I really don't like using Superflex (FSJ) outdoors. The jacket on FSJ is
much thinner than it is on LDF, making it easier to get water in due to a
small nick. Also, the corrugation on FSJ is helical (spiral), whereas LDF
is annular ("rings"). The helical corrugation also makes it easier for
water to spiral down the line in the vent you get a knick in it somewhere
along the vertical run. Granted, the effects of water trapped between
jacket and shield isn't a huge problem; it's when the water gets forced into
the connector body and ends up flooding the contact interface that you
really have a problem...
If you want the installation to last, hold out for LDF. You might find 7/8"
cheaper on the surplus market than 1/2" because it's more commonly used,
especially in longer lengths.
--- Jeff WN3A
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Chris Curtis
> Sent: Tuesday, February 24, 2009 5:13 PM
> To: [email protected]
> Subject: RE: [Repeater-Builder] WANTED: heliax
>
> I appreciate the tips on where to find the stuff.
>
> Does anyone have an opinion of installing the FSJ product
> instead of the LDF
> product?
>
> Remember, my budget gives me 2 options at the moment.
>
> LDF1 1/4 inch OR the cheap on ebay FSJ4 1/2 inch.
>
> That's the crux, is flexi BAD for a run from the antenna to the shack?
> Both connection points are weather proof.
>
> Thanks
> Chris
> Kb0wlf
>
> -----Original Message-----
> From: [email protected]
> <mailto:Repeater-Builder%40yahoogroups.com>
> [mailto:[email protected]
> <mailto:Repeater-Builder%40yahoogroups.com> ] On Behalf Of Curt Seaton
> Sent: Tuesday, February 24, 2009 4:05 PM
> To: [email protected]
> <mailto:Repeater-Builder%40yahoogroups.com>
> Subject: Re: [Repeater-Builder] WANTED: heliax
>
> For heliax at 'make offer' prices, check the equipment for
> sale listings
> on the GNARC.org web page. This is good quality and some have
> connectors already mounted. Shipping will be a problem.... Good
> luck. It is good stuff especially for VHF and UHF
>
> 73
>
> Curt W1FSM
>
> Chris Curtis wrote:
> > Ok, so I also could use some heliax.
> >
> > Now, I understand fsj is the flexi but is it really that
> bad to install
> from
> > antenna to shack?
> >
> > The reason I ask is there is some fsj4 on ebay. No ldf in any
> considerable
> > length.
> >
> > I was looking at ldf1 but got quoted 1.25 a foot vs 190.00
> for 250' of
> fsj4.
> > Yes, I realize they are also 2 difference diameters
> >
> > 100' run times 2 is what I need. Give or take.
> > 1 for the actual repeater antenna system and 1 for a 70cm
> beam antenna for
> > rx.
> >
> > I looked at the loss charts, so I'm just asking about the mechanical
> sanity
> > of using flexi vs not so flexi.
> >
> > So, what's the thought on all that?
> >
> > Thanks for the bandwidth.
> >
> > Chris
> > Kb0wlf
> >
> >
> >
>
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