DIY KIT Projekt：
DIY-Bausatz: Enthält die Platine und die auf der Platine benötigten Bauteile, aber nicht den Netztrafo.
Um dieses Projekt fertigzustellen, sind gute Kenntnisse der Elektronik und reiche Erfahrung in Bezug auf Löten und Testen erforderlich.
Aufgrund der Zeitzone und Sprache Kommunikationsbeschränkungen, können wir nur begrenzte technische Unterstützung bieten, und Sie müssen Probleme selbst zu lösen.
Compared with the commonly reproduction of Ground Grid Pre-amplifier, we improved:
1、High Voltage：Two-stage buck regulator filter, Two low-pass filter (with a corner frequency of 1.6Hz&16Hz) prevents power noise from being introduced into the amplifier. Provide purer power supply (close to battery).
2、The high-voltage power supply uses MOSFET as pass transistors, which have a sense of tube sound characteristics but rejecting the rectification and regulation noise.
3、high-voltage soft-start feature is included which will take about 5 second to reach the designed voltage protecting the tube from any voltage shock.
4、heater-voltage soft-start feature for vacuum heater is included which will take about 5 second to reach the designed voltage(12.6v) protecting the tube from any voltage shock and extending life.
5、all-in-one design, single-point grounding, ground resistance is close to the 0.02 ohm resistance value, low noisedesign.
6、PCB is Small with double-sided smt.
7、The triangular tube layout reduces the number of dual-channel common tubes, further improves the separation and reduces crosstalk.
8、Mirror HR-pin, please shift the tube counterclockwise every three months, reduce tube magnetization, further extend tube life and save money.
9、More cost-effective sound modification plan.
