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Message-ID: <7D653C9C42F5D411A27C00508BF8803D06D311D7@mail.dstl.gov.uk>
From: Talbot Andrew <ACTALBOT@mail.dstl.gov.uk>
To: rsgb_lf_group@blacksheep.org
Date: Wed, 13 Sep 2006 08:50:00 +0100
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Subject: LF: RE: Re: Re: RE: Strange detector
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Status: O

If you're generating 1kW of real power, and feeding that into a -30dB
antenna for your 1 Watt ERP, that gives 999 Watts of 'lost' power for you to
extract and light up your bulb.

Andy  G4JNT (still lurking around low frequencies)


-----Original Message-----
From: owner-rsgb_lf_group@blacksheep.org
[mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of captbrian
Sent: 13 September 2006 01:51
To: rsgb_lf_group@blacksheep.org
Subject: LF: Re: Re: RE: Strange detector

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" <captbrian@ukonline.co.uk>
To: <rsgb_lf_group@blacksheep.org>
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" <g4wgt@tiscali.co.uk>
> To: <rsgb_lf_group@blacksheep.org>
> 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: owner-rsgb_lf_group@blacksheep.org
> > [mailto:owner-rsgb_lf_group@blacksheep.org]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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