[Skimmertalk] lightning protection for skimmer

[Dai NAGAKURA]

Dear Saki 

I use AS-303U
https://www.arraysolutions.com/as-303u

or if you need not high power, Diamond Antenna's is popular in JA.
https://www.diamondantenna.net/sp1000.html

..and connect hand-made  lump fuse RF guard.
http://www.k8nd.com/Radio/Planning/CQWW160/RG_2000M_SCHEMATIC_090201.pdf
( This is from K8ND's page )
just before SDR.

These are very cheap than SDR .
GL

Dai JF2IWL



On Fri, 15 Jun 2018 11:11:57 -0400
N4ZR <n4zr at comcast.net> wrote:

> I would encourage you to use a Polyphaser device in the feedline, 
> provided that you can find one that doesn't block DC voltage to your 
> active antennas, and to disconnect the feedline whenever possible.? In 
> addition, I would use surge protection on the mains power to your nifty 
> little box, because another RBN-op just reported a truly cataclysmic 
> lightning event in which the main damage was done by a surge on the 
> electrical neutral.? About the only thing that didn't get fried was his 
> QS1R.
> 
> 73, Pete N4ZR
> Check out the Reverse Beacon Network
> at <http://reversebeacon.net>, now
> spotting RTTY activity worldwide.
> For spots, please use your favorite
> "retail" DX cluster.
> 
> On 6/15/2018 10:50 AM, dd5xx at web.de wrote:
> > Hi all,
> >
> > I'd like to hear what kind of protection measures you guys take for your skimmer. I am preparing two skimmers, both are installed inside the same housing with lots of additional stuff like pre-amps, filters, network switch, mini computer, etc. Each skimmer is fed with an active antenna "mini-whip" which will be installed about 7m above ground level or 5-6m about roof level (which is at 10m height). The value of this box is about $2000 and the stuff is very sensitive. I am afraid even a nearby lightning strike could destroy quite everything inside the box. What measures can I take next to the usual lightning protection I am used for all kind of antennas (grounding rod)? is there anything special you can suggest for this operation and which won't negatively affect received signals ? Something like a discharge protection and if so where should I install it?
> >
> > looking forward to your comments. Have a nice weekend.
> >
> > 73
> > Saki, DD5XX
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> >
> 
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-- 
Dai NAGAKURA <ndai at cameo.plala.or.jp>