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- Newsgroups: sci.electronics
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!linac!att!cbnewsk!cbnewsj!att-out!pacbell.com!ptsfa!dmturne
- From: dmturne@ptsfa.PacBell.COM (Dave Turner)
- Subject: Re: Tube primer?
- Reply-To: dmturne@PacBell.COM (Dave Turner)
- Organization: Pacific * Bell, San Ramon, CA
- Date: Fri, 20 Nov 1992 01:03:22 GMT
- Message-ID: <1992Nov20.010322.2585@ptsfa.PacBell.COM>
- References: <1992Nov06.234842.190001@zeus.calpoly.edu> <1992Nov14.073048.5200@weyrich.UUCP> <1992Nov19.212057.29180@mav.com>
- Lines: 20
-
- In article <1992Nov19.212057.29180@mav.com> toddi@mav.com (Todd Inch) writes:
- >>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.
-
- That should read: "applying *negative* voltage" to the grid decreases current
- flow....
-
- Applying positive voltage to the control grid will increase current flow.
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- --
- Dave Turner (510) 823-2001 {att,bellcore,sun,ames,decwrl}!pacbell!dmturne
-