FIRST CLASS FC-A4500 is a Power Amplifier say 2 x 1500 Watts and it’s so famous in Indonesian.
Inside the box, the secondary voltage of Power transformer is 64VCT, and this could be 85 to 91 Volt DC symmetrically voltage.
In that number of voltages, will be possible to make audio output up to 650 Watts at 4 Ohm load.
First Class FC-A4500 use Four pieces of Elco with value 10.000uF/100V. This is important component to DC filter.
Where is to purchase the unit? The answer is it can be your own after bought from online shop list below (price between Rp 2M to Rp.3M):
- B_M_E (CHECK PRICE)
- W_P_E (CHECK PRICE)
- D_C_E (CHECK PRICE)
- HARD ELECTRONIC (CHECK PRICE)
- ELEKTRONIK GROSIR JUPITER (CHECK PRICE)
- ALPIN ELECTRONIC (CHECK PRICE)
- JOLLY 44 (CHECK PRICE)
- YUKARI OFFICIAL (CHECK PRICE)
Also list below are online shop with price between Rp.3M to Rp.4M:
- PUSAKA LUHUR JAYA (CHECK PRICE)
- SIHAP CELL (CHECK PRICE)
- WERS_MALL (CHECK PRICE)
- HENDRA OFFICIAL 22 (CHECK PRICE)
- HADIJAYA TK (CHECK PRICE)
- GUDANG ALL SHOP (CHECK PRICE)
- WARUNG MAKAN SEBLAK (CHECK PRICE)
- TOKO KKK SUSU (CHECK PRICE)
- AHMAD STOREEID (CHECK PRICE)
- RIZKY DODOL (CHECK PRICE)
- UYA BUKU UFC (CHECK PRICE)
- CHECKOUT YUK (CHECK PRICE)
- MULYA TIKA ONLINE (CHECK PRICE)
- JOVI_ANKA (CHECK PRICE)
- ANTARA DANU (CHECK PRICE)
TRACED SCHEMATIC DIAGRAM FIRST CLASS FC-A4500
To making schematic diagram that came from this Power Amplifier kit has took about 2-3 hours to observation.
Result of power amplifier tracing is shown below:
Note: the result may be wrong.The schematic diagram is come from visual observation of youtube video I saw.
The amplifier is designed in symmetrical circuit. It can be seen at the image schematic on above.
From the schematic below, the amplifier section is consisting of some circuit blocks:
- The First is Differential preamplifier,
- Voltage Amplifier Stages,
- Servo Driver,
- Driver Amplifier, and finally is
- Final Power Amplifier.
FIRST CLASS FC-A4500 Power Amplifier is using 3 pairs of Final Transistor as 2SC5200 / 2SA1943 or 150 Watts in power dissipation (DATASHEETS).
Its mean that the Amplifier are possible to made out of 900 Watts of total Power Dissipation or about totals 750 Watts Effective power.
Other schematic Power Amplifier inside this blog THIS LINK.
Blogspot Yohan’s Blogspot consist of many DIY power and audio built up READ THIS.
Various Built-up Power Amplifier and Mixer at THIS LINK.