- 1. Re: [Amps] AC or DC better for indirectly heated cathodes? (score: 1)
- Author: "Tom McDermott" <tom.mcdermott4@verizon.net>
- Date: Thu, 20 Nov 2003 08:23:46 -0600
- Adam: With incandescent bulbs, the lifetime of the bulb is severely degraded when it is operated off DC due to what is called the 'notching' effect. This effect is essentially the erosion of the fila
- /archives//html/Amps/2003-11/msg00296.html (8,349 bytes)
- 2. Re: [Amps] tube cooling (score: 1)
- Author: "Tom McDermott" <tom.mcdermott4@verizon.net>
- Date: Sun, 15 Feb 2004 08:49:34 -0600
- A basic problem is that most types of fans move a greater volume of air when working against a backpressure than they do when working against a backvacuum. When working against a significant backpres
- /archives//html/Amps/2004-02/msg00117.html (8,156 bytes)
- 3. Re: [Amps] Alpha-76pa Question (score: 1)
- Author: "Tom McDermott" <tom.mcdermott4@verizon.net>
- Date: Fri, 4 Jun 2004 07:56:41 -0500
- A couple of items: 1. Older versions of the 76-PA took 100 watts drive (was part of the FCC rules at the time). Later versions have the low-drive modification to reduce the drive requirement to about
- /archives//html/Amps/2004-06/msg00016.html (7,991 bytes)
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