Garry wrote:
> I was wondering if there's another Dow product under the same name
> specifically made for RF connections?
> Tony -K2MO
>
>
> Hi Tony,
>
> I remember seeing what I think you are looking for at
> "*http://radioworks.com/catalog07web.pdf*."; It is called *STUF*.
>
A note of caution when sealing/flooding connectors in coax. FLOOD ONLY
ONE END!
Flooding each end of a piece of coax does not let the coax breathe in
the normal manner. Heating in the day time will build pressure which
will force air out of the coax through the flooded material. When the
coax cools it will generate a substantial pressure drop. This much
pressure drop in a one gallon metal can will cause considerable
deformation. So it will draw in air through the flooding material
usually forming voids that may reseal. This type of breathing can cause
condensation inside the coax, usually in the braid although with some of
the older coax using a hollow dielectric it can be a problem within this
area as well. (I've found the inner conductor corroded as far as 8 feet
above the bottom connector.). It should go without saying, the coax
run should be unbroken with no flooded connectors between the one at the
antenna and the one at the rig. However with long runs terminating in
a basement or cool space, considerable condensation can occur in the
coax just like it does in conduit
I have flooded connectors in several runs in the past. I have only one
flooded at present which is at the base of the AV-640. The connector in
the matching network is not the most water proof and condensation tends
to form in the box, not to mention gunk from wasps getting in there.
As a personal opinion (developed over many years) I prefer to not use
flooding unless I think it absolutely necessary as the problems can
outweigh the benefits under normal conditions. (don't ever drop the end
of the coax containing the flooded connector on the ground. Dirt in
that stuff is very difficult to get out)
If I had a run that required flooding connectors that would be up long
term I'd invest in flooded, direct burial coax on which to use those
flooded connectors.
73
Roger (K8RI)
> 73,
> Garry - WR4R
>
>
>
>
>>
>>
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