[UK-CONTEST] Power Limitations

[Colin Thomas]

This discussion is of particular interest as many of the discussions going
on at the WRC are not only concerned with frequency allocations but with
permitted power levels.   Taking the opposite end of the spectrum for
instance, the discussions around the 500 kHz agenda item are on the
proposed 5W EiRP.

Taking into consideration the real estate available to the average amateur
it is probably going to take considerable imagination and antenna work to
achieve anywhere near this power output.

Incidentally there are also discussion going on regarding a possible future
agenda item regarding "Green Radio".   This is a Netherlands proposal at a
very early stage but will be followed closely.

73

Colin HB9/G3PSM

On 28 January 2012 12:17, Don Field <don.field at gmail.com> wrote:

> Surely setting an ERP limit goes against everything amateur radio is about.
> Station improvements are surely what we should strive for - antennas are a
> major part of that, along with low loss coax, etc. ERP can be achieved
> simply by turning up the output power - no skill required. Those other
> station improvements might help your receive performance, too!
>
> Don G3XTT
>
> On 28 January 2012 11:43, Rob Harrison <robharrison at g8hgn.freeserve.co.uk
> >wrote:
>
> > Hi Ray,
> >
> > I find this argument re accuracy of ERP frankly poor. I've put this idea
> > forward for consideration for VHF/UHF contests, but it would apply to HF
> > also. I get the same old weak arguments against, when frankly the
> arguments
> > for power only are weak too, as they don't take into account antennas of
> > any
> > sort, which is bizarre.
> >
> > Everyone seems to be hung up with the Nth degree of ERP accuracy, surely
> we
> > can agree on generic gain for certain antennas, we know the power out,
> > feeder loss, it's relatively simple to work out a figure for any given
> > station to within fairly accurate limits. Not taking antenna gain into
> > account at all is utterly wrong.
> >
> > It seems there is a reluctance to even try it, are vested interests at
> play
> > here?
> >
> > 73
> >
> > Bob G8HGN
> >
> > ----- Original Message -----
> > From: "Ray Hills" <g3hrh at btinternet.com>
> > To: <uk-contest at contesting.com>
> > Sent: Saturday, January 28, 2012 11:21 AM
> > Subject: [UK-CONTEST] Power Limitations
> >
> >
> > >I don't think using ERP to set the limit will work because few, if any,
> > > actually have the ability to determine it accurately.  They would have
> to
> > > rely on the antenna manufacturers' claims, not all of which are
> reliable
> > -
> > > or even credible.  Power into the antenna is OK because many (most?)
> have
> > > a
> > > Bird, especially if it has the peak power modification.  I find it very
> > > reassuring to have a Bird permanently in circuit, as part of the
> antenna
> > > patch panel set-up, to make sure that all is both healthy and within
> the
> > > power limit for any particular contest.
> > >
> > > Ray  G3HRH
> > >
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> >
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