| | Getting the Most Out of Vacuum TubesThe purpose of this book is not to add another volume to the many excellent ones available on what makes the vacuum tube work. Rather, it is intended to shed light on the almost completely neglected subject of why these versatile devices sometimes do not work.
Informed scientists and engineers have frequently stated that the life of a... | | Audel HVAC Fundamentals, Air Conditioning, Heat Pumps and Distribution Systems
The purpose of this series is to provide the layman with an introduction
to the fundamentals of installing, servicing, troubleshooting,
and repairing the various types of equipment used in residential and
light-commercial heating, ventilating, and air conditioning (HVAC)
systems. Consequently, it was written not only for the... |