[GreenKeys] RF noise

Wed Apr 8 20:18:54 EDT 2009

Don 

Thanks for the re-education on the state of the global standards (yes it's an oxymoron )
I've noted the modular jack problem and contrary to popular belief -SIZE does Matter ! 
The other day I was helping a senior lady with an dial internet problem .
She had been in contact with at&t support people and they suggested she upgrade to xDSL . 
The problem is her telephone line has a 60hz ground hum and it's on the at&t side of the network interface .
One of my sons from Missouri called today to discuss an electrical problem with one of his neighbors 220vac heater . It's blown out three brain boxes and LOWES says it's a problem with that model ! 
As you know you can sign up for CPSC www.cpsc.gov/cpscpub/prerel/prerel.html -recalls and that doesn't even begin to address the many product, drugs and food safety failures.
Global Economics is changing our world and for those raised under total quality control programs this isn't easy to take.

--- On Tue, 4/7/09, Don Robert House <k9tty at dls.net> wrote:

From: Don Robert House <k9tty at dls.net>
Subject: Re: [GreenKeys] RF noise
To: "Chris Elmquist" <chrise at pobox.com>
Cc: greenkeys at mailman.qth.net
Date: Tuesday, April 7, 2009, 10:12 PM

Chris,

You are correct. Broadband Interference is getting worse.  Any one of these RF
generators
probably would not be very noticeable, but when there are so many sources it
becomes
very problematic.

In the year 2000 the FCC turned over several parts of it's requirements
including Part 15
to a separate agency.  I have forgotten the actual name and acronym but the
standards
group that overseas and contributes to this agency is ATIS.  The Alliance for
Telecom
Industry Solutions.  ATIS is a spin-off from ANSI.  It seems no one really
wants to enforce
the standards, just play with them and modify them.

These days low first cost is the prime motivation for purchasing agents. 
Quality and
reliability mean almost nothing.  You may notice that you will soon start to
have to replace
your telephone jacks every three years, especially if you are in a climate that
experiences
high humidity and damp locations like basements and kitchens.

This is because the industry depends on Chinese manufacturers to build the
lowest cost
jacks.  Part 15 requires all jacks for telephone service to be plated with no
less than
50 micro-inches of gold.  The jacks imported by Woods, RCA, and several others
are
plated with only 3 micro-inches of gold to reduce first cost.

This is only one example of the blind eye to standards.  Another is the actual
size of
wall phone jacks.  So many have been copied from others that the dimensions of
many of the jacks
you buy in the Home Depot or other stores are as much as a sixteenth of an inch
off in
more than one dimension.  Just finding the correct dimensions is no longer a
simple task.

For several years I worked with regulatory compliance as one of my engineering
tasks.
I refused to let the company lower it's specifications to not meeting
national standards.  Today
the company has lost most of the business it once had due to asian competition.
 They let go
all of the people, except one, I trained and now leave the regulatory
compliance to people in
the orient... specifically China.

The goal of purchasing should always be the highest total value, not simply the
lowest
first cost.

End of sermon.

Don
K9TTY

On 7 Apr 2009, at 11:14 AM, Chris Elmquist wrote:

My experience says this is a much wider problem than just compact
flourescent bulbs...

I get broadband hash S9+30 from the variable speed blower in my new
energy efficient furnace.  This blower motor is speed controlled by a
microprocessor on the furnace control board but the means for doing so
is so brutal that it conducts the broadband hash onto the power line,
the thermostat cable and the A/C control cable leaving the furnace.

I get broadband hash S9+10 from my front loading energy efficient
washing machine.  Same issue as above, the motor control has no concern
for the sharp edges generated when switching the power to the motor and
consequently conducts this hash into the power line and directly through
the chassis of the unit.

I get broadband hash from the halogen under-cabinet lighting in my
kitchen which uses a so-called "solid state transformer"--  which is
really nothing more than a very crappy switching power supply.

Broadband hash from numerous "wall warts" that power pieces of
computer
gear--  network connected music players, routers, laptops... all of these
supplies are physically too small to house any amount of filtering and
so the switching hash goes right back onto the power line for efficient
distribution throughout the house and neighborhood.

I think the FCC gave up on Part 15 compliance years ago...

Sad and very frusterating.

I've found I don't hear these noise sources on 10.368 GHz however :-)

Chris  N0JCF

On Tuesday (04/07/2009 at 11:38AM -0400), KC0NNC at aol.com wrote:
> We need to file a complaint with the FCC ASAP....
> 
> Is anyone familiar as to how to proceed, probably the ARRL:
> 
> 
> Perry:    are you aware that the fluorescent compact bulbs are causing
havoc
> with ham band receivers?
> 
> Could you bring this to the attention of someone at the ARRL: as hard as
we
> have fought BPL we need to petition the FCC to require that these devices
are
> non EMI emitting....  Does the ARRL have a posture on this yet?
> 
> Please advise via a "reply all" so this will get posted on green
keys....
> 
> Harvey E. Smith
> 2020 Baculite Mesa Road
> Pueblo, CO., 81001-2456
> 719 406 9735
> 
> fka WA0BBG
> nka KC0NNC
> 
> HarveyEsmith at aol.com
> 
> KC0NNC at aol.com
> 
> 
> 73's

--Chris Elmquist

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