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Article #2226Re: HV protection for receiver input?
From: Gym Bob
Date: Wed, 06 Aug 2003 23:20
Date: Wed, 06 Aug 2003 23:20
25 lines
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2287 bytes
Hell, put a zener diode into the gate of a Triac and use crowbar overvoltage protection! When a high enough disturbance makes the zener conduct the triac will short the whole thing right to ground/frame until the charge is gone then release. "Ken Smith" <kensmith@violet.rahul.net> wrote in message news:bgr65s$siv$3@blue.rahul.net... > In article <bgr1dh$2m7$1@news.eusc.inter.net>, > Jerry G. <jerryg50@hotmail.com> wrote: > [.... neon lamp ...] > >In your case you want to use it as a hard voltage clamp. Put a resistor > >of about 27 to 33 ohms in series with the lamp, to allow isolation from > >its capacitive characteristics. The stray capacitance of the lamp is > >about 3 to 5 pF. > > I disagree with adding the resistor. Just find a way to live with the > extra 5pF. The resistor in series with it will cause losses. The 5pF > will cause a mistuning that may either be unimportant or easy to correct > for. > > -- > -- > kensmith@rahul.net forging knowledge >
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 112d1e,5731ee67b7a682a6 X-Google-Attributes: gid112d1e,public X-Google-Thread: 103407,5731ee67b7a682a6 X-Google-Attributes: gid103407,public X-Google-Thread: 1131b0,5731ee67b7a682a6 X-Google-Attributes: gid1131b0,public X-Google-Thread: 10d137,5731ee67b7a682a6 X-Google-Attributes: gid10d137,public X-Google-ArrivalTime: 2003-08-06 16:08:31 PST X-Abuse-Report: abuse@teranews.com Message-ID: <4a7a3b7a1b561e37c5ee768af015fb55@free.teranews.com> Path: arc1-ca.pugleaf.net!archiver1.google.com!news1.google.com!newsfeed.stanford.edu!cyclone.bc.net!snoopy.risq.qc.ca!news.primus.ca!news.primus.ca!chi1.webusenet.com!news.webusenet.com!newsfeed-east.nntpserver.com!nntpserver.com!free.teranews.com!not-for-mail Date: Wed, 06 Aug 2003 23:20:50 GMT Lines: 27 From: "Gym Bob" <NoThanx@notspam.com> Newsgroups: sci.electronics.design,alt.engineering.electrical,sci.electronics.repair,aus.electronics References: <0001HW.BB56508400106C52F0386600@news.individual.net> <bgr1dh$2m7$1@news.eusc.inter.net> <bgr65s$siv$3@blue.rahul.net> Subject: Re: HV protection for receiver input? X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2800.1106 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1106