Gunter Steinhart 6+2 box preamp.

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Francois

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Anyone got a schematic for this monster ?


The preamp modules hum like mad but works. When I pull the 220V, hum is gone and it play beautifully for 10-15s


Power supply ? Replaced the electrolytic's - no effect.  Bigger doesnt help....


Strange supply.... Used BU208 with 470Ohm 10W resistor on emitter, that already fried the PC board. Ill post my attempt at tracing it later...
 

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