Good evening,
I recently came into possession of a pair of Mark Levinson 33H power amps, which are quite battered. The restoration and restoration process has almost reached its end, but it is not clear what the correct calibration values for the bias and power supply voltage of the preamplifier boards are. I am not even able to establish the settings of the oscillator board.
Does anyone have the service manual? Or do you know who to contact to get it (for a fee of course). Here in Italy it seems impossible even through the official importer.
Thanks to anyone who can help me
I recently came into possession of a pair of Mark Levinson 33H power amps, which are quite battered. The restoration and restoration process has almost reached its end, but it is not clear what the correct calibration values for the bias and power supply voltage of the preamplifier boards are. I am not even able to establish the settings of the oscillator board.
Does anyone have the service manual? Or do you know who to contact to get it (for a fee of course). Here in Italy it seems impossible even through the official importer.
Thanks to anyone who can help me
Thanks! But we need the bias value(mV) and the volt output regulator of voltage amp.
If possible... The schematic of input and voltage amplifier.
There is no circuit diagram for NO.33H, the circuit diagram for OSC-33 is different from that for NO.33H.
The circuit diagram are the same or not? The only differences are the power transistor.
For me...
For me...
We need the value in mV of bias of output current gain transistors.
Is very different as compared to 331/2/3 etc etc amplifier. The circuit diagram is the same, but different value of unreg vcc.
Is very different as compared to 331/2/3 etc etc amplifier. The circuit diagram is the same, but different value of unreg vcc.
No idea where that may be in the circuit diagram.
To what bias current would that translate ?
Hans
To what bias current would that translate ?
Hans