And that rule on disconnect everything........includes not only
antennas, but any ground path to the outside world.
Remember, all lightning protection MUST be implemented outside of the
structure. AND all driven grounds MUST be bonded together on the
outside of the structure. This is per NEC. Failure to do this last
step will produce a voltage between any 2 or more ground points due to
resistance of the earth and the current flowing through the earth from a
nearby strike. It is an I x R thing. Do the math. Even if antennas
are disconnected and equipment is off, the path of least resistance is
followed and that could be through your ground system and equipment.
73
Bob, K4TAX
On 11/6/2017 10:54 AM, Buck wrote:
An interesting factoid - the 12v rail on the K3 finals is powered even
when you turn the radio off. Thus, a power spike on the mains could
get into the radio.
Best practice is to disconnect everything when not in use.
Buck, k4ia
Honor Roll
8BDXCC
EasyWayHamBooks.com
On 11/6/2017 10:59 AM, Chuck Milam, N9KY wrote:
Hi All:
It looks like we took an EMP hit at home from nearby lightning just last
night. The XYL was up with the baby and said the whole house lit up
sometime after midnight. So far, it appears I've lost a TV, laser
printer,
the shack PC, all the outdoor security cameras, and my internet service.
As for radio gear, my Astron VS-35M power supply was showing low voltage
output, but a power recycle corrected that. The Elecraft K3 was actually
powered off and disconnected from the antennas, but it was throwing
errors
when I powered it up. I assume that was from the connection to the
computer. I did a soft reset and it seems to have recovered, but I
need to
do more thorough testing. The KX3 was only connected to power and was
powered off, and it seems to be OK so far.
The other ham radios seem to be OK, except for an old 1990s-era Radio
Shack
scanner that likely can't be replaced. I may crack that one open and
see if
there's something obvious that can be repaired.
Any advice for what other checks I should perform on my house and
equipment
(especially my K3 and KX3) to check for hidden gremlins before I start
calling the insurance companies and getting the claims process rolling?
---
Chuck Milam, N9KY
[email protected]
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