[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [TCML] My Hemisphere/Toroid with Unconnected Top Sphere results
Hi Bart, Peter,
One characteristic that I have noticed in the past using spherical toploads
is the "single channel" power arc that often tends to form from the topside
of a spherically shaped topload. This may expain the "longer" arcs that
you are getting with the sphere in place over the more standard torus
shaped topload, Peter. The ionized power arc channel would lend itself
to longer discharges with the same power throughput. Just a thought.
David Rieben
----- Original Message -----
From: "bartb" <bartb@xxxxxxxxxxxxxxxx>
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Sent: Saturday, September 12, 2009 4:40:47 PM GMT -06:00 US/Canada Central
Subject: Re: [TCML] My Hemisphere/Toroid with Unconnected Top Sphere results
Hi Peter,
It's not really in-depth but rather just stating some factual
information to be aware of. Regarding the output, that is fun and
interesting. I remember the first video that showed the streamer off the
top sphere coalesce into a single channel spark which flowed smoothly.
That can certainly occur on nice smooth surfaces and there is also the
ionization field that occurs around the sphere.
Interesting is your output with sphere connected versus not connected.
The main difference I see there is the unconnected sphere becomes
charged over time. When the two top load objects finally do breakdown,
this potential is introduced to the now combined top load. Possibly a DC
component is manufactured at the sphere and is providing sort of a
"bite" to the sparks. Certainly interesting.
Take care,
Bart
Peter Baitz wrote:
> Hi Bart,
>
> Thank you for this in-depth explanation, definitely not info I came across before, and that does make a great deal of sense and does explain why adding the top sphere would not throw off tuning the hemi/toroid.
>
> However, what still remains is with the top sphere directly connected I do not get the same power output (streamer lengths) as with it unconnected/isolated on top, or with one of the wire coil setups I have been testing which get much more power output out of it. It seems to me the coil connecting the top sphere and hemisphere act as a tesla magnifier of sorts, often pumping the hemisphere/toroid output, and sometimes the sphere breaks out. I posted an additional picture of tonight's coil session and result with a double-coil tertiary coil setup.
>
> Video: http://www.youtube.com/watch?v=mFx4CxsgBjs
> Website with pics:
> http://www.freewebtown.com/baitzobservatory/tesla/index.html
>
> Thanks again for that great info and explanation.
>
> Peter
>
>
>
>
>
>>>> ------------------------------
>>>>
> I understand what you are saying, but the data is incorrect. The sphere
> + hemisphere/toroid does not add (as though you add the single
> capacitance of both). You really need a program that looks at the
> effective combined capacitance in situ from ground plane to top load
> objects, coil to top load objects, object to object, etc.
> For example, a 4" x 20" toroid (by itself) raised 50" above the ground
> plane = 22.8pF
> Stack a 2nd toroid of the same size resting on top of the first = 26.7pF
> If we raise the 2nd toroid up to a 60" height, C increases = 30.8pF
>
> When these top load objects are stacked on top of a coil, the effective
> top load capacitance changes again as the secondary coil and primary
> coil are then in situ of the objects.
> In your case, the sphere will only add about 2pF of C when placed on the
> hemisphere/toroid and will only change Fr a few kHz (about 20kHz with
> your particular coil). Stacking odd shaped top load objects is something
> many of us have done many times over many years and we've made plenty of
> measurements to see the effects.
> If you have a generator and scope, you should measure the change in Fr.
> Playing with top loads is always fun to do, but it sure is nice to take
> a measured Fr reading as it tells the tale.
>
> Best regards,
> Bart B. Anderson
>
>>>> ----------------------------------------
>>>>
>
>
>
>
>
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxxxxxx
> http://www.pupman.com/mailman/listinfo/tesla
>
>
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla