{Collins} Re: Caig Laboratories contact cleaners

Well, not exactly. 

What your reference says (regarding use on phenolic switches) is "if a 
little gets on the surrounding area, it should not be a problem, but you 
would NOT want to saturate the adjacent area".  The same reference also 
warns against using any polar liquid such as alcohol on phenolic or 
other porous materials.  Which is why I use D100L liquid on  _switch 
contacts_, or if unavailable, I spray a little D5 into the cap and apply 
it as a liquid.  I don't use ANY "spray" type cleaner on switches or any 
other "general" area of equipment.  Spraying anything other than Freon ( 
a VERY effective degreaser/cleaner ) generally does more harm than good, 
serving primarily to attract and hold dust and other contaminants.

CAIG CaiLube MCL is the recommended product for carbon pots.  It IS a 
spray, and a small shot inside a pot will make it work and feel like new.

As you say, the right product for the job IS important.  There is NO 
"magic bullet" that you can spray on with a hose and cure all ills!

73, Garey - K4OAH

Drake 2-B, B & C Line Service CDs

Robert Jefferis wrote:
> Greetings to Collins fans. Yes, some threads die hard. Concerned with the
> ultimate longevity of S-line gear and the prospect of purchasing a unit that
> may have been mistreated, I will offer a somewhat pointed opinion on the
> subject. The rotary switches in S-line gear have phenolic insulation. Caig
> laboratories clearly cautions one about using Deoxit D5 variants around
> phenolic. If you can keep it on the contact material and immediately remove
> spillover, fine. D5 variants are also not recommended for carbon element
> potentiometers as they may actually dissolve some of the carbon. 
> Here is a link that one of their applications engineers sent me to review
> some germane Q and A:
> http://store.caig.com/s.nl?sc=12
> <http://store.caig.com/s.nl?sc=12&category=8&ctype=KB&KB=215&search=phenolic
>> &category=8&ctype=KB&KB=215&search=phenolic
> I too have used Deoxit D5 and D100 products successfully for quite a few
> years. However, matching the chemical to the job is important. Fast
> evaporating, residue free cleaners are what is called for on the rotary
> switches.
> Be careful about relay contacts too. The K1 and K2 relays used by Collins
> through the years had different contact materials, each calling for a
> different cleaning method - another subject.
> Keep them running!
> 73
> Bob
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