You should be able to see them thru the top of the amp turning red.
On Saturday, January 25, 2025 at 10:05:22 AM EST, Fran?ois via groups.io <18471@...> wrote:
Hello
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I am in the process of putting a Drake L 7 amplifier back into operation.
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I was advised on this forum to bring the anodes of the 3-500Z to red to maintain the quality of the vacuum. After removing the screens to check the equipment and the filaments, I realize that once the screens are put back, there is no way to observe the anodes of the 3-500Z; everything is shielded (no window).
