I guess that's because the ERP is far field power while the "stolen power"
(via the HF antenna) comes from the near field energy power.
Or otherwise: the 4 Watt is not radiated from the LF-antenna to the
HF-antenna but capacitive coupled.
73, Rik ON7YD - OR7T
At 01:51 13/09/2006 +0100, you wrote:
what puzzles me is that you can energise a bulb [300 ma x 12.6volts?] at
nearly 4 watts with an ERP of less than 1 watt...........;-))
G3GVB
----- Original Message -----
From: "captbrian" <[email protected]>
To: <[email protected]>
Sent: 11 September 2006 20:30
Subject: LF: Re: RE: Strange detector
> You have been lucky so far. I would disconnect HF antenna pdq before
> LF-ing.
>
> Bryan
> ----- Original Message -----
> From: "Gary - G4WGT" <[email protected]>
> To: <[email protected]>
> Sent: 11 September 2006 13:49
> Subject: LF: RE: Strange detector
>
>
> > Hi J & LF,
> >
> > I have a Yaesu FT-747GX & when I Tx LF I see a light shining out of the
> back
> > slots onto the wall from the Rx antenna fuse bulb. Yes the bulb is lit
to
> > full brilliance, the operation FT-747GX doesn't appear to have been
> > effected. LF RF is being picked up on the HF antenna.
> >
> > 73
> >
> > Gary - G4WGT.
> >
> > -----Original Message-----
> > From: [email protected]
> > [mailto:[email protected]]On Behalf Of J. Allen
> > Sent: 11 September 2006 05:38
> > To: LF (RSGB); LowFER at LW Cafe
> > Subject: LF: Strange detector
> >
> >
> > Haloo Group,
> >
> > I wonder how many here have similar oddities to share....
> >
> > Another part of my hobby is contesting... I have a RAT PAK remote
antenna
> > switch which mounts on the tower which is used for LF. The RAT PAK
> although
> > not in use on LF has a set of six LEDs to indicate which antenna has
been
> > selected in the shack during HF operation.
> >
> > This is where the odd indication comes in. Whenever the LF transmitter
> > keys, all six LEDs glow softly and the brilliance of the LEDs increase
> with
> > the power level. It makes a nice indicator that the beacon is working
and
> > putting out reasonable power. The first time I keyed down with more
than
> 50
> > watts, it was quite a surprise. 150 Watts glow at what looks like 1/10
of
> > brilliance.
> >
> > Now lets calculate... if 400 watts turns out to really be 1 W ierp here,
> > full brilliance would mean how many dB above legal limit? :o)
> >
> > J.
> >
> >
> >
> >
>
>
>
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