Last night's session of the Northern Nevada Preppers Group Net has been posted.
We talked about the importance of Timepieces For The Prepper.
Here's your link:
http://www.nnpg.net/020117_radio.shtmlHere's the chat room transcript:
NNPG - The Northern Nevada Preppers Group Chat
7:59:11 PM
Ken K7KBJ joined the channel
7:58:16 PM
Ken K7KBJ
Hi
7:58:17 PM
JDY joined the channel
7:58:25 PM
Ken K7KBJ
Hi JDY !
Tonight's topic is Timepieces For The Prepper
7:59:01 PM
KG7MZO
Good evening JDY
7:59:01 PM
TWP joined the channel
7:59:35 PM
TWP
Hmmm. Nobody gets to be admin?
7:59:48 PM
Ken K7KBJ
Tonight's topic is Timepieces For The Prepper
8:00:54 PM
TWP
The user interface does not show who is in the admin position. I logged out and rebooted just in case.
8:04:08 PM
JDY left the channel (timeout)
n7sax joined the channel
8:06:53 PM
n7sax
Good evening
8:07:02 PM
TWP
Hi SAX
8:07:10 PM
n7sax
This is the topic I suggested awhile back
I have perspective to offer
8:08:07 PM
JDY joined the channel
8:08:17 PM
TWP
Hi Jerry
8:08:32 PM
Ken K7KBJ
Hi everyone !
8:09:53 PM
TWP
I'll have a document posted to the NNPG forum with various plans for making clocks.
8:10:09 PM
n7sax
For the longest time I have had Seiko electric watches, fantastically reliable and accurate but vulnerable to an EMP and batteries wear out.
8:10:13 PM
JDY left the channel (timeout)
8:10:14 PM
Ken K7KBJ
Good TWP, that would be very interesting.
8:10:24 PM
TWP
I'll post it after tonights session
8:10:26 PM
n7sax
I agree with the Gentleman speaking now.
8:10:55 PM
Ken K7KBJ
That is David, K7DWW
8:10:56 PM
n7sax
Wind watches and Automatics are quite a bit less reliable
It seems to me that even a windup watch and automatic with their FINE springs might be lit-up by an EMP.
I would really like to get a physicist's opinion on whether an EMP could damage the springs in mechanical watches that MUST resemble electric/electronic coils
8:14:10 PM
Ken K7KBJ
Interesting point, SAX.
8:14:23 PM
n7sax
I typed less reliable I Meant To Say less accurate...
8:15:27 PM
TWP
It (EMP damage) is a function of the length of the metal element (antenna). The metal case of the watch will serve as a partial shielding from EMP, but not total...
8:16:43 PM
Ken K7KBJ
I wonder if having the metal case of the watch touching the arm would help ground it to minimize any damage which might occur inside of it.
8:16:45 PM
n7sax
II recently researched and bought a bought magnetically shielded wrist watch in (better?) preparation for an emp and I am also near magnets in my work.
If you web search for Magnetically shielded watches you will find about a dozen out there... Not very many and as I said quite expensive.
8:19:07 PM
TWP
The coiled springs, being small, may not receive enough impulse to be damaged (MAY). A factor is whether a current path is available. If the pulse induced voltage does not have path to move electrons, then little damage is to be expected.
8:20:22 PM
n7sax
The watch that is most impervious to magnetics which I think relates to sensitivity to an EMP is the Omega SeaMaster Aqua Terra 15,000 Gauss
it is made entirely of Non-Ferrous metallic parts
8:20:58 PM
TWP
Grounding is not a factor and in fact ungrounded is best. The resistance of skin is fairly high, which will reduce any current.
8:21:34 PM
n7sax
Rolex makes the "Mil-Gauss" 1000 Gauss
I bought the Seiko
He needs to explain Hack
Jerry does
8:22:22 PM
Ken K7KBJ
I have a TAG that works really well. It does have a battery so, who knows...
8:22:55 PM
n7sax
Ask Jerry to explainn Hack.... it means that you can stop the second hand
for synchronization
without the Hack, you can move the big and little hand around but the second hand continues to move
8:26:38 PM
TWP
Another factor is why you need to measure time. From very rough (day or night) to down to the second precision.
8:26:44 PM
n7sax
The Seiko with mag resistance (1,000 Gauss) model is SBGR077
ask jerry what he thinks an EMP might do to a mainspring???
8:31:04 PM
KG7MZO
KG7NSV...hahahahaha!!! Great cigar
8:32:07 PM
TWP
How many cigars can you smoke in a row?
Re battery life. I use a Casio dive watch and the battery has lasted well over a decade.
8:34:53 PM
Ken K7KBJ
Really? Never would have thought a battery could last that long.
Is it charged by a self winding mech inside?
8:35:35 PM
TWP
Really low current draw, not self winding, digital electronic
8:36:59 PM
n7sax
Jerry's explanation of the hack is not all inclusive a mechanical watch with Hack stops the second hand, if you want it zeroed, you have to "pull" the crown to stop at the desired point on the dail presumably at the 12
charge the luminous hands with a flash light at the beginning of a night move
8:41:38 PM
TWP
The Tritium will not recharge from external light. You'd need to buy one with the appropriate phosphor, not tritium (radio isotope which drives a light emitting phosphorescent chemial.
8:45:33 PM
n7sax
The Seiko 5 series of automatics are not magnetically shielded but they are very inexpensive - like $75.00
8:48:31 PM
KG7MZO left the channel (91a3bc6c0637ffec5b77e9e21f4339af0636358a)
8:48:48 PM
n7sax
Thanks Ken and everyone else, good night.
Ken are you coming to the sat morn meeting
?
8:49:30 PM
Ken K7KBJ
Was going to but I'll be out of town again, dammit !!!
8:49:34 PM
TWP
Night all
Thanks Ken
8:49:42 PM
Ken K7KBJ
gnite!
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