[time-nuts] GPS Antenna Install
lists at rtty.us
Sat Mar 16 14:11:59 EDT 2013
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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> "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
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