KT120 SE, Single Ended Verstaerker
Dieses Schaltung ist ausgelegt fuer eine KT120 Roehre, die Treiber stufe besteht aus einer
Doppeltriode, 6n6P.
Arbeitspunkt: Die KT120 Tung Sol Roehre kann einfach und genau mit der NGV eingestellt werden. Die Roehre arbeitet im reinem Klasse A Ultralinear Modus.
Klang: Souveraene, musikalische Darbietung, auch an Boxen mit welligen Impedanzgang und mittlerer Empfindlichkeit
Abhoerkette:
- Vorverstaerker Mark Levinson 380S
- CD Laufwerk Azur 851 C
- DA Wandler DAC-UP-PCM1794 MK-II
Lautsprecherkonstruktion : 3 Wege, 55 l Bassreflex mit internen Helmholtz-Absorber, separates entkoppeltes Mittel/Hochton Gehaeuse, schwimmend gelagerte Schallwand. - Lautsprecher Chassis: SEAS W221 AL, Scan Speak 15W/8531K00, Harwood AM25
- Empfindlichkeit bei 2,82V/1 m : 86dB, Impedanz 6-8 Ohm.
This circuit is designed for a KT120 tube, the driver stage consists of a strong double triode, 6n1P.
Operating point: The KT120 Tung Sol tube can be easily and accurately adjusted with the NGV .The tube operates in pure class A ultra linear mode, with the screen grid connected tap of Lundahl LL1623 output transformer.
Sound: Detailed, tight , compares to triode sound , excellent resolution and dynamic performance, runs easily on boxes from around 85dB or higer. It is possible to wire the output transformer for 4 Ohms or 8 Ohms speakers.
Equipment:
- Pre amplifier Mark Levinson 380S
- CD Cambridge Audio 851 C
- DAC Hoer-Wege UP-PCM1794 MK-II
- Loudspeaker construction: 3 Way, bassreflex with internal Helmholz absorber. Separated Mid-High cabinet, with floating baffle. Sensitivity at i 2,82V/1 m: 86dB. Impedance 6-8 Ohm.
- Lautspreaker Chassis SEAS W221 AL, Scan Speak 15W/8531K00, Harwood AM25
The KT120 power amplifier has been tested on various speakers and provides enough power for speakers from 85dB or better. This text was placed here with kind permssion of Mr. Leven.
Are you interested?
We recommend to use the transformer PCBs.
These do the same as normal wiring by hand will do, but there can be no wiring mistakes, and no wire mess.
In addition, the output impedance can be made switchable between two impedances, or can be made fixed.
Information about the Output Transformers is here
JAC MUSIC Recommended Parts list (most important parts) for one 211 mono block: |
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TRANSFORMERS |
JAC MUSIC |
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| LL1623-120mA | Lundahl (Big Core Type) | 218-111-49 |
| EE15 | Primary Board for LL9202, Gold plated. | 310-015-88 |
| EE16 | Secondary Board for LL9202, Gold plated. Can select 4 or 8 Ohms. | 310-016-48 |
| EE17 | External Switch Option for EE16. Gold plated. | 310-017-90 |
| EE18 | Secondary Board for LL9202, Gold plated. Can select 8 or 16 Ohms. | 310-018-69 |
| EE19 | External Switch Option for EE16. Gold plated. | 310-019-43 |
TUBES |
JAC MUSIC |
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| 6N6P | Russian NOS | 114-083-79
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| K150 | Sorry we have no stock | |
OTHER PARTS |
JAC MUSIC |
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| Ground Bar (Fat wire in schematic) | 1.2mm Silver wire. (you need appr. one meter for two amplifiers) | 710-023-84
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