I'm glad we sorted this out. Good job sir.
On Thu, Mar 31, 2016 at 3:43 AM, Teslalabor <teslalabor@xxxxxxxxxxx> wrote:
> So, everything seems to be fine! The yellow transformers are ballancing
> chokes. I first suspected a completely different mode of operation in a way
> more complex way (as my unit was built like I was talking about), but
> indeed the 2 x 3 variac stack in this staco system seems to be made for
> 75kVA.
>
> ----- Original Message ----- From: "Chris Boden" <cboden@xxxxxxxxxxxxxxxx>
> To: "Thomas Shurtz" <whompin105@xxxxxxxxx>; "Tesla Coil Mailing List" <
> tesla@xxxxxxxxxx>
> Sent: Thursday, March 31, 2016 3:24 AM
>
> Subject: Re: [TCML] Giant Variac For Sale
>
>
> Video! Data! Peer Review!
>> https://youtu.be/XrOZ-jKXr8o
>>
>> On Wed, Mar 30, 2016 at 1:18 PM, Chris Boden <cboden@xxxxxxxxxxxxxxxx>
>> wrote:
>>
>> I think you're the closest to correct in this, and I'm genuinely curious
>>> to figure out just what we've got going on here. This is bugging me. I'm
>>> going to get up-close detailed video of the unit and put it in the
>>> Captain's Blog so that we can all peer review it and figure out just what
>>> this has going on. I figured out what my fundamental error was though.
>>> These are a 208-3ph setup so the variacs are at 120VAC or so. I was
>>> comparing them to the 9 stack triple-triple we have and those are 480VAC.
>>> Of course the kVA was off, the voltage makes a huge difference, and I'm
>>> an
>>> idiot.
>>>
>>> So, video, data, let's work it through and figure out exactly what we've
>>> got here so that we can put a FAIR price on it. Because as it sits, I
>>> think
>>> I'm overcharging.
>>>
>>> Of course if you're working with 120VAC Variacs and thinking with a
>>> 480VAC
>>> mentality....overcharging is going to be the first problem you have.
>>>
>>>
>>>
>>> On Wed, Mar 30, 2016 at 12:25 PM, Thomas Shurtz via Tesla <
>>> tesla@xxxxxxxxxx> wrote:
>>>
>>> It has been interesting to watch this little exchange on the list. I'm
>>>> not going to assume that Chris is trying to mislead anyone, but the
>>>> point
>>>> here is that he is advertising a 6-gang variac that comes with some
>>>> other
>>>> goodies that one may or may not be interested in ("who cares?" was the
>>>> wording used). If it's a variac stack you are trying to sell, then it's
>>>> probably prudent to include the specs for the variac rather than the
>>>> specs
>>>> of the "who cares" unit which it's a component of. We might be able to
>>>> make some assumptions about the variac specs- Staco 5011 series auto
>>>> transformers come with a 50 amp fuse they are for 120v input and rated
>>>> at
>>>> 7kVA each. The variac stack isn't fused at 50 Amps, so teslalabor's
>>>> analysis isn't quite right, but neither is the 75kVA claim made by
>>>> Chris.
>>>> If you can provide some physical measurements of the autotransformers or
>>>> check the top of the stack for a nameplate and provide that info, you
>>>> might
>>>> get more success selling this as a variac stack stuck inside of a "who
>>>> cares" voltage regulator. BTW - Staco has a part number for the
>>>> variable
>>>> transformer listed in the user manual for the voltage regulator
>>>> (033-7581)
>>>> but this number doesn't match the part number (031-6954) on the drawing
>>>> for
>>>> the 6stack wye configured set of 5011's that I looked at, so that may
>>>> mean
>>>> it isn't really made up of 5011's or it could be that it's configured a
>>>> bit
>>>> differently for this application and given a unique part number. Best
>>>> of
>>>> luck with the sale.
>>>> Thomas
>>>> From: Teslalabor <teslalabor@xxxxxxxxxxx>
>>>> To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
>>>> Sent: Wednesday, March 30, 2016 10:04 AM
>>>> Subject: Re: [TCML] Giant Variac For Sale
>>>>
>>>> 75kVA says the makerplate of what? I only can see a photo of the
>>>> makerplate
>>>> of the whole unit, which says it is 75kVA.
>>>>
>>>> Makerplate says 75kVA, 208Volts @ 208Amps, so: 208 Volts * 208/sqrt(3)
>>>> Amps
>>>> * 3 = 75kVA
>>>>
>>>> The variac is fused with 50Amps, you say. That is a maximum power of
>>>> 18kVA
>>>> for the variacs, what makes completely sense to me (maybe even only 9kVA
>>>> for
>>>> each of the 2 stacks). They are only for controlling the main
>>>> transformer,
>>>> and that beast is rated at 75kVA not the little variacs, thats the
>>>> thing I
>>>> am trying to explain to you.
>>>>
>>>>
>>>>
>>>> ----- Original Message -----
>>>> From: "Chris Boden" <cboden@xxxxxxxxxxxxxxxx>
>>>> To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
>>>> Sent: Wednesday, March 30, 2016 1:50 AM
>>>> Subject: Re: [TCML] Giant Variac For Sale
>>>>
>>>>
>>>> > Each coil of this variac is fused at 50A, what was yours at? The
>>>> > makerplate
>>>> > says 75kVA, and it's Staco....I believe them.
>>>> >
>>>> > On Tue, Mar 29, 2016 at 1:08 PM, Teslalabor <teslalabor@xxxxxxxxxxx>
>>>> > wrote:
>>>> >
>>>> >> :-)))) Very funny. Yes, the small potentiometer knob is used to
>>>> fine-tune
>>>> >> the regulation range, with this you only can change the output >>
>>>> voltage
>>>> in
>>>> >> a
>>>> >> range of lets say 200-216 Volts.
>>>> >> I know this because I bought exactly such an unit like yours some >>
>>>> years
>>>> >> ago for a big pile of money. I also thought "wow, very cool >>
>>>> variac..."
>>>> >> The end of the story was, that there was only a very small (3-phase)
>>>> >> variac with some kVA's inside, which (when I remember corectly)
>>>> >> controlled
>>>> >> in combination with another (small) 3 phase transformer the VERY big
>>>> >> 3-phase load-transformer inside the housing. BTW, please don't ask
>>>> >> me,
>>>> >> how
>>>> >> this works...
>>>> >> I could be wrong but I'm pretty sure that your unit works in the same
>>>> >> way... At least you should take this into consideration instead of
>>>> >> only
>>>> >> rely on size-comparisons with another variacs.
>>>> >>
>>>> >> ----- Original Message ----- From: "Chris Boden"
>>>> >> <cboden@xxxxxxxxxxxxxxxx>
>>>> >> To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
>>>> >> Sent: Tuesday, March 29, 2016 6:06 PM
>>>> >>
>>>> >> Subject: Re: [TCML] Giant Variac For Sale
>>>> >>
>>>> >>
>>>> >> The output is adjustable (it's the little knob under the meter) and
>>>> has a
>>>> >>> considerable range. I don't know it's full range as I haven't tested
>>>> >>> this
>>>> >>> unit. We got them for the stacks, and then leapfrogged past them in
>>>> our
>>>> >>> upgrade cycle in building the new lab. That's why we're selling >>>
>>>> these.
>>>> >>>
>>>> >>> The variac, pulled from the cabinet, will actually handle a 75kVA
>>>> >>> load
>>>> >>> just fine. I know this because it's a slightly smaller version of
>>>> >>> the
>>>> >>> one
>>>> >>> I
>>>> >>> use every day in our High Voltage lab as our main power supply. >>>
>>>> There
>>>> >>> are
>>>> >>> dozens, if not hundreds of videos of my demonstrating it's use in
>>>> front
>>>> >>> of
>>>> >>> thousands of people. You yourself are welcome to come here and >>>
>>>> measure
>>>> >>> the
>>>> >>> output capacity and compare it yourself. Of course I suggest you
>>>> bring a
>>>> >>> NIST traceable, calibrated measurement set. If you wish to do this,
>>>> >>> I
>>>> >>> would
>>>> >>> be happy to provide a complete camera crew and live audience to
>>>> publish
>>>> >>> your results if you have any doubt as to the veracity of my claims.
>>>> >>>
>>>> >>> It's only a voltage regulator if you keep it intact and use it as
>>>> such.
>>>> >>> Anyone interested on here would likely autopsy it for its component
>>>> >>> pieces.
>>>> >>> The transformer inside, aside from being "damn big" I know nothing
>>>> >>> about.
>>>> >>> Though it would make one hell of a boat anchor or a great core for a
>>>> >>> reactive ballast.
>>>> >>>
>>>> >>>
>>>> >>> On Tue, Mar 29, 2016 at 11:25 AM, Teslalabor >>> <
>>>> teslalabor@xxxxxxxxxxx>
>>>> >>> wrote:
>>>> >>>
>>>> >>> Okay! I was little bit confused because of the additional "large
>>>> >>>> transformer" you mentioned. What I was talking about, are units
>>>> similar
>>>> >>>> to
>>>> >>>> yours, used for automatic "voltage stabilisation". They >>>>
>>>> automatically
>>>> >>>> adjust line voltage within a range of +/- some percent. These units
>>>> >>>> consist
>>>> >>>> of small variacs + big transformer, which takes the load.
>>>> >>>> But anyway, you should check the namplate carefully. It says INPUT
>>>> >>>> is
>>>> >>>> 166-229 Volts and OUTPUT is fixed at 208 / 120 Volts.
>>>> >>>> So this means, this unit can NOT regulate Voltage between 0 - 208
>>>> >>>> Volts!
>>>> >>>> Is stabilizes the Output Voltage @ 208 Volts, whereas Input voltage
>>>> can
>>>> >>>> be
>>>> >>>> anything between 166-229 Volts.
>>>> >>>> So this is not a 75kVA Variac Mr. Boden...
>>>> >>>>
>>>> >>>> ----- Original Message ----- From: "Chris Boden" <
>>>> >>>> cboden@xxxxxxxxxxxxxxxx>
>>>> >>>> To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
>>>> >>>> Sent: Tuesday, March 29, 2016 4:39 PM
>>>> >>>> Subject: Re: [TCML] Giant Variac For Sale
>>>> >>>>
>>>> >>>>
>>>> >>>>
>>>> >>>> If you check the pics, this is not a small variac. ;) It's a >>>>
>>>> 6-stack
>>>> >>>>
>>>> >>>>> (triple-double) of the standard big toroids with balancing chokes.
>>>> >>>>> It's
>>>> >>>>> one
>>>> >>>>> size smaller than our 100kVA variac and will certainly handle the
>>>> >>>>> load.
>>>> >>>>> Check the pics, the stack fills up half of that cabinet.
>>>> >>>>>
>>>> >>>>> On Tue, Mar 29, 2016 at 3:45 AM, Teslalabor >>>>> <
>>>> teslalabor@xxxxxxxxxxx
>>>> >
>>>> >>>>> wrote:
>>>> >>>>>
>>>> >>>>> Nice! I also had such an big automatic voltage regulator some time
>>>> >>>>> ago.
>>>> >>>>>
>>>> >>>>>> "Problem" is: I don't remember how it works but the variac itself
>>>> >>>>>> (which
>>>> >>>>>> would be interesting for TC use) is only a relatively small one,
>>>> >>>>>> maybe
>>>> >>>>>> 10kVA or less. The main power (75kVA in your case) comes from the
>>>> big
>>>> >>>>>> standard 3-phase transformer, which is controlled via the small
>>>> >>>>>> variac
>>>> >>>>>> +
>>>> >>>>>> controll transformer.
>>>> >>>>>> Maybe you should add an info to your auction, that this is NOT a
>>>> >>>>>> 75kVA
>>>> >>>>>> variac, this could lead to some confusion and you could get some
>>>> >>>>>> trouble
>>>> >>>>>> otherwise :-)
>>>> >>>>>>
>>>> >>>>>>
>>>> >>>>>> ----- Original Message ----- From: "Chris Boden" <
>>>> >>>>>> cboden@xxxxxxxxxxxxxxxx>
>>>> >>>>>> To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
>>>> >>>>>> Sent: Tuesday, March 29, 2016 1:21 AM
>>>> >>>>>> Subject: [TCML] Giant Variac For Sale
>>>> >>>>>>
>>>> >>>>>>
>>>> >>>>>> If anyone is interested in a massive 6-stack variac, we have one
>>>> for
>>>> >>>>>> sale.
>>>> >>>>>>
>>>> >>>>>> http://www.ebay.com/itm/222067908245
>>>> >>>>>>> This happens to also include a solid cabinet with a large
>>>> >>>>>>> transformer
>>>> >>>>>>> and
>>>> >>>>>>> some control circuitry. The unit actually works, but who cares,
>>>> it's
>>>> >>>>>>> a
>>>> >>>>>>> giant 6-stack variac :)
>>>> >>>>>>>
>>>> >>>>>>> And a matching massive switch as well
>>>> >>>>>>> http://www.ebay.com/itm/-/322055321777
>>>> >>>>>>> --
>>>> >>>>>>>
>>>> >>>>>>> Chris Boden
>>>> >>>>>>> President
>>>> >>>>>>> The Geek Group National Science Center
>>>> >>>>>>> www.thegeekgroup.org
>>>> >>>>>>> We Build Awesome
>>>> >>>>>>>
>>>> >>>>>>> --
>>>> >>>>>>>
>>>> >>>>>>>
>>>> >>>>>>> This email may contain confidential and privileged material for
>>>> the
>>>> >>>>>>> sole
>>>> >>>>>>> use of the intended recipient. Any review or distribution by
>>>> others
>>>> >>>>>>> is
>>>> >>>>>>> strictly prohibited. If you are not the intended recipient
>>>> >>>>>>> please
>>>> >>>>>>> contact
>>>> >>>>>>> the sender and delete all copies.
>>>> >>>>>>>
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>>>> >>>>>>>
>>>> >>>>>>>
>>>> >>>>>>> _______________________________________________
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>>>> >>>>>>
>>>> >>>>>>
>>>> >>>>>>
>>>> >>>>>
>>>> >>>>> --
>>>> >>>>>
>>>> >>>>> Chris Boden
>>>> >>>>> President
>>>> >>>>> The Geek Group National Science Center
>>>> >>>>> www.thegeekgroup.org
>>>> >>>>> We Build Awesome
>>>> >>>>>
>>>> >>>>> --
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>>>> >>>>>
>>>> >>>>> This email may contain confidential and privileged material for
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>>>> >>>>>
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>>>> >>>>
>>>> >>>
>>>> >>>
>>>> >>> --
>>>> >>>
>>>> >>> Chris Boden
>>>> >>> President
>>>> >>> The Geek Group National Science Center
>>>> >>> www.thegeekgroup.org
>>>> >>> We Build Awesome
>>>> >>>
>>>> >>> --
>>>> >>>
>>>> >>>
>>>> >>> This email may contain confidential and privileged material for the
>>>> sole
>>>> >>> use of the intended recipient. Any review or distribution by others
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>>>> >>> strictly prohibited. If you are not the intended recipient please
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>>>> >>
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>>>> >>
>>>> >
>>>> >
>>>> >
>>>> > --
>>>> >
>>>> > Chris Boden
>>>> > President
>>>> > The Geek Group National Science Center
>>>> > www.thegeekgroup.org
>>>> > We Build Awesome
>>>> >
>>>> > --
>>>> >
>>>> >
>>>> > This email may contain confidential and privileged material for the >
>>>> sole
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>>>>
>>>
>>>
>>> --
>>>
>>> Chris Boden
>>> President
>>> The Geek Group National Science Center
>>> www.thegeekgroup.org
>>> We Build Awesome
>>>
>>>
>>
>>
>> --
>>
>> Chris Boden
>> President
>> The Geek Group National Science Center
>> www.thegeekgroup.org
>> We Build Awesome
>>
>> --
>>
>>
>> This email may contain confidential and privileged material for the sole
>> use of the intended recipient. Any review or distribution by others is
>> strictly prohibited. If you are not the intended recipient please contact
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>
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--
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President
The Geek Group National Science Center
www.thegeekgroup.org
We Build Awesome
--
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