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Help: TDA1541A DAC Output To Tube Gainstage
Help: TDA1541A DAC Output To Tube Gainstage
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Old 13th February 2013, 09:21 PM   #1
HP8903B is offline HP8903B
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Default Help: TDA1541A DAC Output To Tube Gainstage

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Last edited by HP8903B; 11th January 2014 at 02:10 AM.
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Old 13th February 2013, 10:05 PM   #2
DF96 is offline DF96  England
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Show us the circuit. The valve grid needs to get a DC bias from somewhere. This could be the 100k to ground, or directly from the DAC output if this provides a suitable voltage.
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Old 13th February 2013, 10:08 PM   #3
HP8903B is offline HP8903B
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The valve is cathode bias.

The DAC and the tube gainstage are in separate chassis.
The 50 ohm I/V resistor is in the DAC chassis.
The 100k ohm grid resistor is in the gainstage chassis.
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Old 13th February 2013, 11:05 PM   #4
DF96 is offline DF96  England
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Show us the circuit. Don't just describe part of it.
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