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Audio Analogue BELLINI - качественный предварительный усилитель с отличной звуковой характеристикой. Владельцы этого продукта могут с удовольствием изучать его функции и настройки, загружая бесплатное Руководство по эксплуатации с manualshive.com. Погрузитесь в мир звуковой электроники с Audio Analogue BELLINI.

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AUDIO FUTURA

AUDIO FUTURA

AUDIO FUTURA

AUDIO FUTURA

spa

Bellini preamplifier – Virtual Battery off line power supply

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Issue Date: June 2008

AUDIO FUTURA

spa

Research & Development

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Bellini preamplifier

Virtual Battery off line power supply

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Содержание BELLINI

Страница 1: ...r Virtual Battery off line power supply 1 5 Issue Date June 2008 AUDIO FUTURA spa Research Development E Mail support sblanda audioanalogue com podesta audioanalogue com saggini audioanlogue com elia audioanalogue com Bellini preamplifier Virtual Battery off line power supply ...

Страница 2: ...d at what frequencies are generated Often the main interferences in an audio equipment are driven in by the main power supply that introduces interferences at both low and high frequencies In fact the AC power supply is a fundamental 50Hz 60Hz signal with a lot of high frequencies components Nowadays the high frequency part may be very high due to the increasing number of electronic products using...

Страница 3: ...e these solutions are present with better or worse results in every good audio equipment the virtual battery comes beyond What we want to do is to never connect in any way the preamplifier supply stage that supplies the preamplifiers stage the input selection circuit and the volume circuit to the 50Hz 60Hz area This is implemented supplying the Voltage regulators 3 and 4 by a capacitor bank of 156...

Страница 4: ...g 1 Schematic The virtual battery works supplying all the preamplifiers circuits separately from the 50Hz 60Hz area eliminating in such way the 50Hz 60Hz interference The high frequency interferences are stopped by the AC filter and also reduced by the virtual battery In the measurements beyond we can see the noise spectrum measured at the RCA output of the Bellini Virtual Battery Preamplifier wit...

Страница 5: ...y off line power supply 5 5 FFT Spectrum Analysis at Volume maximum How you can see in the graphics the 50Hz component and the 50Hz harmonics have been reduced to 120dB probably that value is due much more to the environment influence on the cables used a standard one then to the preamplifier ...

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