Tube Amp 200W EL34 H bridge Output circuit

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STD Tube Amp 200W EL34 H bridge Output circuit

License: CERN Open Hardware License

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Update time： 2022-03-17 17:17:19

Creation time： 2020-04-03 16:38:43

Description

# 200 W mono tube amplifire # Exemple power tube-amplifire based on EL34 power tubes in H bridge configuration. Modular design to be able to use it as Guitar amplifire or as WifFi amplifire simply by changing some components and using an other pre-amp stage. Using régulated 12.6 V (+/- 6.3 V) Filament power supply for nise enhansment. Power rating is an estimate. Usualy 8 EL34 lamps are capable of a bit more.

Design Drawing

schematic diagram

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Power stage
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BOM

BOM download Purchase Parts

ID	Name	Designator	Footprint	Quantity
1	10u	C1,C2	CAP-D22-VS	2
2	1ku	C3	CAP-D8.0XF1.5	1
3	10µF	C6,C7,C8,C9	CAP-TH_L13.0-W6.0-P10.00-D1.0	4
4	600V	J1	CONN-TH_12XX	1
5	560V	J2	CONN-TH_12XX	1
6	0V	J4	CONN-TH_12XX	1
7	+12.6V	J3	CONN-TH_12XX	1
8	GND	J5	CONN-TH_12XX	1
9	Tr1.1+	J6	CONN-TH_12XX	1
10	Tr1.1-	J7	CONN-TH_12XX	1
11	0VV	J8	CONN-TH_12XX	1
12	+12.6VV	J9	CONN-TH_12XX	1
13	100	R1,R2,R3,R4,R5,R6,R7,R8	R_AXIAL_POWER_L20.0MM_W6.4MM_P30.48MM	8
14	1k	R9,R10,R11,R12,R13,R14,R15,R16	AXIAL-0.3	8
15	500	R17	R_AXIAL_POWER_L25.0MM_W9.0MM_P27.94MM	1
16	2k	R18,R19,R20,R21,R22,R23,R24,R25	R_AXIAL_DIN0614_L14.3MM_D5.7MM_P25.40MM_HORIZONTAL	8
17	100k	R26,R27,R28,R29	AXIAL-0.3	4
18	100	R30,R31,R32,R33,R34,R35,R36,R37	AXIAL-0.3	8
19	RCA-V	CON1,CON2	RCA_V	2
20	1µF	C4,C5	CAP-TH_L13.0-W4.0-P10.00-D1.0	2
21	ECC81	U9,U10,U11,U12	12AX7_SOCKET_B9A	4
22	EL34	U1,U2,U8,U7,U3,U4,U6,U5	VALVE-OCTAL	8