[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [TCML] My woeful RF ground experiments and lots of questions.

> Lots of ways...
> 
> How big is your coil? NST or Pole Pig sized?

It's a potential transformer, rated 1500VA but I'm told it can
go as high as 4000VA or so, so 'in between an NST and a pole pig'
 
> One of the best ways to make an RF ground is to build
> yourself a 
> counterpoise... Make a carpet or mat of chicken wire
> (aviary netting) 
> that has a radius about equal to the height of your topload
> above the 
> ground (e.g. if your topload is 3 ft off the ground, make
> it 6 feet in 
> diameter).

This is definitely doable. I've never heard about such an apparatus in coiling, I'll investigate it further. Does anyone else on the list use this?
 
> Not only does this provide a nice short path for RF to get
> back to the 
> base of your coil, but it also forms a big capacitor to
> "real" earth, so 
> that any RF current flowing outside can also flow back to
> the secondary.
> 
> Hook the counterpoise to your electrical safety ground
> (usually at the 
> coil, e.g. if you have  NST, and you ground the case of the
> NST, ground 
> to the same place.

So do I still need earthen ground rods for the electrical safety ground.
My potential transformer isn't at the coil, it's several feet away and it's ground screw attachment (outer metal casing) is by the primary 120V input side. Do I ground that to the counterpoise instead of the green wire AC ground coming from the wall?

> I wouldn't hook the coil to your water pipes.
> 
> I wouldn't trust the surge protector/UPS to protect
> against the RF 
> signals from the coil.  They're designed to take the
> occasional single 
> transient, not repetitive pulses at 120 Hz, which is what
> the TC puts out.
> 
> Jim
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxxxxxx
> http://www.pupman.com/mailman/listinfo/tesla


      
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla