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: [email protected]
[mailto:[email protected]] On Behalf Of captbrian
Sent: 13 September 2006 01:51
To: [email protected]
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" <[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.
> >
> >
> >
> >
>
>
>
"This e-mail is intended for the recipient only. If you are not the
intended recipient you must not use, disclose, distribute, copy, print,
or rely upon this e-mail. If an addressing or transmission error has
misdirected this e-mail, please notify the author by replying to this e-mail."
"Recipients should note that all e-mail traffic on MOD systems is
subject to monitoring and auditing."
|
