Electronics Forum / Electrical Engineering / March 2004

Possibility of getting electrical energy from the rotation of the Earth
through its own magnetic field.
The homopolar generator has a conducting disc rotating along with an axially
mounted cylinder magnet; the disc is cemented near the pole of the magnet.

Any you using Lindows?  I have been researching it and it looks darn good.
I have one question though.  The Lindows word processor will read .doc files
and the Lindows Spreadstheet will read .xls files, but will they write these
files so the Microsoft programs will read them?

Chalk And Cheese - A Few Further Thoughts On Impulses
When studying the mathematics associated with DSP,
one encounters time and again a mathematical
equation from which the deduction could be made

I just seen where Cinergy now has BPL (broadband over powerlines), and
they are going too start offering it too their Ohio customers. I was
wondering if anyone is familar with this technology? What are the
bandwidth limitations? How will the signal get past the transformer?

If installing an outdoor receptacle that is 125 feet from the breaker box
with a 20amp breaker, would 12 gauge wire be sufficient or would the voltage
drop be to much?
Thx

Normally the neutral in a 1 phase 240/120 volt system will be bonded to
the grounding conductor and connected to an earth ground electrode at
the electrical service entrance to a building.  But when the building
is supplied by a branch circuit from another building (via underground

what is the attraction of three-phase power?    Why not 9 0r 317
phases?  Why not plain ole hot & neutral?

Background Scenario:
Part 1) New house with 12-2 romex wiring installed by an electrician who
often justified sloppy work with faulty assumptions.  Regarding skimpy
use of staples:  "Them wires ain't going nowhere near the drywall screws

We have several contactor type switches that have burned contacts.  The
electrician tells us we have to replace the complete unit since the points
are no longer available.
The units are Siemens.  Is there a fix or parts source that handles older

I need some help from you guys. I am looking for some resources regarding
differences between industrial grade servers and severs commonly used by IT.
I googled, but found mostly manufacturers stuff. I would be rather looking
for some independent study, reliability numbers...?

I have 2 x 120 Kva UPS ( 3 phase 400V ) supplying a computer room to provide
me with n + 1 in event of a power failure. However the load is now 100 Kva
but we have a problem with leading the power factor. I cannot put a big
motor on the UPS to correct it. Does anyone know of any ...

Suppose you could go back in time to when things are being decided,
wherever and whenever that might happen to be, and have influence or
even complete control over the decision(s), what would decide for the
standard voltage(s) used for distributing electrical power service to

Is any one reading this message know more about ultrawideband technology. I
am a undergrad student at RPI, Ny and wanted to do research on UWB, but not
sure where to start from?
Please help if you can...any suggestions will be appreciated...

I have an inverter that outputs a 0 to 20 mA signal in proportion to the
speed.
I need a 4 to 20 mA signal. Can the 0/20 be converted somehow?
TIA

anyone got a copy on cd ..is it possible to get it on cd the updated version
amd 2 ??