OSDEHA
mbrennwa
Amplifier for electrostatic headphones using directly heated triodes in the output stage
Components (50)
| Reference | Value | Description |
|---|---|---|
| Q1 | BD138 | |
| Q2 | 10M90S | |
| Q3,Q4,Q7,Q8,Q11,Q12 | LND150 | |
| Q5,Q9,Q13 | NTHL1000N170M1 | |
| Q6,Q16,Q17 | FJPF5027OTU | FJPF5027OTU |
| U1 | LM1085-ADJ | |
| U2 | NE555P | |
| C1,C2 | 470u 550 VDC | |
| C3 | 220u 630 VDC | |
| C4 | 10000u 25 V | |
| C5,C6,C9,C10 | 100n 1 kV | |
| C7,C8 | 22u 16 V | |
| C11 | 100n | |
| C12-C14 | 4.7u 630 V | |
| CHASSIS1 | MountingHole_Pad | |
| D1-D4 | SBT1845-3G | |
| D5,D7,D27-D29 | 1N4007 | |
| D6 | 1N4004 | |
| D8,D9 | 200 V | |
| D10 | 180 V | |
| D11 | GBJ3510 | |
| D12-D23 | STTH512FP | |
| D24-D26 | 10 V | |
| H1-H4 | MountingHole | |
| J1,J2 | 350 VAC / 200 mA | |
| J3 | 420 VAC / 70 mA | |
| J4 | 9 VAC / 4.5 A | |
| J5 | Stator bias | |
| J6 | HV-L | |
| J7 | HV-R | |
| J8 | HEATERS-LEFT | |
| J9 | HEATERS-RIGHT | |
| K1 | RT424006 | |
| R1,R2,R6 | 866k | |
| R3 | 1.1M | |
| R4 | 10k | |
| R5 | 47k | |
| R7 | 1.91k | |
| R8 | 470 | |
| R9 | 3.3k | |
| R10 | 2k | |
| R11 | 3k | |
| R12,R13 | 100k | |
| R14 | 4.7M | |
| R15 | 100 5 W | |
| R16,R22,R28 | 1M | |
| R17-R19,R23-R25,R29-R31,R34-R36,RV2-RV4 | 1k | |
| R20,R26,R32 | 300 | |
| R21,R27,R33 | 2 | |
| RV1 | 2M |