Types of Vacuum Tubes
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Testing Guitar Amplifier Vacuum Tubes with a Computer Controlled Data Acquisition System
While vacuum tubes have been almost completely replaced by solid state electronic devices, there are still a few applications where vacuum tubes are used. One of these is in guitar amplifiers. As there are few companies still producing new vacuum tubes, most of the tubes used in amplifiers are old. The electric guitar was invented in the early twentieth century after the advent of the vacuum tu...
متن کاملK3EDTA Vacuum Tubes Validation for Routine Hematological Testing
Background and Objective. Some in vitro diagnostic devices (e.g, blood collection vacuum tubes and syringes for blood analyses) are not validated before the quality laboratory managers decide to start using or to change the brand. Frequently, the laboratory or hospital managers select the vacuum tubes for blood collection based on cost considerations or on relevance of a brand. The aim of this ...
متن کاملThe Synthesis of Carbon Nano Tubes by Arc Discharge Method in Liquid media
In this investigation a simplified arc discharge apparatus was used to synthesize mullti-wall carbon nanotubes. Because of not requiring vacuum equipment, heat exchange system, active or inert gases, this method is found to be cheaper and simpler than traditional arc discharge in gas environment. Using this method, CNTs are produced by performing an arc discharge between two graphite electrodes...
متن کاملEvaluating the Products Quality of the Vacuum Distillation Unit by Using MFCA Method
The distillation unit is one of the main units in refning companies, and it serves as the mother unit in any refnery with any degree of complexity. The optimization of this unit can increase productivity. In this study, the vacuum distillation unit of a refnery was selected as the case study. The shares of different expenses of this unit were clarifed using a novel material flow cost accoun...
متن کاملEffectiveness of Bench Top Non-Vacuum Autoclaves on Dental Turbine Chamber Sterilization
Introduction: Dental turbine chamber is a suitable reservoir for living microorganisms, so chamber sterilization is necessary for reducing cross contamination risk. On the other hand, in non-vacuum autoclaves, steam penetration into turbine chamber is doubtful, while they are still in use in dental clinics. In this study, performance of small non-vacuum autoclave in turbine chamber sterilizatio...
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تاریخ انتشار 2014