I have pretty different needs on a mountain top in Western Colorado… I need to
shield my cables from pack rats who will chew on it. I use very inexpensive
irrigation tubing which is made for in ground lawn sprinkling systems. This can
be buried or tied in runs above ground.
On Oct 8, 2013, at 5:58 AM, "Shoppa, Tim" <tshoppa@wmata.com> wrote:
> I think the British word "trunking" is what we in the US would call "cable
> tray", metal trays with removable metal lids.
>
> Cable tray is very nice for cable management. Solid bottom galvanized cable
> tray, the kind specified by standards where I work, is hard to justify in
> cost until dozens of cables are laid in it and total cost of wire management
> over decades starts becoming important.
>
> While cable tray lids offer some shielding to 60Hz and audio frequencies, it
> is markedly inferior to well fitted metallic conduit for RF shielding.
>
> I've seen cable tray used inside the shack for cable management in some nicer
> ham station pictures. It would be very hard to justify the substantial cost
> for a long cable tray run between shack and antennas.
>
> Tim N3QE
>
> ----- Original Message -----
> From: Dave G4GED [mailto:radiodave.g4ged@tiscali.co.uk]
> Sent: Tuesday, October 08, 2013 03:17 AM
> To: topband@contesting.com <topband@contesting.com>
> Subject: Topband: Outdoor cable trunking - opinions pse
>
> Hi all,
>
> I want to re-run all my TX and RX antenna feeders through trunking
> (detachable lid type), fixed along the bottom of a new 200ft timber fence.
> This will give protection and future flexibility that burying or closed
> conduit methods wont.
>
> The question is...to use galvanised steel or PVC?
>
> I'm favouring steel because when earthed, I believe it will give extra
> noise screening for the RX feeders but are there any down sides such as
> "oven effects" in hot summer sun or "diode effects" between lids and
> sections, or any other problems?
>
> PVC is a bit cheaper but wont offer the extra screening.
>
> Does anyone have any relative experience please?
>
> Thanks in advance.
> Dave G4GED
>
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> Topband Reflector
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