This is tube Pre Amplifier with Tone Control Schematic Diagram. I separate it into 3 part:
1. The Main Circuit
Component List:
Resistor:
0.25 – 0.5 Watt 1%
R1, R2 ………………………………….100R – 330R
R3………………………………………..47K
R4………………………………………..680K – 1M
R7, R8…………………………………..39K
R9, R10…………………………………10K
R11………………………………………68K
R12………………………………………560K – 680K
R13, R14……………………………….100
2 Watt Resistor:
R5…………………………………………1K
RA…………………………………………220K
RB…………………………………………47K
RC…………………………………………3K9
RD…………………………………………680R
Potentiometer:
Vol…………………………………………2 X 100KA
BAL…………………………………………2 X 250KB, CT
BASS, MID,……………………………….2 X 250KB
TRE…………………………………………2 X 100K
Capasitor:
C1…………………………………………..22n/400V
C2…………………………………………..330n/400V
C3, C5……………………………………..100n/400V
C4, C6……………………………………..39uF/450V
C7A, C7B………………………………….8n2 – 15nF/100V
C8…………………………………………..22n/400V
C9A, C9B………………………………….1n/400V
C10A, C10B………………………………3n3/63V
C11…………………………………………1uF/250V
C12, C13………………………………….12p/250V
Semiconductor:
Va, Vb………………………………………Tube 12AT7
Transformer:
T1…………………………………………….In:220V, Out 16VAC, 1A
T2…………………………………………….In:220V, Out 275VAC 40mA
Tube Socket 9pin PCB mount 2X
2. Soft Start Filament Regulator
Component List:
Resistor 0.25 – 0.5 Watt:
R1…………………………………1K5
R2…………………………………470R
R3…………………………………51K
R4…………………………………220R
Capasitor:
C1…………………………………3300uF/50V
C2…………………………………47uF/16V
C3…………………………………470uF/16V
C4…………………………………100nF MKM
Semiconductor:
D1, D2, D3,D4…………………1N4002
TR………………………………….FCS9012
IC…………………………………..LM317T
3. High Voltage Regulator
Component List:
Resistor 0.25 – 0.5 Watt:
R1………………………………….1K
R2………………………………….470K
R3………………………………….330K
R4………………………………….20K
Capasitor:
C1, C2, C3, C4…………………39uF/450V
C5………………………………….10uF/25V
C6………………………………….220nF/250V
C7………………………………….100nF/400V
Semiconductor:
D1, D2, D3, D4…………………1N4007
D5, D6…………………………….1N4148
D7………………………………….1N4744 (15V/1W)
TR1………………………………..MJE13005
TR2………………………………..MPSA92
TR3………………………………..MPSA 42
Permisi Pak, Kalo komponen di bawah ini ada persamaanya/ekuivalent gak?
D7………………………………….1N4744
TR1………………………………..MJE13005
TR2………………………………..MPSA92
TR3………………………………..MPSA 42
Terus kalo tabung 12AT7 apa dapat diganti dengan yang 12AU7,12AX7,6201,6922
D7 adalah dioda zener 15V / 1 watt
MPSA 42 bisa diganti KSP42, MPSA 92 bisa diganti KSP 92 yang lain tidak ada gantinya.
12AT7 bisa diganti ECC81