[time-nuts] GPS Antenna Install
nerd at verizon.net
Sat Mar 16 14:35:29 EDT 2013
I know more about substation grounding, where exothermic welding is frequently
used, although there are some approved mechanical clamps.
On 3/16/2013 2:11 PM, Bob Camp wrote:
> Better check the electrical code in your area. They likely are quite specific about what you can and can't do with a proper ground connection. Copper / copper welding generally means brazing or soldering. Both are often prohibited due to the heat burst at the joint during a lightning hit. That surprised me a bit the first time I ran into it, but made sense once I dug out the explanation.
> On Mar 16, 2013, at 1:42 PM, Don Latham <djl at montana.com> wrote:
>> ground rods usually thin copper clad over steel. Better to use proper
>> copper clad clamps with anticorrosion paste than to try to weld.
>> Martin A Flynn
>>> On 3/10/2013 11:18 AM, Martin A Flynn wrote:
>>>> Sorry about the blank messages - not sure why I could not reply to my
>>>> own message...
>>>> In any case, thanks to the help from kind folks on the list, the
>>>> TS-2100L in in the rack at the N2MO amateur radio station at InfoAge.
>>>> The N2MO team spent yesterday doing the prep work to mount a 27dB
>>>> antenna on the gable end of the building, using 1/2 heliax for feed
>>>> line, with a Polyphaser DGXZ + 06NFNF installed in the line before it
>>>> enters the building.
>>>> The antenna mount pipe and the Polyphaser are grounded via #2 copper
>>>> cable that will be exothermic welded to the ground rod.
>>>> Thanks again!
>>>> Martin Flynn
>>>> PS - Now that the precision time bug has bitten, the team, is
>>>> considering a Rubidium standard!
>>> Precision time novice needing help ! We have chance to upgrade
>>> (replace) our existing TS-2100-L with a TS2100-GPS system with the
>>> rubidium option.
>>> What questions should we be asking the seller?
>>> * Is there a method to determine the lamp hours from the console?
>>> * Software vintage that corrects the 1PPS issue (or is it relevant)?
>>> While InfoAge is a huge site, it is not a huge budget!
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>>> and follow the instructions there.
>> "Neither the voice of authority nor the weight of reason and argument
>> are as significant as experiment, for thence comes quiet to the mind."
>> De Erroribus Medicorum, R. Bacon, 13th century.
>> "If you don't know what it is, don't poke it."
>> Ghost in the Shell
>> Dr. Don Latham AJ7LL
>> Six Mile Systems LLP
>> 17850 Six Mile Road
>> POB 134
>> Huson, MT, 59846
>> VOX 406-626-4304
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