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Re: Secondary Question



Original poster: "Barton B. Anderson" <bartb@xxxxxxxxxxxxxxxx>

Hi Rich,

I've been keeping up with you and Gerry on this coil. It's kind of interesting to see what choice a coiler makes (as per Gerry's options - which were perfectly presented and correct). I'm kind of curious as to your red wire. Is it stranded wire? If so, I would probably make the same choice of using magnet wire. On large forms say 10-12 inch diameter, I prefer 18 awg.

If by chance your red wire is a single solid conductor, then there would be nothing wrong with 1000 turn coil on a 9" x 50" form for a 5.56:1 h/d ratio, assuming the overall diameter is 0.05". Turns are decent as is the h/d ratio.

Take care,
Bart

Tesla list wrote:

Original poster: "Rich" <rdjmgmt@xxxxxxxxxx>

Well due to the fact that the cover on the silver plated wire is bright
red I thought a "red monster" would be nice for a start but I never
expected it to be as good as the southern "green monster" of this list.
With lack of power for going bigger I think I might leave my 9" mailing
tube on the shelf and go with magnet wire and 6" PVC. With PVC it will
be easier to build in an adjustable height mount so the distance from
the primary to secondary can be controlled. I have already sold my big
Maxwell (.150mF 100Kv) to the man with the green monster and don't think
I want to get into a pole pig at this time. I might find some one who
needs the red wire. I have enough magnet wire for 6" PVC.

Rich

Subject: Re: Secondary Question

Original poster: "Gerry  Reynolds" <gerryreynolds@xxxxxxxxxxxxx>

Hi Rich,

Most people use magnet wire for their secondaries and choose the
gauge give the desired number of turns within the allocated
space.  Since you already have your wire and if you want to use it,
you will have to decide what to compromise.  Some choices are:

a) increase the diameter to 14 inches (probably too big for your power
level
b) use less than 1400 turns to fit what ever height you decide upon
(probably between 45 and 70 inches)
c) go with a non standard aspect ratio 9x70 (increase the impedance
of your resonator)
d) choose an appropriate gauged magnet wire.

Almost anything will work.  Barring choice d), I would probably use
choice b) and a 54 inch wiring height.  This would give you 1080
turns.  Please keep in mind that being exact on a 4.5:1 aspect ratio
and 1400 turns is not that critical.  Things will perform well over a
broad range.

Gerry R.

>Original poster: "Rich" <rdjmgmt@xxxxxxxxxx>
>
>Subject: RE: Secondary Question
>
>Original poster: "Rich" <rdjmgmt@xxxxxxxxxx>
>
>Thank you for the reply Gerry and Scot, now I am going slow with this
>because I read where the Cp for my transformer was 30nf and I thought I
>should make it 30 , now you say 49nf. I planed on a order of 52 caps ,
I
>can get a few more and run 4 strings and get close to 49.
>Wire , yes I have a large wooden spool of the silver plated stranded
>wire. With 1400 turns per you note and my wire .05 with insulation that
>gives me 9"dis x 70" tall. Won't that get out of the normal
proportions?