Re: [amsat-florida] Re: FCC 70cm Proposal

15 Apr 2009

      Hi Graham,
We should bear in mind that in the British Isles and Europe Automobile Key Fobs, which operate on 433.920 MHz as against the 315 MHz used elsewhere, are also "Unprotected Devices".
In a number of cases in the UK where people have complained about being unable to open their Automobiles in the vicinity of licenced 70cm Amateur Radio Repeaters then the Regulator (Ofcom in UK) has forced the licensed Amateur repeater to shutdown.
Nevermind the cause of the problem is the Automobile Key Fob receiver. These typically have wide open front ends that collapse in the presence of strong RF fields.
For those in North America, repeaters in the UK are individually licensed and now as a result of Key Fobs using 433.920 MHz anyone wishing to set up a 70cm repeater has to prove to the regulator that the "Unprotected" Automobile Key Fobs will not suffer "interference" (overload) from the repeater.
Embedded (implanted) radio devices for medical applications is set to become a boom industry in the coming years. While the current FCC proposal relate to one particular application it is inevitable that once granted the frequencies will in coming years be used for a wide variety of other medical devices.
Irrespective of what may be said now the health care needs of citizens (voters) will take precedance over Ham Radio operations.
If these devices end up in Ham Radio allocations then we will in time be forced out.
73 Trevor M5AKA
--- On Wed, 15/4/09, Graham Shirville g.shirville@btinternet.com wrote:
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From: Graham Shirville g.shirville@btinternet.com
Subject: [amsat-bb] Re: [amsat-florida] Re:   FCC 70cm Proposal
To: "Louis McFadin" w5did@mac.com
Cc: amsat-florida@amsat.org, amsat-bb@amsat.org
Date: Wednesday, 15 April, 2009, 5:27 PM
Hi Lou,
Yes I agree we should never relax!
Thanks for reminding me of the fact:)
73
Graham
----- Original Message ----- 
From: "Louis McFadin" w5did@mac.com
To: "Graham Shirville" g.shirville@btinternet.com
Cc: "Keith N4ZQ" n4zq@netzero.com;
amsat-bb@amsat.org;
amsat-florida@amsat.org
Sent: Wednesday, April 15, 2009 4:51 PM
Subject: Re: [amsat-florida] Re: [amsat-bb] FCC 70cm
Proposal
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I don't believe relaxing is a good idea. Constant
vigilance by all is  the
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mantra to have. I am worried about getting sued for
causing  someone to
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have some reaction to my 70CM signal I send up to AO51
or  other satellite
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or talking to the local repeater. Someone who I
have  no knowledge of.
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We should ask them to stay away from the 70 cm ham
band. 400Mhz is OK  as
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long as they can accept signals from 420 + without
harm.
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I would think something that has health consequences
would receive a  lot
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of careful safety analysis before being made
operational.
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On Apr 15, 2009, at 4:28 AM, Graham Shirville wrote:
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A further check with an expert gives me this
response:
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"No protection at all - at least in Europe. Short
Range Devices must  not
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cause interference and must suffer any
interference they receive.  Ofcom
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don't like that, but it's in the Short range
Device Directive. Not  that
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Ofcom pay any attention to it if they can avoid
doing so. Even Part  95
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MICS
devcies in the US get no protection, and that
applies every where  else,
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too."
so perhaps we can relax?
cheers
Graham
----- Original Message -----
From: "Graham Shirville" g.shirville@btinternet.com
To: "Keith N4ZQ" n4zq@netzero.com;
amsat-bb@amsat.org;
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amsat-florida@amsat.org
Sent: Wednesday, April 15, 2009 8:38 AM
Subject: Re: [amsat-bb] FCC 70cm Proposal
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Hi All,
From another group I read that the maximum
power radiated outside  the
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body
will be around -30 to -40dBm, so not much
chance of these systems  being
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a
problem to us.
But of course if they expect "protection" from
our signals....
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...
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73
Graham
----- Original Message -----
From: "Keith N4ZQ" n4zq@netzero.com
To: amsat-bb@amsat.org;
amsat-florida@amsat.org
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...
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Sent: Monday, April 13, 2009 11:18 PM
Subject: [amsat-bb] FCC 70cm Proposal
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This is interesting....  N4ZQ
FCC Proposes to Allocate 20 MHz of
Spectrum in 413-456 MHz Band For
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Implanted Neuromuscular Devices
The FCC has released a Notice of Proposed
Rulemaking (NPRM - ET  Docket
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09-36) seeking comment on a proposal to
allocate 20 MHz of  spectrum in
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the 413-457 MHz band for use by wireless
medical devices that  could be
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implanted into the human body and used to
restore sensation and
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mobility to paralyzed limbs and
organs.  The devices would act as a
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wireless medical micro-power network (MMN)
within the patient.   Among
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the conditions that could be treatable
using MMNs include polio, ALS
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(Lou Gehrig's disease), cerebral palsy,
and spinal cord injuries.
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The 400 MHz band is targeted because it is
optimal for RF  propagation
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through body  tissue.  The
devices would require at least 5 MHz of
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bandwidth to function and would operate on
a low power, secondary  non-
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interference basis.  Twenty MHz of
spectrum in four band segments  are
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proposed so that the device would have
four options in case one band
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segment was already in use in a given
area. The NPRM seeks comment  on
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the feasibility of four different band
segments:
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413-419 MHz

426-432 MHz

438-444 MHz

451-457 MHz

Comment is also sought on:

Potential for interference between MMNs

and incumbent users
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Service rules (licensed or unlicensed,

definitions, permissible
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communications, eligibility, etc.)

Technical rules (power limitations,

bandwidth, frequency  stability,
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channelization, antenna locations, etc.)
The text of the News Release is available
at:
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http://hraunfoss.fcc.gov/edocs_public/attachmatch/DOC-289482A1.doc

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Learning Centers - Click Here.
http://thirdpartyoffers.netzero.net/TGL2241/fc/BLSrjpYXVv0gKYPqCr8IkCaCq5KAF...

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Sent via AMSAT-BB@amsat.org.
Opinions expressed are those of the
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author.
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Via the AMSAT-Florida mailing list courtesy of
AMSAT-NA
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AMSAT-Florida@amsat.org
http://amsat.org/mailman/listinfo/amsat-florida
Lou McFadin
W5DID
w5did@mac.com

Sent via AMSAT-BB@amsat.org.
Opinions expressed are those of the author.
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Trevor .

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