On 18/09/14 04:52, Lostgallifreyan wrote:
These were convenient being all on one connector, and small, but they do
*not* like being exposed to weather much. I was replacing them on a
regular basis. The regular DB15 might be better, I haven't tried.

I remember someone posting about a motorbike and weathering of various
plugs (maybe you?).

Probably not me. I've been on the back of a motorcycle exactly once and
ridden a quad-bike once. My bikes are very much motor-less.

http://stuartl.longlandclan.yi.org/b.../09/vk4msl-bm/

I can't remember the details, but I
think he found a part-answer in using lots of PFPE grease to exclude water.
The stuff is often used on vehicles because it tends to stay put and not form
a grinding paste with all the grit that lands on it.

Interesting concept, I wonder how that affects conductivity…

Stuart Longland wrote in
:

I can't remember the details, but I
think he found a part-answer in using lots of PFPE grease to exclude
water. The stuff is often used on vehicles because it tends to stay put
and not form a grinding paste with all the grit that lands on it.

Interesting concept, I wonder how that affects conductivity…



Not a lot, I think. I just did a test, I smeared a bit of Krytox on the
tip of my index finger, trying to get it even and about 0.25mm thick, then
zapped it with a peizo gas ignitor. It took several shots to get a spark to
find a weak spot through it, or any sensation of electric shock, so I'd say
it's pretty good, and likely to protect against ESD too if you fill a Dsub
pin shroud with it.

Stuart Longland wrote in
:

I can't remember the details, but I
think he found a part-answer in using lots of PFPE grease to exclude
water. The stuff is often used on vehicles because it tends to stay put
and not form a grinding paste with all the grit that lands on it.

Interesting concept, I wonder how that affects conductivity…


My last post didn't interpret you correctly, I think. Krytox is a light
grease, it's firm but has a low vicosity. When two moving parts meet it tends
to part between them rather than goop between them, hence beign best to use a
good chunk of it. It's easily displaced under the pressure of metal contacs
so I doubt it would harm the electrical contact. It's also white, making it
very easy to examine for gubbins and grit, etc.