[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [TCML] Fried It !
Hi Gary,
Thanks, knew I was taking chances but thought I had a better handle on
protection.
The coil was about 10-11 feet from the control unit, this was also the first
time I have run the coil on that side of the garage; maybe shouldn't run it
there...
Using 3 NSTs rated at 12,000 / 30mA each, so 90mA right now.
Yes, what I expect was the real culprit was the 8 zone wiring coming into the
garage and up the wall connecting to the controller. Here's where I'm thinking
to use the ferrite cores as close to the control unit as possible. Maybe even
inside the unit.
My RF Ground is an 8' ground rod pounded into the year outside the garage. The
connection is a 10 AWG stranded insulated wire 18' long. The mid-point
secondary grounds on the NSTs, the ground on the Terry filter, and the lower end
of the secondary coil are all tied to this RF ground. The EMI filters
connecting to the primary side of the NSTs are grounded to the mains ground;
these two grounds are not shared.
The good news is that after a complete shutdown, disconnecting the zone modules
from the controller, and a reset/restart, everything seems to be back to normal
working order. Just have to reprogram, and watch for the water bill....
Thanks for any pointers Gary.
Miles
________________________________
From: Gary Lau <glau1024@xxxxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Sent: Mon, November 8, 2010 5:13:25 PM
Subject: Re: [TCML] Fried It !
Ouch!!! But ferrite cores can only do so much. There may be other things
than can be done. But yes, we all take chances coiling.
Can you describe how close to the coil the irrigation unit was?
How powerful is the coil (NST size? pig-powered?)
Are there any cables running to the irrigation unit, besides the AC power
cord?
And can you describe the RF ground and cable to it you had for your coil?
Regards, Gary Lau
MA, USA
On Mon, Nov 8, 2010 at 2:21 PM, Miles Mauldin <teslamiles@xxxxxxx> wrote:
> Hi All
> I’m getting better at tuning and squeaking performance out of my SGTC.
> Last
> night I was able to get multiple 30” streamers into free air and strikes to
> a
> grounded rod at nearly 40”. I have been worrying about killing one of the
> garage door openers, and household electronics and computers, but knock on
> wood
> to date nothing has been affected. That is until last night. Sad and
> funny at
> the same time, of all the things I worried over none of them were
> affected. It
> was my irrigation system controller that got fried. I say funny, but it
> was not
> until this morning that I discovered there was a problem when I saw a river
> of
> water flowing down the street in front of my house. Further inspection in
> the
> back yard revealed 3 of my 8 water zones were running at the same time.
> One of
> them is for the waterfall and pond to keep it replenished during the hot
> summers. Needless to say, the pond was flooded. I had to shut off the
> water
> for the irrigation system at the street because the only thing I could get
> from
> the control unit was a flashing “ERR”. Good thing it Fall here and I don't
> really need to water for a while.
> Do we just take our chances coiling? Or does anyone have experience
> protecting
> electronics near / around a TC? Maybe ferrite Cores like
>
>http://leadertechinc.com/ferrishieldproducts.shtml?_kk=ferrite%20core&_kt=7dfff0ae-33b0-45b1-b704-1bf2fc1d08ec&gclid=CM6pnff3kaUCFRhg2godtWjaMg
>g
> on
> any wires that would act like an antenna?
> Watching for the water bill.....
> Miles
>
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla