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Re: LF: declared power on WSPR

To: [email protected]
Subject: Re: LF: declared power on WSPR
From: Dimitrios Tsifakis <[email protected]>
Date: Wed, 6 Feb 2013 10:18:58 +1100
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Here in VK we are also allowed 5 W, however, if my antenna efficiency
calculations are correct, I need an order of magnitude more power to
get even close to  5 W radiated. Such an amplifier will cause my
antenna system to catch fire due to super high voltages :-)

A reason for the discrepancy between different "1 W" values may be
that the majority of amateurs would calculate rather than measure the
radiated power. And as we all know, the majority of back-yard antennas
are not quite lab reference antennas. If anything, I would guess that
calculated radiated power is overestimated compared to reality.

73, Dimitris

2013/2/6 Graham <[email protected]>:
> 1 watt  ?     you  can  have  fun in the  data  base , in  comparing  the
> various 1 watt  erp's  to see  who has the  best  1 watt  signal ,   a sort
> of  my  'one'  is better  than  your  'one'  !
> UK is  set  to  5  watts  : )
> G..
> From: Markus Vester
> Sent: Tuesday, February 05, 2013 10:57 PM
> To: [email protected]
> Subject: Re: LF: declared power on WSPR
> Hi Dimitris,
> unlike HF, antenna efficiencies at LF can differ vastly from one site to
> another. So it makes much more sense to state radiated power (ERP) than TX
> power.
> Note that under current regulations, ERP's beyond one watt are simply
> nonexistent, per definitionem ;-)
> Best 73,
> Markus (DF6NM)
> From: Dimitrios Tsifakis
> Sent: Tuesday, February 05, 2013 11:22 PM
> To: r[email protected]
> Subject: LF: declared power on WSPR
> Hi group,
> I was browsing the WSPR database for MF and noticed that I am the only
> one declaring a 50 W power. My TX power output is 50 W, however the
> radiate power is just a tiny fraction of 1 W. What is the protocol for
> WSPR? Advertise the Pout or the EIRP?
> 73, Dimitris VK1SV

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