David,
Glad you got that sorted out, it does make me wonder though, how do
folks manage to build DRSSTCs and not have all the components explode...
I'm wondering if you could leave hte brick grounded if it was in a cage or
something, though I suspect not. At any rate, good job!
Scott Bogard.
On Tue, Mar 18, 2014 at 7:41 AM, David Rieben <drieben@xxxxxxx> wrote:
> Hi Adam,
>
> Yes, I am still using the same treadmill motor. Like I had mentioned
> previously, I had changed up the 120 volt wiring for the RSG motor
> strictly for an asthetic upgrade, but had left the electrical layot iden-
> tical, EXCEPT, I had started grounding the exterior metal case of
> the FWB brick. That was obviously a big NO-NO, as the FWB
> was promptly destroyed as a dead short within seconds of engaging
> the spark show from my coil. And since I was trying to fire it for
> a small audience of middle school children, I tried to "push" it even
> though I could quickly tell something was seriously wrong, when it
> initially happened. As a matter of fact, I ended up actually catching
> the 10 amp, 120 volt rated RSG control variac on fire! Thankfully,
> those 35 or 50 amp, 1 kV rated FWBs bricks are relatively cheap
> and readily available on eBay, because I ended up smoking a couple
> of more before finally figuring out the grounding issue. Also, thankful-
> ly, I had a spare 10 amp, 120/140 volt rated variac that was just
> about identical to the flamed one, including an identical mounting foot
> print, so no messing up my control panel face with additional holes :^)
>
> Lesson learned: NEVER make any modifications to your known
> working coil and then try to display it in action for civilian observers
> without giving her a SPARKING "test drive", as the FWB and mo-
> tor would run fine all day with NO sparks after my modification!
>
> David
>
> From: Yurtle Turtle <yurtle_t@xxxxxxxxx>
> To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
> Sent: Tuesday, March 18, 2014 4:21 AM
> Subject: Re: [TCML] I think I fixed it ;^)
>
>
> Good to hear. Are you using the treadmill motor discussed a while back?
>
>
>
>
> ________________________________
> From: David Rieben <drieben@xxxxxxx>
> To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
> Sent: Monday, March 17, 2014 10:30 PM
> Subject: [TCML] I think I fixed it ;^)
>
>
> Hi all,
>
> For those of you who remember my "help please" thread, about my Green
> Monster Tesla coil suddenly seeming to have developed an appetite for the
> FWB rectifier for the ARSG motor, I think I have fixed the problem (keeping
> my fingers crossed). I tried mounting the FWB "brick" on a flat piece of
> cop-
> per for heat sinking WITHOUT grounding the external metal case of the
> brick.
> I also installed an extra corcom line filter upstream of the FWB and in-
> stalled a 20 amp button circuit breaker upstream of the RSG control
> variac, so as to not engulf it in flames in case of another FWB going
> dead short. I wheeled her out tonight and I ran her for a good minute
> or so without a hitch (it was smoking the FWB rectifiers within seconds
> before making the "corrections"). I was still a bit "gun shy" to really let
> her rock tonight but was able to determine that I had obviously cor-
> rected the rectifier eating problem. Thanks for the helpful suggestions to
> all who responded to my "plea".
>
> David Rieben
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