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- Newsgroups: sci.electronics
- Path: sparky!uunet!spool.mu.edu!umn.edu!csus.edu!netcom.com!billmcd
- From: billmcd@netcom.com (William B. McDonald)
- Subject: Re: Static electricty problem
- Message-ID: <1992Dec18.025106.5574@netcom.com>
- Organization: Netcom - Online Communication Services (408 241-9760 guest)
- References: <1992Dec10.001559.1608@miavx2.ham.muohio.edu>
- Date: Fri, 18 Dec 1992 02:51:06 GMT
- Lines: 31
-
- had a simmilar problem to this a few years ago with
- a printer. When there is a static discharge, you have a
- spark gap transmitter very close to the electronics
- you wish to protect. What I found worked was grounding
- the metal plate ( drawer in your case ) through about a
- 100 to 470 ohm half watt carbon comp resistor. This tend to dampen
- the transmission and bleed of the charge. A commercial
- anti static pad may work as well, and they are cheap to
- try. Grounding the metal plate just made a nice 1/4 wave antenna
- and did not fix the problem. The next step beyond adding the
- resistor is to add a metallic shield between the object
- being touched and the electronics being protected.
- This can start to cost money.
-
- The failures I had were some what random, so I used a
- static gun and would try about ten zaps. On unprotected
- units I would get 8-9 failures, and on protected units
- abut one failure out of twenty. It might be usefull
- to try to keep good data as you try an empiracal solution.
- Best of Luck.
- billmcd@well.sf.ca.us
- Bill McDonald
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