Date: Fri, 07 Nov 2014 00:28:29 -0500
From: "Roger (K8RI) on TT" <K8RI-on-TowerTalk@tm.net>
To: towertalk@contesting.com
Subject: Re: [TowerTalk] RTV where to find and (getting Long Life)
Look at the calk section at Ace. I have forgotten the name, but Dow
Corning calk of most types is sold under a different name. I believe
they sold off that consumer portion of the business some years back, but
the same materials are still available through many outlets. Reading
the fine print, or in the case of Ace, just ask.
BTW you can make the Silastic (TM) brand of RTVs (and most others last
almost indefinately by simply placing the cap on tight immediately after
using. THEN place the entire capped tube in a small tupperware box and
snap the top on. I said Tupperware as I know they work, but I'd expect
any moisture impervious enclosure that has a tight fittinf lid with a
seal that doesn't leak would be fine.
I have tubes that have been opened and stored in this manner that are
still good and appear to meat their original specs.
Most Silastic(TM) RTV has an acid like smell and works fine where it is
not confined. There are also versions that are non corrosive that use
Alcohol (the stink)
I use the plain old stuff out doors. It'll turn copper green, but still
works. Never cover uncured RTV that has that acid smell with tape until
it has thoroughly cured! Even the non acid type should never be covered
until it has been cured. Incidentally, most RTVs use the moisture in
the air to cure.
73
Roger (K8RI)
## I was told the RTV used in aquariums,sold at pet stores... does not smell
like acetic acid... IE: vinegar. I bought some at the local aquarium
store....
and it smells like vinegar ! You would think that the rtv sold in aquarium
stores...
would not smell like vinegar.... that stuff would surely kill off the fish in
any tank.
## 88 and 33 tape work good. Ok, what do you do where the PL-259 etc..screws
into the mating female ? The only thing I have come up with that sorta works
is
T+B heat shrink, industrial type. Wrap with 33/88 tape 1st..then the heat
shrink.
U get water into the excess threads on a so-239 female... it will migrate into
the
Pl-259.
## in line splices are easy. male-double female-male. Just wrap with 33/88
tape, then
heat shrink the entire mess.
Jim VE7RF
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