OSDEHA
mbrennwa
Amplifier for electrostatic headphones using directly heated triodes in the output stage
Components (36)
| Reference | Value | Description |
|---|---|---|
| Q1,Q2,Q5,Q7,Q9,Q10 | DN2540 | |
| Q3,Q4 | STF3LN80K5 | |
| Q6,Q8 | IXTP3N100D2 | |
| U1,U2 | 6E5P | |
| U3 | DHT1 | single triode |
| U4 | DHT2 | single triode |
| C1,C4-C9 | 220n 630 V | |
| C2,C3 | 470n 1 kV | |
| D1-D4,D9-D12 | 15V | |
| D5 | 43V | |
| H1-H4 | MountingHole | |
| J1 | INPUT | |
| J2 | HEATERS DC | |
| J3 | PSU HV | |
| J4 | OUTPUT | |
| J5 | DHT FIL | Generic connector, single row, 01x03, script generated |
| R1,R3 | 499k | |
| R2,R5,R7,R8,R21,R22,R34,R40,R41,R43 | 1k | |
| R4,R9 | 25k 5W non-inductive | |
| R6 | 50...200 | Adjust value for CCS current |
| R10 | 12k 7W | |
| R11,R16 | 1M | |
| R12 | 10k 1W | |
| R13,R18 | 100k | |
| R14,R19 | 20k | |
| R15,R20 | 18.7k | |
| R23,R24 | 220 | |
| R25 | 4.3k 3W | |
| R26 | 4.3k 3W | |
| R27,R28 | 1k 0.33 W fus. | |
| R29-R31,R35-R37 | 270k | |
| R32,R38 | 330 | |
| R33,R39 | 470 3W | |
| R42,R44 | 100...400 | Adjust value for CCS current |
| SW1 | SW_DPDT_x2 | |
| TP1,TP2 | MU-TP | Keystone test point |