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1. [Amps] Vacuum variable hipotting (score: 1): Author: "John Lyles" <jtml@losalamos.com>; Date: Fri, 18 Sep 2009 15:39:45 -0600; Yes, you aren't really cooking the vacuum, you are 'spark knocking' the device. By applying controlled HV, the pesky whiskers that tend to cause sparkovers inside the device will be emitting electron; /archives//html/Amps/2009-09/msg00244.html (8,191 bytes)
2. Re: [Amps] Vacuum variable hipotting (score: 1): Author: TexasRF@aol.com; Date: Fri, 18 Sep 2009 18:31:31 EDT; John, perhaps you can shed some light on how bad can a vacuum leak be before the tube is unusable. I have seen some used tubes that begin to show current with as little as 1600 volts between the anod; /archives//html/Amps/2009-09/msg00245.html (8,831 bytes)

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