Those look exactly like what we had 3 of in the circuit breaker cabinet in the house and condo in St Pete. A really "direct" hit will blow them up, but hopefully after they have sunk most of the energy. One big snap, and they are done.
Then again, there are more joules in a lightning strike there than they can handle. Lets face it.. the Lightning "lab" that was set up north of Daytona had 6-10 foot long glass sculptures under the tower they put up there... Anything that can turn that much sand molten is more energy than a MOV can manage to make go away easily... Rather stunning forms in various colors in the 'brown' areas of the spectrum... You can see how the lightning bolt spread after getting into the sand. KK4QDZ - Now with Extra Class Priv's, and a tiny KX3 to enjoy them! ________________________________ From: Bob <[email protected]> To: [email protected]; [email protected] Sent: Tuesday, July 15, 2014 6:14 PM Subject: Re: [Elecraft] Unhook *ALL* connections before Lightning storm There is some protection to AC surges, look here: http://www.deltasurgeprotectors.com/products.cfm?sortit=1&Category=Lightning%20Arrestors I have one on my service entrance. Does it work? I can't prove that, but anecdotal evidence seems to indicate it does. Some years ago a direct hit on a house in the next block caused a fire. I know of a TV and a control board in a dish washer that were fried, one next store and another across the street. There may have been more that I'm unaware of. I'd like to think it worked here though. It boils down to risk assessment too. That is a personal decision. I've got 50 years of motorcycling and know others that would never get on one because they are so dangerous. 73, Bob K2TK ex KN2TKR (1956) & K2TKR On 7/15/2014 5:19 PM, Buck - k4ia via Elecraft wrote: > I have had several instances of nearby impulse damage and surge voltage on > the > AC line. It could have been very expensive but for insurance. > > I would put in a plug for either the ARRL or Ham Radio Insurance Associates > equipment insurance. HRIA will cover up to $5000 in losses for $136/yr > including Mechanical Breakdown. The two policies are very different so > review > them to decide which is best for you. > > If you love your K Line as much as I do, you'll get it insured. > > Buck > k4ia > > On 7/15/2014 6:58 AM, Bill Blomgren (kk4qdz) via Elecraft wrote: >> And another warning: Nearby (like next door) lightning will be picked up >>by >> ANY long wires which end up acting as antennas. >> >> I did computer repair in Florida. I had a time share/multitasking system in >> a law office that had thousands of dollars in damage after the building next >> door got hit. >> >> The terminals were plugged into serial lines back to the central system. So >> were the printers. (Think: 6 processor unix type system with a network >> inside >> the box) >> >> The tops of ICs were all over the guts of every printer, terminal and the >> computer let out the magic smoke. ALL of the terminals and printers had >> been >> "unplugged" - but not from the RS232 connections. >> >> The ONLY way to isolate the rig is totally unplug the thing: antennas, power >> supplies and so on... same with your computers. >> >> Down in Florida, there are code required surge MOV's in every circuit >> breaker >> panel. All they do is eliminate something close by. They get vaporized by >> a >> direct hit. >> >> >> KK4QDZ - Now with Extra Class Priv's, and a tiny KX3 to enjoy them! >> >> >> ________________________________ >> From: Keith Trinity WE6R <[email protected]> >> To: [email protected] >> Sent: Monday, July 14, 2014 8:19 PM >> Subject: [Elecraft] Unhook *ALL* connections before Lightning storm >> >> Hi all, I work on K3's all day and would like to advise/remind folks >> that lightning comes in through ANY path it pleases, not just the antenna. >> Time and time again folks say they unhooked their antenna but the >> lightning took out the DSL modem, computer and K3 via the RS232 port! >> Anything connected is a potential path... >> Be safe! '73 >> Keith WE6R > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
