Seems to me that lightning protection for timenuts who put things on
masts keeps this from being completely off topic.
People who store explosives in earthen bunkers have learned from many
years of experience how far away bunkers have to be spaced so than an
explosion in one bunker won't affect ot
Well one time nut did. Think its John and a ham K5??? call.
He wrote the process up using an external supply.
Thats why I have a 3KV supply on the shelf.
Regards
Paul
WB8TSL
On Tue, Jun 19, 2018 at 8:43 PM, Perry Sandeen via time-nuts <
time-nuts@lists.febo.com> wrote:
> Yo Dudes!
> A while back
Yo Dudes!
A while back someone asked about the life of a HP Cs tube.
Fromthe HP 5061B Operators Manual:
“2.7 The shelf life of the cesium beam tube I twoyears at storage
temperatures up to +35 C (+95F) if the ion pump is operated 2 or 3 times a
year. If the ion pump is not operated to maintai
If you see St Elmos fire ‘corona discharge bleed process is working as expected
Content by Scott
Typos by Siri
On Jun 19, 2018, at 3:55 PM, Bob kb8tq wrote:
Hi
If indeed a proper ground system *could* be depended on to “bleed off” and
prevent discharge things
would be *much* simpler. Indeed I
First, I recommend the following:
http://www.arrl.org/shop/Grounding-and-Bonding-for-the-Radio-Amateur/
well worth the price.
second, bleeding off does not prevent discharge. Many such systems are
garbage or worse. "bleeding off" is corona discharge from sharp points
submitted to a large electri
Hi
If indeed a proper ground system *could* be depended on to “bleed off” and
prevent discharge things
would be *much* simpler. Indeed I’ve been on towers and decided to exit that
location as the bleed
process became audible. It very much does happen. It simply is not a 100% sort
of thing.
Bob
About that "cone of protection"
http://lightningsafety.com/nlsi_pls/cone-of-protection-myth.html
-Original Message-
From: time-nuts On Behalf Of Bill Hawkins
Sent: Monday, June 18, 2018 3:16 PM
To: o...@ozindfw.net; 'Discussion of precise time and frequency measurement'
Subject: Re: [
I put my GPS antenna only as high as it needed to be to clear any
accumulation of snow in the winter, so it is about 3 feet above the
peak of the roof of the house and about 19 feet above ground level.
The 8-inch ground-plane under the puck antenna is grounded to my radio
ground. No other prec
Probably the easiest and most economical grounding system is the halo ground
with antenna grounds bonded to the halo and the house ground bonded to the halo
as well.
The halo conductor sizing is governed by local codes, But really what you are
doing ensuring that the entire structure and eart
Hi
18” down in a swamp likely is plenty for conductivity. 18” down in a sandy
desert (or on an ice sheet) may be way
short in terms of conductivity :) The real answer to any of this is “that
depends”. (Yes, the ice sheet grounding
problem is from a real case that shows up in some class notes f
The 18” inch requirement is partially for damage resistance and partially to
ensure adequate soil moisture for conductivity.
Content by Scott
Typos by Siri
On Jun 19, 2018, at 10:50 AM, jimlux wrote:
On 6/18/18 6:39 PM, Glenn Little WB4UIV wrote:
> To do the grounding correctly, all connec
On 6/18/18 6:39 PM, Glenn Little WB4UIV wrote:
To do the grounding correctly, all connections exterior to the building
are to be welded.
The cable to ground rod welds are to be 18 inches below grade.
The exterior cable is to be number 2 copper or larger.
To bond numerous ground systems togeth
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