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Rik ..
It may seem odd that 9 Khz
causes concern but I think there was some concern at tx
causing problems with a lightning detection system
working round 10 khz ..... substitute 'very bright
flash' for 'lightning' and it makes more sense .. but as
that's not so high on the menu these days .. they
just use it to check your insurance claims for static
damage against recorded 'events' close to you .....
G ..
Sent: Friday, February 26, 2010 3:32 PM
Subject: RE: LF: Fwd: Special Permits for Amateur Radio Operation
below 9kHz?
If Ofcom wants to (or
must) regulate "transmissions" below 9kHz they must have a lower limit of whant
they consider radiation. Otherwise one wouild need a NoV to connect an audio
amplifier to a loudspeaker via a cable. Unless the the matching is perfect the
cable will radiate some nannowatts or picowatts.
With amateur means (antenna's , power) we
won't radiate much more than a few milliwatts.
73, Rik ON7YD - OR7T
Yes, unbelievable isn't it!
Been going gon for abt 4 weeks now.
On 26 February 2010 13:46, Graham <[email protected]>
wrote:
Warren ,
If you think this is bad, you
should take a look at the 'ROS' discussion's in the yahoo
digital data group .. SS paranoia has taken hold !
G
..
--------------------------------------------------
From: "Warren
Ziegler" <[email protected]>
Sent: Thursday,
February 25, 2010 9:31 PM
To: <[email protected]>
Subject:
Re: LF: Fwd: Special Permits for Amateur Radio Operation below 9kHz?
Asking Ofcom for a license or Nov to generate a signal
that will not
extend past your own garden seems like a lot of trouble
for
nothing....
--
73 Warren K2ORS
WD2XGJ
WD2XSH/23
WE2XEB/2
WE2XGR/1
On Thu, Feb 25, 2010 at 3:28 PM, Jacek Lipkowski <[email protected]> wrote:
On Thu, 25 Feb 2010, Roger Lapthorn wrote:
People may be interested in the reply from Rod
Wilkinson at OFCOM received
today. I asked him what OFCOM's view
would be.
[...]
They state that ITU Radio Regs indicate that there
is no allocation for
frequencies below 9 kHz. However in the UK, a
licence would be required as
there is no lower frequency limit for
wireless telegraphy under the WT Act
2006.
[...]
there is already a very big commercial user of
the elf and vlf spectrum,
they inject very big power into ground
dipoles. emissions from one continent
can be heard on another. and they
do this without any license from the radio
authorities. the only
regulation they need regards maximum field strengths
(and this is
usually the realm of some environmental protection authority
and not
the radio authority). the operating frequency varies, but is
usually
50Hz, 60Hz, 16.6Hz etc :)
sometimes when dealing with
the goverment, the best practice is not to ask
at all :) even if they
agree with you there will always be a "but you will
need a license for
that" clause.
if you have to ask, ask them if it is their duty to
regulate potential
electromagnetic wave transmission from instalations
operating on 50Hz (or
any other frequency in the 0-9kHz region, that is
not ITU regulated). you
would probably get an entirely different answer
:)
VY 73
Jacek / SQ5BPF
ps. the answer that you got
from OFCOM is actually very
nice
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