PET help

[Dwight K. Elvey]

Hi Bryan
 It is a type of silicon grease ( NOT heat sink grease ).
It is not really a cleaner but unlike petroleum grease,
it has vary low film strength. In other words, it is
a poor lubricant. When the contacts scrape together,
surface oxides are scraped off and the grease protects
the new surface from degrading because of air contact.
 There are similar products sold through hi-fi shops
but I've been using DC#4 ( Dow Corning #4 ) for a long
time and trust it. You can get it at many electric
shops ( you know lighting and wiring ) as well as
mail order, like McMaster-Carr.
 In a pinch I've had good luck with automotive products
like SilGlyde grease and other dielectric greases.
 It is good for most any electrical connector since it
is non-conductive. It works best on connection that carry
High current, like power supply connectors. It also works
well on connectors that have vibration issues, like the
RAM pack connected to the back of a Sinclair ZX81.
 It does lubricate slightly so one should make pins on
things like EPROMs at 90 degrees relative to the package,
so they don't have spring tension that tend to pop them
out of the sockets. This is probably a good idea to do
with plastic ROM packages as well for reliability reasons.
Stressed pins, from automatic insertion methods, tend
to increase the likelihood of pin to chip failure.
Dwight


>From: "Bryan Pope" <bpope at wordstock.com>
>
>And thusly Dwight K. Elvey spake:
>> 
>> Hi
>>  I'll make my standard comment here. Putting
>> DC#4 or similar materials onto pins before
>
>DC#4?  What is that?  Some sort of contact cleaner?
>
>Cheers,
>
>Bryan
>
>
>> putting things back together will make a difference.
>> This is especially true for the power pins that
>> would otherwise tend to over heat because of
>> contact resistance.
>> Dwight
>> 
>> 
>> 
>
>