Some Experiments on the Amplification of Thermocouple Electromotive Forces
- 1 September 1938
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 9 (9) , 267-269
- https://doi.org/10.1063/1.1752550
Abstract
Experiments employing a new type of regenerative direct‐current amplifier have shown that such equipment is unsuited for use, except, perhaps, in the laboratory. A successful system of amplification employing vacuum tube amplifiers and commutators for inverting and synchronously rectifying the resulting amplified alternating potentials is described. Thermocouple electromotive forces less than 10−9 volt are readily indicated on a portable microammeter. The over‐all useful amplification with portable equipment exceeds 50,000.This publication has 1 reference indexed in Scilit:
- Principles of a New Portable ElectrometerPhysical Review B, 1932