211 Triode Amplifier, Single Ended
Roehren: 12AU7, EH 6V6GT , 211 Shuguang
Der Arbeitspunkt: jede 211 Roehre kann einfach und genau mit der NGV eingestellt werden. Die Roehre arbeitet im reinem Klasse A Modus .
Treiber: 6V6GT ist als Triode geschaltet und choke loaded
Klang: sehr ausgewogen, loest feinste Klangdetails auf, laeuft an Boxen mit mittlerer Empfindlichkeit aber auch durch den geringen hum and noise an wirkungsgradstarken Boxen
Abhoerkette : ML 380S, CD Cambridge Audio 851 C, DAC-UP-PCM1794 MK-II
Lautsprecher Box1: 3 Wege, 65 l BR mit internen Helmholtz-Absorber, separates entkoppeltes Mittel/Hochton Gehaeuse, schwimmend gelagerte Schallwand .
Chassis : SEAS CA26RE4X, Accuton C158-8-085, ScanSpeak D3004/662000,
Empfindlichkeit bei 2,82V/1 m : 89dB, Impedanz 6-8 Ohm.
Lautsprecher Box 2: 86 dB , siehe KT120 AGILE
This circuit is designed for a 211 tube, the driver stage consists of a strong tube, 6V6GT as triode connected with choke loaded.The operating point of any 211 tube can be easily and accurately adjusted with the NGV .The tube operates in pure class A mode .
Sound : very detailed, trioden sound , excellent resolution and dynamic performance, runs on boxes from around 86dB or higer.
It is possible to wire the Lundahl output transformer for 4 Ohms or 8 Ohms speakers using the LL9202. For 8 Ohm Speakers, with the Lundahl output transformer LL1691,
the 211 SE power amplifier has been tested on various speakers.
Are you interested?
211 Schaltung mit freundlicher Genehmigung von Dipl. Ing. J. Leven.
211 Circuit placed here with kind permission of Dipl. Ing. J. Leven.
JAC MUSIC Recommended Parts list (most important parts) for one 211 mono block: |
||
JAC MUSIC |
||
| TRANSFORMERS | ||
| LL1691-70mA | Lundahl (Big Core Type) | 218-186-87 |
| LL9202-85mA | Lundahl | 218-118-39 |
| LL1667 (DC current not final yet) | Lundahl | |
| LL1673-15H | Lundahl | 218-009-64 |
| TUBES | ||
| ECC82, or 6189W | Sylvania NOS | 114-020-87 |
| 6V6, smoked Glass | Reflektor, Russian NOS | 114-068-89 |
| 211 | NOS, we recommend 211/VT4C by General Electric. | 114-169-39 |
| OTHER PARTS | ||
| MCap Supreme Silver Oil 0.33uF (for 211) | Mundorf Germany | 323-065-27 |
| MCap Supreme 0.22uF (for ECC82) | Mundorf Germany | 323-035-67 |
| MCap 0.22uF (for heater of 211) | Mundorf Germany | 323-003-19 |
| RCA input connector by Yamamoto | Yamamoto, nickel free contacts |
320-050-29 |
| Yamamoto Speaker Terminals | Solid Copper | 320-048-87 |
| Furutech Mains Inlet | Gold plated |
319-008-93 |
| Ground Bar (Fat wire in schematic) | 1.2mm Silver wire. (you need appr. one meter for two amplifiers) | 710-023-84 |
| Tube Socket Noval for ECC82 (6189W) | Yamamoto Gold | 20-038-76 |
| Tube Socket Octal 6V6 | Yamamoto Gold | 320-035-17 |
| Tube Socket JUMBO for 211 | Yamamoto Gold | 320-022-96 |
100mA Meter |
Yamamoto | 320-059-18 |
| Meter Bezel (optional, to make it look like a metal meter) | Yamamoto | 320-061-62 |