Home Projects Audio Stereo Tube Amplifier

 
 

Stereo Tube Amplifier
source: http://www.aaroncake.net/


 

 

By Weslee Kinsler

The circuit is simple, yet is capable of excellent performance. I designed it specifically for use as an amplifier for the digital sound card in my computer. Audio input can be from any two-channel line level device such as a television, CD player, or VCR. It is of the tube type, using only 5 tubes total with no more than about 45 Watts power consumption from the outlet. It uses 3 types of tube 1 5Y3 GT vacuum rectifier, 2 6SF5 GT high-mu triodes, and 2 6K6 power beam amplifiers. These are all full-size octal type tubes which are commonly available today for between $3-5 each.

Schematic


Schematic for tube amp

 

 

Parts:

Part

Total Qty.

Description

Substitutions

R1, R10, R13

6

2.2Meg Pot

R2

2

470K 1/2W Resistor

R3

2

1 Meg 1/2W Resistor

R4

2

220K 1/2W Resistor

R5

2

330 Ohm 2W Resistor

R6

2

220K 1/2W Resistor

R7

2

2.2Meg 1/2W Resistor

R8

2

1Meg 1/2W Resistor

R9

1

720 Ohm 20W Resistor

R11

2

33K 1/2W Resistor

R12

2

22K 1/2W Resistor

C1, C9

4

0.005uF 400V Capacitor

C2

2

0.05uF 600V Capacitor

C3

2

20uF 25V Electrolytic Capacitor

C4

2

0.01uF 400V Capacitor

C5

2

200uuF 400V Ceramic Disc Capacitor

C6, C7

2

15uF 450V Capacitor

C8

2

15uF 400V Capacitor

T1

1

117V Primary, 350VCT Secondary, 6.3V Secondary, 6.3V Secondary

T2

2

7600 Ohm Primary, 4 or 8 Ohm Secondary

SW1

1

SPST Switch

SP1, SP2

2

12" or smaller, 4 or 8 ohm speakers

MISC

1

5 tube sockets, 2 RCA jacks, PC board or chassis, wire, knobs, etc.

Notes:

1. Email Weslee Kinsler with questions, comments, etc.

2. The 6V6 GT tube may be substituted for the 6K6 to lower power requirements.

3. C8 is for radio interference suppression and may be omitted.

4. The 5Y3 GT tube should be mounted in a vertical position and be well ventilated. The 6K6 and 6SF5 tubes can be mounted in any position.

5. Controls should have an audio taper.

6. The power supply portion of this unit may be used for anything requiring 290-320v DC up to about 3 amps.

 

 
 

 

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