Back Sound Jember adalah sebuah PCB power amplifier PCB nomer 307 yang konon katanya mampu menghasilkan daya hingga 300w.
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Dengan menggunakan power supply simetris 45 volt, saya tertarik untuk meneliti PCB ini karena pada pcb-nya ada tulisan “jika ingin Watt tambah hubungi PLN”.
Jika menggunakan tegangan supply 45 volt maka kemungkinan power amplifier ini menghasilkan daya hingga 180 watt pada beban 4 ohm.
Saya menduga judul 300 watt mungkin karena menggunakan dua pasang transistor final yang tiap pasang memiliki kemampuan hingga 150 watt.
Secara teori jika ingin menghasilkan daya 300 watt pada beban 4 ohm setidaknya menggunakan supply sebesar 58 volt untuk itu.
PCB ini memiliki dua buah trimpot , trimpot pertama bertugas untuk sebagai DC offset. Dan yang kedua bertugas sebagai penentu arus IDLE pada transistor final.
Yang umumnya orang-orang mengatakan transistor untuk driver tersebut biasa menyebut dengan Servo Driver.
Setidaknya anda harus memiliki sebuah trafo yang mampu mensuplai arus minimal 7 ampere untuk rangkaian ini.
Jika di bawah itu kemungkinan untuk mencapai daya di atas 180 watt akan sulit tercapai.
PCB BACK SOUND JEMBER
PCB Power Amplifier ini adalah PCB mono. Jika anda ingin memiliki dua kanal power amplifier berarti Anda harus membeli 2 buah PCB ini untuk anda isi dan anda rangkai.
Foto ini saya ambil dari dagangan MHL elektronik JEMBER:
SKEMA BACK SOUND JEMBER
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