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Re: Idea- Collect Coil Data from List & make a database?
From: Barton B. Anderson[SMTP:mopar-at-mn.uswest-dot-net]
Sent: Thursday, November 20, 1997 9:38 PM
To: Tesla List
Subject: Re: Idea- Collect Coil Data from List & make a database?
Adam,
"If you built it, they will come". It's a great idea and one which is long
over due. If you do decide to attempt such a database, let us know. I'm sure
several of us would participate and find it very useful.
Bart Anderson
Tesla List wrote:
> From: Adam[SMTP:absmith-at-tiac-dot-net]
> Sent: Tuesday, November 18, 1997 11:10 PM
> To: tesla list
> Subject: Idea- Collect Coil Data from List & make a database?
>
> Here's a question/idea: Has this list ever been surveyed to collect
> experimental data? I have been to a few web pages, like that of Charles
> Brush, and the very specific nature of the data and construction details
> contained within these pages has been very helpful to me in building my
> coils. For example, when I was deciding on what H/D ratio was right for
> my 8" coil, I examined existing coils, quite a few of them!
>
> I could set up a web site, with a form for entering data. Data collected
> could include just about every aspect of a coil system, from power supply
> to toroid to gap settings and chokes, etc.. Every piece of each coil
> could be a subcategory, with different parameters to enter into the form.
> For example, the format for a secondary coil of a normal 1/4 wave system
> might have these parameters (example data given is from my latest coil):
>
> SECONDARY COIL FORM:
>
> Coil Form Height (inches): 29"
> Coil Form O.D. (inches): 8.250"
> Coil Form Shape: Cylindrical
> Coil Form Material: 8" i.d. sonotube cardboard
> Coil Form Pre Treatment: 6 thin coats of Behr Clear Gloss
> polyurethane
> Coil Form Cost & Supplier: $4.25 -at- Home Depot, Bear Rd. Waltham, MA
> +$4.50/pt Behr Clear Gloss PU
>
> SECONDARY COIL:
>
> Wire type: #20 Formvar magnet wire (5lb spool)
> Length of Windings: 25.125"
> Winding geometry: close wound linear.
> Number of Turns: 725t
> Calculated self inductance: 31mH
> Measures self inductance: <not yet measured>
> Calculated self capacitance: 12pF
> Measured self capacitance: <not yet measured>
> Calculated Fc: 260kHz
> Measured Fc: <not yet measured>
> Coil Protective Coating 6 HEAVY coats of Behr Clear gloss
> polyurethane
> Wire Cost and Supplier: <I can't remember>
>
> I have intentionally omitted figures that can be calculated from this
> basic data by simple geometric relationships- for example, I used 1570
> feet of wire, which is my coil diameter (given) times Pi times the number
> of turns (given), so I do not need to take this data. Also, are there
> any parameters I may have left out? Before I make a web page, I will post
> the proposed form of the survey to this list for member approval and so
> that contributions can be made to the list of parameters.
>
> With listmember cooperation, I could build a HUGE data base with hundreds
> of definining parameters for actual working coil systems, along with
> records of their final spark output. Basically, I would do all the
> preparation work for the survey, and it should only take members a few
> minutes to fill out the form, and the results would be of incredible
> usefulness to all who coil (At least I think so).
>
> Does this seem like too much work for members to enter their data, or is
> it a good idea? Flames and feedback to: absmith-at-tiac-dot-net or this list :-)
>
> -Adam
>
> --------------------------------------------------------------------------
> Adam Smith
> absmith-at-tiac-dot-net
> Epoch, Inc. Digital Music Project
>
> www.tiac-dot-net/users/absmith/ Now with MP3! Musik. Macht. Macintosh.
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