Today's Message Index:
----------------------
 
     1. 11:04 AM - Antenna installation (Robin Hou)
     2. 01:43 PM - Re: Antenna installation (Doug McNutt)
 
 
 

Message 1


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Time: 
11:04:46 AM PST US
From: 
Robin Hou <rmhou@yahoo.com>
Subject: 
Antenna installation
      
      My Terra radio installation instruction says "Proper attachment of any antenna
      to the aircraft surface is of primary importance. Carefully clean all paint and
      corrosion off the mounting surface and apply an anti-corrosion treatment." 
         
        Question 1., does "clean all paint" mean strip all paint to bare aluminum?
         
        Question 2., what type of "anti-corrosion treatment" should I use?
         
        Thanks in advance,
         
        Robin Hou
      
             
      

Message 2


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Time: 
01:43:07 PM PST US
From: 
Doug McNutt <douglist@macnauchtan.com>
Subject: 
Re: Antenna installation
      
      
      At 11:00 -0700 5/22/08, Robin Hou wrote:
      My Terra radio installation instruction says "Proper attachment of any antenna
      to the aircraft surface is of primary importance. Carefully clean all paint and
      corrosion off the mounting surface and apply an anti-corrosion treatment."
      
      Question 1., does "clean all paint" mean strip all paint to bare aluminum?
      
      The idea is to be sure the metal parts of the antenna are well grounded to the
      skin of the aircraft. Assuming you're talking about a VHF comm antenna the aircraft
      skin works like a more or less flat mirror making the antenna look twice
      as long and fed at the center.
      
      The screws that hold the antenna down are not very good as conductors of radio
      frequency  current. Metal to metal all around is good.
      
      
      Question 2., what type of "anti-corrosion treatment" should I use?
      
      
      They're probably thinking alodyne but I doubt that it's necessary. Others suggest
      a ring of bathtub caulk (silicone) around the outside of the installed antenna.
      What you don't want is an insulator like an anodized surface or a paint primer.
      
      -- 
      -->  The best programming tool is a soldering iron <--
      
      








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