Andy,
I wonder if you have slightly misinterpreted the outcome of WRC-12. I think the
passage that Rik quoted shows that we can still have the full 5 W if we are
more than 379 km north of the French Mediterranean coast (800-621). Do you
agree?
73 John F5VLF
> On 10 Jan 2016, at 17:15, F6CNI - Andy - JN19QB <[email protected]> wrote:
>
> Hi all.
>
> I agree 100% with RIK.
>
> Yes, and in France the EIRP limit is 1 Watt only, because the minimum
> distance from the south coast in France to Algeria is below 800 km (621 km
> exactly).
>
> This 1 Watt EIRP means about 0.6 Watt ERP (In France the ERP is call PAR
> “Puissance Apparente Rayonnée”), due to the 2.14 dB isotropic gain of a
> monopole over a perfect ground. Even if the ground is not perfect (outside of
> the main lobe formation, that is the begining of the Fraunhofer zone), a 2 db
> value is a reasonable choice.
>
> If you have a very good antenna ( i.e. 30 meters vertical part, a large top
> hat capacitance, and a good ground system, your antenna has around 10%
> effeciency), you need only 6 Watts output TX to have 1 W EIRP. But using a
> short vertical without top hat and not good ground (perhaps 0.1% efficiency)
> you need a 600 Watts TX to reach the legal limit. HI !
>
> On the way : yes, on MF and LF bands it is a good choice to show your EIRP
> power.
>
> 73 de Andy F6CNI.
>
>
> From: Rik Strobbe
> Sent: Sunday, January 10, 2016 4:36 PM
> To: [email protected]
> Subject: RE: LF: RE: JT9 actvity...
>
> Hi Markus,
>
> not everywhere!
>
> The outcome of WRC-12 was:
> "The maximum equivalent isotropically radiated power (e.i.r.p.) of stations
> in the amateur service using frequencies in the band 472-479 kHz shall not
> exceed 1 W. Administrations may increase this limit of e.i.r.p. to 5 W in
> portions of their territory which are at a distance of over 800 km from the
> borders of Algeria, Saudi Arabia, Azerbaijan, Bahrain, Belarus, China,
> Comoros, Djibouti, Egypt, United Arab Emirates, the Russian Federation, Iran
> (Islamic Republic of), Iraq, Jordan, Kazakhstan, Kuwait, Lebanon, Libya,
> Morocco, Mauritania, Oman, Uzbekistan, Qatar, Syrian Arab Republic,
> Kyrgyzstan, Somalia, Sudan, Tunisia, Ukraine and Yemen. In this frequency
> band, stations in the amateur service shall not cause harmful interference
> to, or claim protection from, stations of the aeronautical radionavigation
> service."
>
> In Belgium the power limit is 5W EIRP (3 W ERP), I believe this is also the
> case in the Netherland, UK and Ireland.
>
> But you are right about the saturation. With the right antenna (height) it is
> easy to produce many 10's W ERP with a few 100W TX power.
>
> 73, Rik ON7YD - OR7T
>
> Van: [email protected] [[email protected]]
> namens Markus Vester [[email protected]]
> Verzonden: zondag 10 januari 2016 16:03
> Aan: [email protected]
> Onderwerp: Re: LF: RE: JT9 actvity...
>
>
> Note however that the power scale saturates at 1 W ERP, which is (by
> definition) the largest power an amateur can possibly radiate on LF and MF ;-)
>
> Best 73,
> Markus (DF6NM)
>
>
> -----Ursprüngliche Mitteilung-----
> Von: Rik Strobbe <[email protected]>
> An: rsgb_lf_group <[email protected]>
> Verschickt: So, 10 Jan 2016 3:42 pm
> Betreff: LF: RE: JT9 actvity...
> Hello Szigy,
>
> regarding the declared power level in WSPR: Most stations declare their ERP,
> not
>
> PA output.
>
>
>
>
>
> 73, Rik ON7YD - OR7T
>
>
>
>
>
> ________________________________________
>
>
> Van:
> [email protected] [[email protected]]
>
> namens Szigy [
> [email protected]]
>
> Verzonden: zaterdag 9 januari 2016 20:22
>
>
> Aan:
> [email protected]
>
> Onderwerp: LF: JT9 actvity...
>
>
>
>
>
> From: YO2IS
>
> Hello from KN05ps,
>
>
> was pleased to take part in the 8 ian JT9 activity.
>
>
> Lot of signals received, propagation was similar to 2m Es !
>
>
> very short openings from unexpected QTF's.
>
>
> Nice QSO with DG3LV in JO53, IZ7SLZ responded to my CQ he was
>
>
> a solid -23 then nil. Received again OR7T -27, we had a nice
>
>
> QSO a day before, also wkd DC1RJJ who responded to my CQ !!.
>
>
> CWNR, several times IW4DXW up to -24 and DF7FC -20 he often is
>
>
> reporting my WSPR-2 nil in JT9...
>
>
> My TVRT / IRF540 had only 20 W out into the 41m sloping wire.
>
>
> it seems that the IC-7000 is not as bad for reception on LF / MF.
>
>
> Surprised also by the WSPR-2 results, litle confused with the
>
>
> received signal levels versus de declared power dBm! are real ?...
>
>
> Enjoy the good winter conditions.
>
>
> 73 & DX, Szigy.ÿþ?ÿþ?
>
[email protected]
Researching history of RABSON, BLACKSHAW, GAUNTLETT, VERLANDER and ROBSONNE
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