Re: Solid versus stranded Wire
Tesla List wrote:
> Original Poster: "Malcolm Watts" <malcolm.watts-at-wnp.ac.nz>
> On 17 May 00, at 4:54, Tesla List wrote:
> > Original Poster: "G. G. Ford" <swimp-at-home-dot-com>
> > About at TC Freqs, Solid better than Stranded wire...
> > Is that because of the higher intrinsic inductance
> > of smaller diameter wire, causing increased voltage
> > drop?!
> No - inductance is lossless.
First of all, Inductance can RADIATE
and it can interact with ferromagnetic
materials to produce hysteresis loss..
That is a Loss.
When resistence (as it always) is present,
by changing the power factor,
(I^2)*R losses can be effected.
Anyway, I was thinking about Voltage Drop,
not Power Loss!...Unless maybe I
expressed myself sloppily.
Strange that no one commented on the
fact that smaller diameter [straight] wires
have higher intrinsic inductance than
larger diameter [straight] wires...
This is not to be confused with the loop
inductance in coils...
> We are talking about losses and
> therefore resistance. All else being equal, stranded wire is
> measureably lossier than solid section, presumably due to skin
> effect artifacts. I have measured this in quite short lengths of wire.
> Area for area, litz is better than both as it has a greater effective
> cross sectional area due to the insulation between strands. I am not
> saying that a resonator built with stranded wire will produce inferior
> results however - primary losses and output spark losses are
The 'artifacts' you refer to may in fact be
due to the inductance effect I mentioned...
important for RF.
http://members.home-dot-net/swimp/ - click 'Plasma'
for photos of a plasma jet  injecting into air...
> > Swimp-at-home-dot-com
> > http://members.home-dot-net/swimp/ - click Plasma
> > for photos of a a hypersonic plasma jet...
> > Tesla List wrote:
> > > > Original Poster: MrDirect-at-aol-dot-com > ...would there be more or less
> > > drop
> > > > using stranded wire or solid wire?
> > >
> > > If the copper is the same grade and the cross-sectional area of the
> > > copper is the same there shouldn't be any difference. Things
> > > change noticeably at TC type frequencies though. Solid is a better
> > > performer.
> > >
> > > Regards,
> > > Malcolm
> > >
> > > > Regards
> > > >
> > > > Dave