[RFI] Power Lines

[David Robbins K1TTT]

Old and new... 

The last DC distribution station in NYC was just retired after they
installed rectifiers in the last building that it was powering.

Today High voltage DC is an excellent choice for long distance transmission
of power because of low losses at the high voltages used and also because it
eliminates AC synchronization problems.  There is in fact at least one
connection to the Mexican grid where back to back converters are used just
to separate the AC systems from each other. 


David Robbins K1TTT
e-mail: mailto:k1ttt at arrl.net
web: http://www.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net
 

> -----Original Message-----
> From: rfi-bounces at contesting.com [mailto:rfi-bounces at contesting.com] On
> Behalf Of WarrenWolff at aol.com
> Sent: Saturday, December 22, 2007 17:32
> To: n6pe at yahoo.com; rfi at contesting.com
> Subject: Re: [RFI] Power Lines
> 
> When I was quite young, there was an allegation that gardens  grew better
> under those AC lines!!
> AND, now there's DC to contend with!  Isn't change  interesting?
> 
> Warren; W7WY
> 
> 
> In a message dated 12/22/2007 10:11:55 A.M. US Mountain Standard Tim,
> n6pe at yahoo.com writes:
> 
> I  probably shouldn't admit this but........... After all the Edison/Tesla
> things  I've seen over the years and a discussion with my brother that
> worked
> for Los  Angeles Department of Water and Power, I was SHOCKED to learn
> that some
> of  their main transmission lines are actually DC. I have always assumed
> all
> the  main power lines are AC. Even studies I've seen regarding health
> issues
> from  power lines reference AC.
> 
> There is interesting reading at
> http://en.wikipedia.org/wiki/Electric_power_transmission
> 
> OK, so you  all knew this........ but it was news to me.
> 
> Rick,  N6PE
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