LA6NCA

Audio amplifier with ECC82 tube.

 

This is my new tube audio amplifier.
I use an ECC82 for the voltage gain in the amplifier.


Here is a 2x 50 Watt stereo amplifier in a IKEA box.



Inside the amplifier. I use two of my new PCB’s here.
Mosfet’s are used in the output stage.





Here is the PCB. This is a small easy to build board.






CIRCUIT DESCRIPTION

R1 56K 1/4 W
R2 56K 1/4 W
R3 33K 1/4 W
R4 330K 1/4 W
R5 100K 1/4 W
R6 1K 1/4 W
R7 10K TRIM. POT
R8 1K 1/4 W
R9 33K 1/4 W
R10 330K 1/4 W
R11 220K 1/4 W
R12 1R 5 W
R13 10K VOL. POT
R14 1R 5 W
R15 68K 1/4 W
R16 1K 1/4 W
R17 68K 1/4 W
R18 1K 1/4 W
C1 47uF Bipolar
C2 100uF, 25V Electrolytt
C3 4.7uF  
C4 4.7uF, 400V Electrolytt
C5 4.7uF, 400V Electrolytt
C6 4.7uF, 400V Electrolytt
C7 100uF, 25V Electrolytt
C8 100uF, 25V Electrolytt
C9 100uF, 25V Electrolytt
C10 4.7uF, 400V Electrolytt
C11 220uF, 50V Electrolytt
C12 220uF, 50V Electrolytt

 

D1 12V, 0.5 W Zener Diode
D2 5.6V, 0.5W Zener Diode
D3 12V, 0.5 W Zener Diode
Q1 IRFP9240 MOSFET -200V, 12A
Q2 IRFP240 MOSFET 200V, 20A
J1 RCA PHONO CONNECTOR
J2 3p. TERMINAL 3x5 mm terminal
J3 3p. TERMINAL 3x5 mm terminal
J4 2p. TERMINAL 2x5 mm terminal
J5 2p. TERMINAL 2x5 mm terminal

NEW STEREO PCB


The picture is from GERBER files to the card.

CIRCUIT DESCRIPTION




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