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 [email protected] wrote:
From: Graham Shirville [email protected] Subject: [amsat-bb] Re: [amsat-florida] Re: FCC 70cm Proposal To: "Louis McFadin" [email protected] Cc: [email protected], ams[email protected] Date: Wednesday, 15 April, 2009, 5:27 PM Hi Lou,
Yes I agree we should never relax!
Thanks for reminding me of the fact:)
[email protected] Sent: Wednesday, April 15, 2009 4:51 PM Subject: Re: [amsat-florida] Re: [amsat-bb] FCC 70cm Proposal
I don't believe relaxing is a good idea. Constant
vigilance by all is the
mantra to have. I am worried about getting sued for
causing someone to
have some reaction to my 70CM signal I send up to AO51
or other satellite
or talking to the local repeater. Someone who I
have no knowledge of.
We should ask them to stay away from the 70 cm ham
band. 400Mhz is OK as
long as they can accept signals from 420 + without
I would think something that has health consequences
would receive a lot
of careful safety analysis before being made
On Apr 15, 2009, at 4:28 AM, Graham Shirville wrote:
A further check with an expert gives me this
"No protection at all - at least in Europe. Short
Range Devices must not
cause interference and must suffer any
interference they receive. Ofcom
don't like that, but it's in the Short range
Device Directive. Not that
Ofcom pay any attention to it if they can avoid
doing so. Even Part 95
MICS devcies in the US get no protection, and that
applies every where else,
so perhaps we can relax?
[email protected] Sent: Wednesday, April 15, 2009 8:38 AM Subject: Re: [amsat-bb] FCC 70cm Proposal
From another group I read that the maximum
power radiated outside the
body will be around -30 to -40dBm, so not much
chance of these systems being
a problem to us.
But of course if they expect "protection" from
Sent: Monday, April 13, 2009 11:18 PM Subject: [amsat-bb] FCC 70cm Proposal
This is interesting.... N4ZQ
FCC Proposes to Allocate 20 MHz of
Spectrum in 413-456 MHz Band For
Implanted Neuromuscular Devices
The FCC has released a Notice of Proposed
Rulemaking (NPRM - ET Docket
09-36) seeking comment on a proposal to
allocate 20 MHz of spectrum in
the 413-457 MHz band for use by wireless
medical devices that could be
implanted into the human body and used to
restore sensation and
mobility to paralyzed limbs and
organs. The devices would act as a
wireless medical micro-power network (MMN)
within the patient. Among
the conditions that could be treatable
using MMNs include polio, ALS
(Lou Gehrig's disease), cerebral palsy,
and spinal cord injuries.
The 400 MHz band is targeted because it is
optimal for RF propagation
through body tissue. The
devices would require at least 5 MHz of
bandwidth to function and would operate on
a low power, secondary non-
interference basis. Twenty MHz of
spectrum in four band segments are
proposed so that the device would have
four options in case one band
segment was already in use in a given
area. The NPRM seeks comment on
the feasibility of four different band
Comment is also sought on:
- Potential for interference between MMNs
and incumbent users
- Service rules (licensed or unlicensed,
communications, eligibility, etc.)
- Technical rules (power limitations,
bandwidth, frequency stability,
channelization, antenna locations, etc.)
The text of the News Release is available
Learning Centers - Click Here. http://thirdpartyoffers.netzero.net/TGL2241/fc/BLSrjpYXVv0gKYPqCr8IkCaCq5KAF...
Sent via [email protected].
Opinions expressed are those of the
author. Not an AMSAT-NA member? Join now to
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Via the AMSAT-Florida mailing list courtesy of
Lou McFadin W5DID [email protected]
Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb