Aktuelle Folie {CURRENT_SLIDE} von {TOTAL_SLIDES}- Meistverkauft in Verstärker-Teile
Aktuelle Folie {CURRENT_SLIDE} von {TOTAL_SLIDES}- Hier sparen: Verstärker-Teile
This pre-amp has a quality pcb but suffers for basic design faults. First the 1.5k ohm grid stopper resistor is in the wrong place, it should be directly connected between the valve grid and the input,it has been put after the decoupling capacitor so not working to prevent parasitic oscillation. There is 20volts momentarily visible on the input as the decoupling cap discharges though the source. This is because as there is no volume control or any load resistor on the input, so voltage is seen through the 470k ohm grid bleed resistor connected to - 28Volts. A low resistance approx 50k ohm or lower on the input to ground is required to bring down the voltage to protect the input source. The amp will work, but sounds very strained and distorted
Bestätigter Kauf: Ja | Artikelzustand: Neu
good value
Bestätigter Kauf: Ja | Artikelzustand: Neu