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1. [Amps] Tube gain vs frequency (score: 1): Author: Stirling Schmidt <kc0nxm@sbcglobal.net>; Date: Wed, 26 Aug 2009 19:20:37 -0700 (PDT); Hi all: I'll try to keep this short, but have several questions. First, what is/are the factor(s) that determine a tube's upper frequency response? I tried thinking (uh-oh!) but only deduced th; /archives//html/Amps/2009-08/msg00531.html (7,864 bytes)
2. Re: [Amps] Tube gain vs frequency (score: 1): Author: jeff millar <jeff@wa1hco.net>; Date: Wed, 26 Aug 2009 22:44:59 -0400; Plate output capacitance doesn't matter too much because it gets absorbed into the plate output network. The biggest consequence becomes the high Q and high circulating currents that naturally occurs; /archives//html/Amps/2009-08/msg00534.html (9,146 bytes)
3. Re: [Amps] Tube gain vs frequency (score: 1): Author: TexasRF@aol.com; Date: Wed, 26 Aug 2009 23:56:33 EDT; Regarding current flow from the anode to the top cap connection: RF will flow on the surface of conductors. All of the rf then has to pass through the ceramic to metal seal. The amount of rf flowing; /archives//html/Amps/2009-08/msg00535.html (11,571 bytes)
4. Re: [Amps] Tube gain vs frequency (score: 1): Author: "Alex Eban" <alexeban@gmail.com>; Date: Thu, 27 Aug 2009 15:42:33 +0300; The first question requires the longest answer: The foremost frequency wise limiting factor is the transit time: the time it takes for the electrons to travel from the cathode to the anode ( a few na; /archives//html/Amps/2009-08/msg00539.html (10,185 bytes)
5. Re: [Amps] Tube gain vs frequency (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Thu, 27 Aug 2009 12:19:55 -0400; What 1296 tube is that Gerald? Carl KM1H _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2009-08/msg00547.html (13,904 bytes)
6. [Amps] Tube gain vs frequency (score: 1): Author: "John Lyles" <jtml@losalamos.com>; Date: Thu, 27 Aug 2009 11:14:06 -0600; Alex and Gerald pretty much gave you replies that explained this. Here is more 'free' information. Usually the output circuit is the most difficult to design as you push tubes in Power x Freq. Output; /archives//html/Amps/2009-08/msg00551.html (12,837 bytes)
7. Re: [Amps] Tube gain vs frequency (score: 1): Author: "Bill, W6WRT" <dezrat1242@yahoo.com>; Date: Thu, 27 Aug 2009 12:50:44 -0700; This discussion would not be complete without mention of tubes which actually take advantage of the transit time effect - TWT's (Traveling Wave Tubes) and Klystrons. There may be others too. I haven'; /archives//html/Amps/2009-08/msg00552.html (7,747 bytes)
8. Re: [Amps] Tube gain vs frequency (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Thu, 27 Aug 2009 17:37:12 -0400; Add to the list the Klystrode (r) or Inductive Output Tube (IOT) and the Diacrode. There may be other devices that combine multiple technologies - like the multi stage depressed collector IOT (MSDC; /archives//html/Amps/2009-08/msg00556.html (9,364 bytes)

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