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RE: Thunderstorms & Drake 2880



Be careful with "DC short" type grounds.  Problem with those is that they
can resonate (ring) at the frequency of the shorting stub.  I don't know how
much energy is present at microwaves in a lightning strike but even if it's
only a few hundredths of a percent of the total it's quite significant.
Choke types are much better than shorting stubs.

Kevin, WB5RUE

-----Original Message-----
From: owner-AMSAT-BB@AMSAT.Org [mailto:owner-AMSAT-BB@AMSAT.Org]On
Behalf Of Frederick M. Spinner
Sent: Monday, May 21, 2001 12:43 PM
To: amsat-bb@AMSAT.Org
Subject: Re: [amsat-bb] Thunderstorms & Drake 2880


How about a shorted 1/4 wave (or 3/4..etc.. mult of 1/4 wave) stub
instead of the coil choke for static protection?

Fred W0FMS

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