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In the Forum: Melquiades Amplifier
In the Thread: The Melquiades bass channels: the coupling capacitor.
Post Subject: Omitting the cap and DC Coupling Bass ampPosted by cv on: 8/13/2007
Here's an idea - uses a resistor in series with a current source on the negative supply to drop the voltage to the 6c33.
Not sure how happy (sonically) the 6C33 will be with a 50k resistor on its grid. It would be huge problem at HF and cause rolloff , not an issue with a bass amp, but it's always good to provide a low impedance path to ground for the grid in high gm valves.

If a problem, might need to insert a cathode follower buffer along with all the issues that entails...

Still, some food for thought. I'll dig up another scheme that uses a VR tube instead.

Not a mllion miles from the Newton bias....


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