Glen , I know some will think If I am to dumb to know what they are ,
Then I do not need them . But I still would like to know in layman terms
what is a INVAR Rodif I was guessing Maybe something that goes in a
duplexer
Thanks
Don KA9QJG
From: Repeater-Builder@yahoogroups.com
Invar is a special material. It is special that is has very low tempreture
expansion characteristics. When used for the tuning rod in a duplexer it
will compensate the expansion in the copper center conductor so that the
frequency of the cavity does not drift. I calculated a 6m cavity that uses
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