[Elecraft] 5119 is alive!

[G3VVT at aol.com]

In a message dated 28/09/05 16:43:04 GMT Daylight Time, bevans at hal-pc.org  
writes:

After 6  months, I'm finding the chassis screws are getting stuck in
the 2-D mounts  from corrosion or galling between the aluminum mounts and the
steel (I  guess) screws.


:---------------------------------------------------------------
Hi Bob,
 
As I understand it in certain climates there is a problem with electrolytic  
corrosion between disimilar metals, with some combinations worse than others.  
For use in my motorcycles the use of Copperslip or some similar anti-seize  
compound is essential for this purpose. Also use this for stainless to 
stainless  steel bolts/nuts to prevent what you termed as galling.
 
Had a near disaster with this very subject about five years back where our  
work airstrip Southern Avionics non directional beacon antenna was damaged in a 
 violent sandstorm. The technicians decided to impress me by getting the new  
antenna assembled before I arrived on site. Alas they had assembled the upper 
 loading coil part of it upside down and try as we might the bolts on 
stainless  steel straps retaining the loading coils would not come apart. Eventually  
after some hours work managed to loosen the straps enough to get it assembled 
 correctly. This was a warning to me at least of the problems that can arise 
with  stainless steel bolts. All it needs is a little oil, grease or 
preferably  anti-seize compound on assembly to prevent the problem.
 
Bob, G3VVT