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Loresek KISS A/D Amplifier (Bagian 1)

3 Jun, 2022

Loresek KISS A/D Amplifier

Setelah puas dengan hasil proyek Loresek KISS (part 1, part 2, part 3, dan part 4) yang merupakan headphone amplifier portable Class-A dengan menggunakan hanya 3 transistor berdasarkan rangkaian Formula3HP oleh Lineup (diyaudio.com). Kali ini Loresek mencoba membuat versi desktopnya dengan menambahkan fitur digital/analog input dan delay turn-on pada bagian output-nya.

Skema Rangkaian Loresek KISS A/D Amplifier

Untuk skema rangkaian Loresek KISS A/D amplifier terdiri dari beberapa bagian seperti yang terlihat pada gambar berikut ini.

Skema Rangkaian Loresek KISS A/D Amplifier

Skema Rangkaian Loresek KISS A/D Amplifier (versi hi-res dapat diunduh pada download section)

DAC Section

Untuk bagian DAC, Loresek masih mengandalkan TDA1387 (single) karena dia simpel dan yang pasti suaranya enak

I/V Section

Bagian I/V, Loresek menggunakan single JFET dengan Resistor yang diparalel. Alasannya karena ya mengambil prinsip dari KISS, harus sesimpel mungkin tanpa mengurangi kualitas suara.

Delay Circuit

Untuk rangkaian delay, tidak ada yang istimewa hanya menggunakan rangkaian yang umum digunakan pada proyek audio lainnya.

Amplifier Output

Pada bagian amplifier output ditambahkan RFI dengan menggunakan combo capacitor dan ferit. Ini bertujuan untuk menyaring inteferensi dari sinyal GSM yang dikeluhkan pada Loresek KISS Class A Headphone Amplifier sebelumnya.

Desain PCB Loresek KISS A/D Amplifier

Desain PCB Loresek KISS A/D Amplifier

Desain PCB menggunakan 2 layer dengan common ground plane, untuk bagian digital agak di isolasi (dipisahkan).

Switch power dan switch input selector menggunakan pin header bertujuan agar kita mudah memilih/ menggunakan switch andalan masing-masing dan mempermudah pemasangan ketika akan menggunakan box.

Desain PCB Loresek KISS A/D Amplifier

Transistor dapat menggunakan tipe through hole atau SMD (pilih salah satu) dan untuk elco kita juga dapat menggunakan tipe SMD atau through hole.

Download Section

Bagi yang tertarik dengan proyek ini dapat mengunduh skema rangkaian Loresek KISS A/D amplifier melalui tautan di bawah ini:

Skema Rangkaian Loresek KISS A/D Amplifier

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