development E-Mail (su pport): sblanda@audioanalo gue.
A U D I O F U T U R A A U D I O F U T U R A A U D I O F U T U R A A U D I O F U T U R A s.r.l. Bellini prea m plifier – Virtual Battery off line po w er supp ly 2 / 5 Introduction To achieve t he be.
A U D I O F U T U R A A U D I O F U T U R A A U D I O F U T U R A A U D I O F U T U R A s.r.l. Bellini prea m plifier – Virtual Battery off line po w er supp ly 3 / 5 Virtual battery The target i s to not have power suppl y interferences at all. The first step is to cl ean out the AC li ne, and t hi s is what is done with an “AC filt er”.
A U D I O F U T U R A A U D I O F U T U R A A U D I O F U T U R A A U D I O F U T U R A s.r.l. Bellini prea m plifier – Virtual Battery off line po w er supp ly 4 / 5 Of co urse the story goes on cycle by cycle setting the appropriate vol tage at the in put of Voltage r egulators 3 and 4.
A U D I O F U T U R A A U D I O F U T U R A A U D I O F U T U R A A U D I O F U T U R A s.r.l. Bellini prea m plifier – Virtual Battery off line po w er supp ly 5 / 5 FFT Spectrum A nalysis at Vol ume maximum As you can see in the graphics the 50Hz component hav e bee n reduced to - 12 0dB.
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