Another new surge protector/filter

Hi all,

A while ago I posted a comparison of the filtering capabilities of all
the power strips I had lying around my house.  The comparison was based
on the Stetzerizer and Entech plug-in meters.

The results of that was that the Furman PST-8/10 had the best reduction
in noise, with some others (e.g. Brickwall) not being too far behind.

I had intended on bringing a Furman/Brickwall filter into my workplace,
which I was sure had much worse noise than my house has, but never did
this because these things were too large to bring in unnoticed by my
coworkers.  :-)

However, I recently found a smaller model that tests about as well as
the Brickwall (but not as good as the Furman) -- the SurgeX SA82:

  http://www.surgex.com/products/sa82FlatPak.html

The manufacturer specs on this are:

  EMI/RFI Filter, Normal Mode (50-ohm load): 40 dB @ 100 kHz; 50 dB @
  300 kHz; 50 dB @ 3 MHz; 50 dB @ 30 MHz

  EMI/RFI Filter, Common Mode (50-ohm load): 18 dB @ 300 kHz; 30 dB @ 1
  MHz; 50 dB @ 5 MHz; 50 dB @ 20 MHz

I brought this into work, and checked it with the Stetzerizer meter.  
The readings on an unprotected outlet were about 1000 (!).  The readings
coming out of this power strip were 150.  So I've got my computer and
monitor plugged into this now.  I can't say for sure at this point if
it's making any difference in my symptoms...

Marc

Hello Marc,

the Stetzer filters should work between 5 kHz and 100-150 kHz (as the dutch importer points out).
However, the Bajog Alpha 5 B filters do filter from 5 kHz up to 30 MHz.

The Stezerizer meter only measures up to 200 kHz, where the Entach meter goes up to 800 kHz.

With my Spectran NF 5035, I can see peaks from 1 Hz up to 30 MHz.

Bajog is in the proces of offering a special meter up to 30 MHz.

Greetings,
Charles Claessens
member Verband Baubiologie
www.milieuziektes.nl
www.milieuziektes.be
www.hetbitje.nl
checked by Norton

  ----- Original Message -----
  From: Marc Martin
  To: [hidden email]
  Sent: Friday, October 29, 2010 6:29 PM
  Subject: [eSens] Another new surge protector/filter


  Hi all,

  A while ago I posted a comparison of the filtering capabilities of all
  the power strips I had lying around my house.  The comparison was based
  on the Stetzerizer and Entech plug-in meters.

  The results of that was that the Furman PST-8/10 had the best reduction
  in noise, with some others (e.g. Brickwall) not being too far behind.

  I had intended on bringing a Furman/Brickwall filter into my workplace,
  which I was sure had much worse noise than my house has, but never did
  this because these things were too large to bring in unnoticed by my
  coworkers.  :-)

  However, I recently found a smaller model that tests about as well as
  the Brickwall (but not as good as the Furman) -- the SurgeX SA82:

    http://www.surgex.com/products/sa82FlatPak.html

  The manufacturer specs on this are:

    EMI/RFI Filter, Normal Mode (50-ohm load): 40 dB @ 100 kHz; 50 dB @
    300 kHz; 50 dB @ 3 MHz; 50 dB @ 30 MHz

    EMI/RFI Filter, Common Mode (50-ohm load): 18 dB @ 300 kHz; 30 dB @ 1
    MHz; 50 dB @ 5 MHz; 50 dB @ 20 MHz

  I brought this into work, and checked it with the Stetzerizer meter.  
  The readings on an unprotected outlet were about 1000 (!).  The readings
  coming out of this power strip were 150.  So I've got my computer and
  monitor plugged into this now.  I can't say for sure at this point if
  it's making any difference in my symptoms...

  Marc


  ------------------------------------

  Yahoo! Groups Links





[Non-text portions of this message have been removed]

Thanks for the info. I'm thinking of getting a Furman to replace my battery back up
Steve

--- In [hidden email], "Marc Martin" <marc@...> wrote:

If you want it to protect you from dirty power from others in
your office you want common mode rejection down to 50kHz or
so, which it doesn't look like this has.  But probably your own
computer is the main problem, and all this does is reduce (slightly)
the emfs others (without computers) would get.

I am experimenting with making a common mode choke.

See page 22 of this:
http://www..audiosystemsgroup.com/RFI-Ham.pdf

Other pages good too.

Bill

On Fri, Oct 29, 2010 at 10:29 AM, Marc Martin <[hidden email]> wrote:


[Non-text portions of this message have been removed]



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