Just built a linestage (actually a CF buffer), and have been trying with different 9 pin tubes.
Now it occurred to me that I could incorporate a variable resistor in the power supply to vary the B+ and also a variable resistor for the cathode.
Put in 2 meters, one to measure the current in mA and another to measure the B+.
So when I swap tubes or simply tune the current to find sweet spots, I can increase or decrease the B+ to balance with the cathode resistor.
Of course all within limits of the rectifier and tranny current.
Has anyone done this before? Don't see why it wouldn't work well.
Now it occurred to me that I could incorporate a variable resistor in the power supply to vary the B+ and also a variable resistor for the cathode.
Put in 2 meters, one to measure the current in mA and another to measure the B+.
So when I swap tubes or simply tune the current to find sweet spots, I can increase or decrease the B+ to balance with the cathode resistor.
Of course all within limits of the rectifier and tranny current.
Has anyone done this before? Don't see why it wouldn't work well.
This thread may help you a lot:
http://www.diyaudio.com/forums/showthread.php?postid=1833902#post1833902
Loading on gyrator you can forget about anode voltage adjustments. Also, you get the best possible linearity from your tube, compared to a plain resistive load.
http://www.diyaudio.com/forums/showthread.php?postid=1833902#post1833902
Loading on gyrator you can forget about anode voltage adjustments. Also, you get the best possible linearity from your tube, compared to a plain resistive load.
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