[TowerTalk] [Bulk] Re: RF Ground is a Myth

[Patrick Greenlee]

Jim, Thanks so much for your comments.  I may not have a good xformer 
for this  but... I could use my stick welder and set it on AC with an AC 
amp meter in series.  That ought to git 'er done. This adds 
complications as all my welders are mounted on my welding trailer so 
that may delay my experiment due to the prev mentioned 10 lb limit.

Thanks again,

Patrick   NJ5G


On 1/21/2015 8:15 AM, Jim Lux wrote:
> On 1/21/15 5:29 AM, Patrick Greenlee wrote:
>> I have a triangular tower with legs on 14 ft centers, yes, 14 feet, not
>> inches.  I built it with three separate concrete foundations, one per
>> leg.  It is currently tilted over so one leg is not touching its
>> concrete embedded mechanical connection/mount.
>>
>
>>
>> Am I missing something?  Will a simple ohm meter test give a reasonable
>> measure of Ufer ground quality, sufficient to decide the question of
>> whether or not multiple copper clad ground rods need to be installed and
>> interconnected?
>
> You need to use an AC source for the measurement: a DC source will 
> cause polarization and the reading will be low resistance at first and 
> then rise (think as if it were an electrolytic capacitor). The other 
> thing is that a typical solid state multimeter uses such low 
> current/voltage that you're going to see strange readings.
>
> if you have something like a 12-24V AC transformer around (12.6V 
> filament transformer, landscape lighting, bell transformer), you can 
> use it: measure voltage and current, and you can go from there.  You 
> can even use 110V (with an isolation transformer from the line, please!)
>
>
>
>
>>
>> Is it too much of a leap of faith or otherwise to assume the inter-leg
>> resistance is an adequate predictor of tower mount to Mother Earth
>> conductivity?
>>
>
> Nope.. that's pretty much how they do it.
>
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