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Pulsating output tubes, one side

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  • Pulsating output tubes, one side

    Got a Marshall-style output section. Getting the pulse-glow on peaks. So I swapped from KT66 to KT77 and it does the same brightening but on the other side!

    I didn't bother with a bias adjustment just yet, its a wee bit late. Got individual 100Ω on the screens.
    The standby LED rises in brightness in sync with the the output tube. See schem.

    Any ideas?
    Attached Files
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