[TowerTalk] Shack ground

[K1TTT]

Agreed, that isolation is not enough to even stop induced voltages from
damaging the cards.  And the longer the cables the worse the induced voltage
pickup problem from nearby strokes.  When I had a wired network around the
shack I would lose one or two cards every summer.  I finally resorted to
breaking the 10base2 part of the network into 3 or 4 segments when not in
use or if thunderstorms were in the area to stop the damage.  now everything
except my server and wireless access points that are all mounted in one rack
are wireless.


David Robbins K1TTT
e-mail: mailto:k1ttt at arrl.net
web: http://www.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net
 

> -----Original Message-----
> From: Pete Smith [mailto:n4zr at contesting.com]
> Sent: Saturday, June 19, 2010 10:17
> To: jimlux
> Cc: towertalk at contesting.com; Roger (K8RI)
> Subject: Re: [TowerTalk] Shack ground
> 
> 
> On 6/18/2010 8:51 PM, jimlux wrote:
> 
> "Ethernet is galvanically
> isolated, typically with at least 2000V or 5000V isolation)"
> 
> Maybe so, but don't rely on it.  I took a direct hit on my tower with all
> ham radio conductors disconnected.  Only damage in the house was a
> telephone answering machine AND both computers and the router in a wired
> Ethernet system.  Needless to say, my home network is all wireless now.
> 
> 
> 
> 73, Pete N4ZR
> 
> The World Contest Station Database, updated daily at
> www.conteststations.com
> The Reverse Beacon Network at http://reversebeacon.net, blog at
> reversebeacon.blogspot.com,
> spots at telnet.reversebeacon.net, port 7000
> 
> 
> 
> 
> _______________________________________________
> 
> 
> 
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk