-- ORIGINAL MESSAGE --(may be snipped) REPLY: Actually, there is something wrong with that. Glass, technically, is a liquid and flows very slowly under pressure, even at room temperature over long pe
-- ORIGINAL MESSAGE --(may be snipped) REPLY: All the currently manufactured high-end amps I am aware of use ceramic tubes (or transistors). Also food for thought. I will grant you the 3-500Z family
You are correct Bill, if you exam glass windows that are several years old you will find the bottoms thicker than the tops from the flow of the glass due to gravity. Add heat from using the tube to
Author: "Col. Paul E. Cater" <paulecater@gmail.com>
Date: Sat, 24 Jan 2015 10:06:33 -0500
You can actually see that in some of the original windows in this place. They would have been made prior to 1856. I attempted to take a picture but can not get one where you can see the flow down. In
-- ORIGINAL MESSAGE --(may be snipped) Just food for thought. REPLY: All the currently manufactured high-end amps I am aware of use ceramic tubes (or transistors). Also food for thought. I will gran
I just went out and measured a 100 year old pane of glass on my grandfather's shop. No appreciable thickness change from top to bottom. I wouldn't spend to much time watching for glass flow. Don W4DN
The "glass isn't a solid" is, apparently, a myth. For example, http://math.ucr.edu/home/baez/physics/General/Glass/glass.html wheich ends with " The use of the term "supercooled liquid" to describe g
Ceramic/metal construction is usually very vacuum tight, with exceptions due to mfr mistakes. Somewhere I have a paper from Eitel-McCoulough extolling the virtues of their new "CX" tubes back then. G
When it comes to seals, as noted, glass to metal is an art. At best, the glass is not a perfect bond to the metal. We are talking clearances that are so small, a molecule of gas may take months or ye