PS Magazine - TB 43-PS-619
PS, The Preventative Maintenance Monthly
ISSUE 619
JUNE 2004
D
o
you
know the difference between waterproof and water resistant?
Waterproof means an item can battle water intrusion and always win. Water resist-
ance puts up a good fight against water intrusion, but sometimes loses the battle.
The power entrance box on digital group multiplexer shelters is water
resistant,
not waterproof! If you hit the power entrance box with high-pressure water, water
will get in the box. You do not want water in the box!
Once the water is in, it can’t get out. That means internal circuits and other elec-
tronic components will soon corrode or short out.
So, if you’re cleaning a shelter with high-pressure water, do not aim at the power
entrance box. Spray away from it and clean it by hand with non-pressurized water
like that from a garden hose.
Keep in mind that this problem has been most noticeable with the power entrance
box, but most seals are water resistant and not waterproof. If you absolutely must
use high-pressure water to clean your shelter, try to avoid any areas that are depend-
ing on a seal to keep out water.
PS 619
JUN 04
43
AN/GRC-103 Radio Set…
W
e know it’s not unheard of for the indicator in the receiver meter of your
AN/GRC-103 radio to stick. You know that, too.
We also know that when it sticks, one way to unstick it is to tap the meter glass.
You know that, too.
We also know that a light tap with
the knuckle of a finger is all that is
needed to unstick the indicator. That
you don’t seem to know!
We know you don’t know because
the meter glass is getting broken.
We’ve heard through the grapevine
that the handle of a screwdriver or
another tool is doing the damage.
You’re smackin’, not tappin’!
Just use a knuckle to tap on the meter glass. If the knuckle doesn’t do the trick, a
harder rap with a tool won’t do it either. The only thing you’ll accomplish is break-
ing the meter glass and turning one problem into two.
PS 619
JUN 04
42
Digital Group Multiplexer Shelters…
Wash Day Blues
Tap transmitter
meter with your
knuckle
awright,
awright…
I’ll move
already!
{ouch!}
I didn’t
deserve
that!!
one of
these things
is water
resistant,
but
NOT
waterproof!
Tap
it!!
Don’t
Smack
it!
619. 42-43 (C)
4/29/04
5:53 PM
Page 1
Click here for a copy of this article to email to a friend
Click here for a copy of this article to email to a friend
Back to TopBack to Top
