In a message dated 08/05/2007 22:41:16 GMT Daylight Time,
kbrowning@... writes:
I f the potting is being used primarily for protection, please think again.
There are other products that will offer possibly better protection, yet
allow repairs or changes to
be made.
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Hi Keith
In the instance we were discussing the manufacturer, Wellbrook, is using a
hard potting compound to prevent investigation of their products.
I agree a conformal coating would be more user friendly but that's quite the
opposite of what they intend:-)
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Here in New Zealand, my enquiries for conformal coatings either bring on a
blank expression or
various other unsatisfactory products.
I offer this advice in case this option is not known, AND more to the point
does any one know what
the product is and where it may be purchased.
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As you comment the term "conformal coating" is generic and describes a type
of product rather than one specific product.
One manufacturer's definition is given here......
_.
asp_
()
I'm not sure why you should be having so much trouble locating product, Dow
Corning is just one manufacturer of such products and a google search brings
up a lot of information.
In the past I've bought conformal coating products from Farnell and RS, both
distributors in the UK, and I'm sure there would have been plenty of other
outlets too.
Both also used to carry a spray on transparent plastic coating for PCBs in
an aerosol can, and I've used this succesfully too on PCBs having some
atmosperic exposure.
PCBs could be reworked just by using a hot soldering iron to melt through
the plastic coating....although the smell was a bit off putting at times:-)
I don't know if either are still available but both catalogues can be
browsed online and google again will find them.
regards
Nigel
GM8PZR
