Mike Mertinooke wrote:
How would you classify Litz wire?
I'd classify Litz wire as off topic. It has a bandwidth of about 10 MHz (as
the text books say... the proof will be left to the reader). The low
bandwidth makes it poor for pulses and it doesn't handle high current surges
well either. It's expensive and takes special training to utilize. Other than
that, how was your evening Mrs. Lincoln?
Fred Townsend
DC to Light
Fred Townsend wrote:
Is this right?
Not necessarily. Braid may or may not be hollow. Look at the
braid
frequently used for the battery ground lead on automobiles. Braid is
frequently used for bonding large metals parts such as engine to body on your
car.
The ribbon referenced here is a single conductor. Sometimes I
make them from
sheets of copper or brass. They are not normally used where the environment
contains motion or vibration. However they are ideal for making a mobius loop
to non inductively feed the cathode of a high power transmitting tube.
The term ribbon is not distinct and may include braided ribbons.
[email protected] wrote:
It is my understanding that the following terms apply.
If not, please
elaborate/correct.
Braid - bare small gauge wires woven into a general
hollow tube shape,
intended to be used as shielding
Ribbon - flat shape, multiple conductors insulated from
each other, solid
or [7? wires bare fibre wires?] to make each conductor.
Solid Ribbon - flat shape, multiple conductors
insulated from each other,
solid wire conductors.
Is this right?
Robert
Brian:
I include braid in the category of ribbon
without distinction. However
braid is superior to solid ribbon for most
applications because it is
easier to work with. i.e. when connecting braid
to a screw terminal I
spread the braid out and slip the screw between
(with flat or star
washer) strands. It also has lower skin effect
at RF frequencies. Solid
ribbon must be crimped, drilled, or punched for
screw terminals. The
exception is solid ribbon is superior when
using mobius loops.
Silver braid is superior for RF but needs to be
protected from corrosion
to stay effective. I use ordinary tined braid
for pulse generators.
Regards,
Fred Townsend
Brian O'Connell wrote:
For this particular application, how
does the ribbon stuff compares to
braided ground straps?
I am about to build something similar,
and would like to know if someone
has already experimented with this.
thanks,
Brian
-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of Fred
Townsend
Sent: Wednesday, November 04, 2009
10:36 AM
To: [email protected]
Cc: [email protected];
[email protected]
Subject: Re: [PSES] Discharge capacitors
Derek : I think Orin offers good
advice. You also need to pay attention
to your network geometry. i.e.
Inductance is your enemy. Two 10 uF caps
in parallel are better than one 20 uF.
Straight runs of ribbon wire are
better than coils of round wire.
Regards,
Fred Townsend
DC to Light
[email protected] wrote:
The usual suspects are NWL in North
Carolina, CSI in California, and
General Atomics (formerly Maxwell).
They all know what they are doing
and have low inductance pulse rated
caps capable of multi-kiloamp
discharge peaks.
Orin Laney / Atwood Research
On Wed, 4 Nov 2009 11:04:51 -0500
[email protected] writes:
Good morning folks,
I have been working on improving the
quality of my lightning simulator
and have come to the conclusion that I
need better capacitors.
Can anyone share their opinions on
manufacturers and/or models that are
appropriate.
An offline response may be appropriate.
Sincerely,
Derek Walton
L F Research
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