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I'd like to add Grid Bias to my Hygain Amp (using LooseCannon's Schematic) to extend tube life (6JU6's currently) and clean up the signal a bit.
What Bias voltage should I aim for to enable the best result? Tube datasheet shows -55vdc maximum for Grid 1.
Is there any advantage to putting max voltage on the grid? Is a happy medium (maybe -25vdc) better for the result I hope to get?

Any and all suggestions appreciated.

73's
David

[QUOTE="Dmans, post: 623716, member: 49046"] I'd like to add Grid Bias to my Hygain Amp (using LooseCannon's Schematic) to extend tube life (6JU6's currently) and clean up the signal a bit. What Bias voltage should I aim for to enable the best result? Tube datasheet shows -55vdc maximum for Grid 1. Is there any advantage to putting max voltage on the grid? Is a happy medium (maybe -25vdc) better for the result I hope to get? Any and all suggestions appreciated. 73's David [/QUOTE]

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