Re: primary coil material / design

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: FutureT@xxxxxxx 

In a message dated 10/5/06 11:41:08 PM Eastern Daylight Time, 
tesla@xxxxxxxxxx writes:

John,

My TT-42 coil, and my old research coil both used wire rather
than copper tubing.  The TT-42 uses solid 10awg insulated telephone
ground wire.  The research coil used fine stranded 12awg PVC
insulated wire.  Both were close wound.  Works fine for a small
coil.  Because modern coils usually use a large number of turns
in the secondary, they also need more turns in the primary.
This reduces the peak primary currents and permits a thinner
conductor to be used.

   http://hometown.aol.com/futuret/page3.html

John



> Original poster: John <guipenguin@xxxxxxxxx>
>
> Hello I am in the middle of building my first coil. I am going to be
> using a 4" diameter for the increased inductance.
>
> I see everyone uses copper refrigerator tubing.... but is there any
> reason (Besides being hard to tune!) to use something like this:
> <http://img82.imageshack.us/my.php?image=dcfc0002ud6.jpg>http://img82.imageshack.us/my.php?image=dcfc0002ud6.jpg
>
> I made that test coil just for this email, it isn't enough turns, but
> its just for demo. Why would this be a bad choice?
>
>
> Thanks,
>
>    John.