I'm sure Jim Brown will advise you to read his tutorials, but, basically,
keep rf out of the shack.
73
David
G3UNA
Larry I do RFI engineering. Pacemakers are a lot like avionics relative to
ham
radio. The working spectrums for pacemakers, avionics, and ham radios are
widely
separated by
get reminded to turn it down. Still happens ocassionally.
Happily hamming,
73, de Jim KG0KP
- Original Message -
From: David Cutter d.cut...@ntlworld.com
To: Elecraft elecraft@mailman.qth.net
Sent: Thursday, May 26, 2011 1:31 AM
Subject: Re: [Elecraft] OT -RFI question
I'm sure
it down. Still happens occasionally.
Happily hamming,
73, de Jim KG0KP
K3 1442, P3 0089
- Original Message -
From: K2GN k...@k2gn.com
To: Elecraft elecraft@mailman.qth.net
Sent: Wednesday, May 25, 2011 1:35 PM
Subject: [Elecraft] OT -RFI question
I'm getting a Pacemaker installed
Thanks for all the great opinions, experiences and web links.
de K2GN - Larry
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of K2GN
Sent: Wednesday, May 25, 2011 3:36 PM
To: Elecraft
Subject: [Elecraft] OT -RFI question
I'm
On 5/25/2011 2:01 PM, FRED TOWNSEND wrote:
Pacemakers are a lot like avionics relative to ham
radio. The working spectrums for pacemakers, avionics, and ham radios are
widely
separated by both frequency and function. The probability of their mutual
interaction is very small. Unfortunately
As noted by several others the pacemaker industry has indeed recognized the
issues surrounding potential interference problems. Most probably remember
the issues with microwave ovens - a problem solved over 30 years ago- but
you still see the warning signs.
In general, the typical ham does not
On 5/26/2011 1:01 PM, Ed, W9EJB wrote:
It was the digital modulation modes that caused some
problems; all of which have been fixed for many years now.
Note that what you're calling digital modulation is 100% amplitude
modulation of a carrier by a series of pulses. For TDMA (time division
On Thu, May 26, 2011 at 12:56 PM, Jim Brown j...@audiosystemsgroup.comwrote:
...a cell phone used by the person wearing pacemaker -- worst case, it's a
1 watt
PEP AM UHF, transmitter...
This is interesting. I thought cellphones used an ADC to convert your audio,
then some sort of FSK to
TDMA (time division multiple access) cell phones share a frequency
channel by transmitting only in certain time slots. The power is pulsed
on and off even though the modulation mode may be constant-power.
Al N1AL
On Thu, 2011-05-26 at 15:19 -0500, Tony Estep wrote:
On Thu, May 26, 2011 at
On 5/26/2011 1:30 PM, Alan Bloom wrote:
TDMA (time division multiple access) cell phones share a frequency
channel by transmitting only in certain time slots. The power is pulsed
on and off even though the modulation mode may be constant-power.
Yes. For at least one of the commonly used
The major problem with the digital modes (amplitude pulse modes) occured
during the initial protocol between the cell phone. This is a max power
mode and occurs prior to phone ringing. The peak powers were as high as 10
watts. Also, during power save modes of TDMA, the packet rate can be as
I'm getting a Pacemaker installed.
Has anyone heard of RFI issues with Pacemakers?
de K2GN - Larry mailto:k...@k2gn.com - http://k2gn.com http://k2gn.com/
K3 S/N - 3278P3 S/N - 51 LPA500
__
Elecraft mailing list
Home:
Suggest you read:
http://www.ce-mag.com/archive/2000/novdec/kimmel.htmlas a
preliminary source.
John Ragle -- W1ZI
=
On 5/25/2011 3:35 PM, K2GN wrote:
I'm getting a Pacemaker installed.
Has anyone heard of RFI issues with Pacemakers?
de K2GN - Larrymailto:k...@k2gn.com -
not RFI heard about here, but certainly magnetism. I know someone with a P/M
and they had to be careful about lots of motor type stuff and significantly,
security scanners in airports
Suggest you discuss this with your consultant and google it
73 de M0XDF
--
Dear God, Did you mean for the
: Wednesday, May 25, 2011 14:35
To: Elecraft
Subject: [Elecraft] OT -RFI question
I'm getting a Pacemaker installed.
Has anyone heard of RFI issues with Pacemakers?
de K2GN - Larry mailto:k...@k2gn.com - http://k2gn.com http://k2gn.com/
K3 S/N - 3278P3 S/N - 51 LPA500
is your best
defense.
73
de Fred, AE6QL
From: K2GN k...@k2gn.com
To: Elecraft elecraft@mailman.qth.net
Sent: Wed, May 25, 2011 12:35:31 PM
Subject: [Elecraft] OT -RFI question
I'm getting a Pacemaker installed.
Has anyone heard of RFI issues with Pacemakers
that may also effect your pacemaker. Knowledge is your best
defense.
73
de Fred, AE6QL
From: K2GNk...@k2gn.com
To: Elecraftelecraft@mailman.qth.net
Sent: Wed, May 25, 2011 12:35:31 PM
Subject: [Elecraft] OT -RFI question
I'm getting a Pacemaker installed
On 5/25/2011 2:01 PM, FRED TOWNSEND wrote:
Also the designers of pacemakers are usually focused on medical
function and may miss critical RFI errors.
The first generation of pacemakers were very susceptible to
audio rectification. After a great deal of pressure from the
FCC and others,
Just re-iterating David's advice.
In my former life I worked in a factory.
My former boss had to get a pacer and was told specifically to stay
away from large magnetic fields. Well, the large, three phase 480V
motors used on large machinery like press brakes, shears, and even
transformers in
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