Re: secondary wire diameter

["Tesla list" <tesla@xxxxxxxxxx>]

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

Hi Dmitry,

Congradulations on building your first coil.  The contemporary 
thinking is to have a H/D ratio of between 4:1 and 5:1.  Choose the 
height appropriately for the spark length you are planning on, then 
choose the wire guage to get 1200-1500 turns.  None of this is too critical.

Gerry R

> Original poster: "Dmitry (father dest)" <dest@xxxxxxxxxxx>
>
> hello all.
>
> how do you choose secondary wire diameter?
> imagine we have a certain secondary coil form, coil winding lenght -
> 1m. it`s known - "the more inductance - the better" - ok, but at very
> high number of turns the Q of the coil is decreasing. what minimum Q
> value could we use on practice?
> while my proto secondary working in 3:4 mode and Q=382, losses are
> 1.5%, at Q=100 they are 5.6%, at Q=50 - 11% (calculations results from
> Antonio`s "optesla"). as i`m going to choose minimum wire diameter,
> you may forget about skin-effect.
>
> how does the power of the coil is connected with the wire diameter -
> for example, what wire should we use at 2-4kw? is it useful to wind
> the bottom of the secondary by more thick wire as the main current flows
> only there?
>
> p.s.
> i`ve found the source of PE pipes with 10-300mm diameter and wall
> thickness of 2-28mm, but it`s LDPE - could i make the coil from it?