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Questions about tubes and gear that glows. FAQ

RE: 6G5 & 6E5

The 6G5 employs a remote cutoff triode to drive the target and so takes a considerably larger voltage to close the eye compared to the 6E5 which uses a sharp cutoff triode. 6U5 was esp useful as a radio tuning indicator where the AVC voltage would be used to drive it. The remote cutoff characteristic gave the 6U5 much greater signal strength range compared to the 6E5.


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