Stumbled on this thing:
http://www.single-ended.com/F5002-300B-Perque-drive.htm
does anyone know anything about it or tried it out? Seems rare. There is another version that uses a mosfet for the pentode grid bias.
Seems like a way to reduce output impedance of the driver stage while keeping cathode bias.
I am trying to understand the circuit and see if there are any advantages vs going to fixed bias.
best
http://www.single-ended.com/F5002-300B-Perque-drive.htm
does anyone know anything about it or tried it out? Seems rare. There is another version that uses a mosfet for the pentode grid bias.
Seems like a way to reduce output impedance of the driver stage while keeping cathode bias.
I am trying to understand the circuit and see if there are any advantages vs going to fixed bias.
best
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