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Article #14820Re: Tube primer?
From: Todd Inch
Date: Thu, 19 Nov 1992 21:20
Date: Thu, 19 Nov 1992 21:20
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In article <1992Nov14.073048.5200@weyrich.UUCP> uunet.uu.net!weyrich!orville writes: >Note -- the above looks a lot like a collector-coupled NPN transistor >circuit also -- emitter is like cathode > base is like grid > collector is like plate. Except applying voltage to the grid decreases current flow from the cathode to plate while applying current to the base of a NPN (BJT) increases the collector-emitter current. So, a tube works more like an FET from a practical standpoint. I believe the europeans used to (still?) call tubes "valves" since they limit/ allow the flow of current. Hence the reference designator "V" on schematics. It's been awhile since I've thought about this!
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arc1-ca.pugleaf.net!sparky!uunet!zaphod.mps.ohio-state.edu!saimiri.primate.wisc.edu!caen!batcomputer!cornell!uw-beaver!fluke!gtisqr!toddiReferences:
<1992Nov06.234842.190001@zeus.calpoly.edu> <1992Nov14.073048.5200@weyrich.UUCP>Show Full Headers
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Newsgroups: sci.electronics Path: arc1-ca.pugleaf.net!sparky!uunet!zaphod.mps.ohio-state.edu!saimiri.primate.wisc.edu!caen!batcomputer!cornell!uw-beaver!fluke!gtisqr!toddi From: toddi@mav.com (Todd Inch) Subject: Re: Tube primer? Message-ID: <1992Nov19.212057.29180@mav.com> Organization: Maverick International Inc. References: <1992Nov06.234842.190001@zeus.calpoly.edu> <1992Nov14.073048.5200@weyrich.UUCP> Date: Thu, 19 Nov 92 21:20:57 GMT Lines: 16