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From: John W Gould <jwgould@iee.org.uk>
Date: Thu, 24 May 2007 11:36:59 GMT
Message-ID: <Zen-1HrBcp-0002Dj-3r@pythagoras.zen.co.uk>
Subject: Re: LF: RE: 500kHz Distance
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Thanks Rik, that's an interesting thought to have a max ERP stipulated.  It might make matters easier with Ofcom as they would be able to consider the worst case.

73 John, G3WKL

Rik Strobbe <Rik.Strobbe@fys.kuleuven.be> wrote :

> > I'd be interested in any further views to Laurie's proposal; I'am   
> > open to suggestions as to the power level, but it will be important   
> > to hit a target that is both challenging to the experimenter,   
> > helpful for continued propagation research and also one that will   
> > not provide too much risk for Ofcom in terms of coordination with
> 
> John,
> 
> a 10 or 20 Watt Tx power limitation would probably allow a few Watt  
> ERP for big antennas (and low losses). But the poor guy with the small  
> backyard antenna will not be able to reach 100mW ERP.
> Maybe a "OR" limitation would serve best: 20W TX power or 100mW ERP
> (meaning: you can use whatever power needed to get 100mW ERP but if  
> you reach 100mW ERP with less than 20W you can "pump up" to 20W)
> 
> 73, Rik  ON7YD
> 
> 
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