The Dynatron: A Vacuum Tube Possessing Negative Electric Resistance

A Vacuum Tube Micro-voltmeter for the Measurement of Bio-electric Phenomena *

1. Do living organisms possess steady state, or direct current, potential differences? 2. Can these potential differences be measured in such a way as to be free from the usual ambiguities of electrical measurement, i.e., can the determination of potential differences be made independently of resistance changes and current flow? 3. Do these potential differences reflect an unorganized chaos or ...

The Demon in a Vacuum Tube

In the present paper, several issues concerning the second law of thermodynamics, Maxwell’s demon and Landauer’s principle are dealt with. I argue that if the demon and the system on which it operates without dissipation of external energy are made of atoms and molecules (gas, liquid or solid) in thermal equilibrium (whose behaviour is described by a canonical distribution), then the unavoidabl...

Vacuum Tube Amplification

Designing Vacuum Tube Circuits

A vacuum tube based improved solar cooker

A new type of improved solar cooker based upon the use of a single vacuum tube is presented in this paper. The proposed cooker utilizes a solar collector consisting of parallel plane rectangular glass mirror strips mounted inside a wooden frame and requiring one dimensional solar tracking through a common driver. The proposed design can be either installed over the roof top of a house or near a...