[Antennas] VSWR on Log Periodic.
Tom Horton
[email protected]
2002年4月25日 01:56:24 +0000
Frank,
Would you mind identifying youself? Some of
us like to know our writer via callsign.
Thanks, Tom K5IID
At 21:25 04/24/02 -0400, A10382 wrote:
>Measuring at the transmitter gives a good indication of how 'friendly' the
>transmission system (everything after the rig) is to the transmitter or amp.
>>Measuring at the antenna (power AND vswr) is the real indication of how
>friendly everything else is to the antenna.
>>How about a remote control meter at the antenna feed. Of course this
>remotely operated device would have to have almost no effects itself on the
>system when not 'reading'. Then you can measure at BOTH ends.
>>This would seem ideal. Is this thinking 'in band' or 'out of it' ?
>>73
>Frank
>><<--- END OF MESSAGE --->>
>----- Original Message -----
>From: "George, W5YR" <[email protected]>
>To: <[email protected]>
>Cc: "Dave Shrader" <[email protected]>; "antennas"
><[email protected]>
>Sent: Wednesday, April 24, 2002 8:37 PM
>Subject: Re: [Antennas] VSWR on Log Periodic.
>>> > Measurements made in the shack are readily interpretable and convertible
>to
> > readings at the antenna. And probably much more accurately than they could
> > be made at the antenna since the presence of the operator and
> > instrumentation tends to alter the operating environment.
> >
> > A couple of short- and open-circuit line measurements and either a real
> > Smith Chart or its computer complement and all shack readings can then be
> > translated to the antenna feedpoint.
> >
> > 73/72/oo, George W5YR - the Yellow Rose of Texas
> > Fairview, TX 30 mi NE of Dallas in Collin county EM13qe
> > Amateur Radio W5YR, in the 56th year and it just keeps getting better!
> > QRP-L 1373 NETXQRP 6 SOC 262 COG 8 FPQRP 404 TEN-X 11771 I-LINK 11735
> > Icom IC-756PRO #02121 Kachina 505 DSP #91900556 Icom IC-765 #02437
> >
> >
> > Don Havlicek wrote:
> > >
> > > In my opinion, the ONLY meaningful SWR measurements are AT THE ANTENNA..
> > > NOT at the shack!
> > > Don - N8DE
> > - - -
> >
> > Your moderator for this list is:
> > Larry Wilson KE1HZ [email protected]
> > _______________________________________________
> > Antennas mailing list
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> > http://mailman.qth.net/mailman/listinfo/antennas
> >
>>- - -
>>Your moderator for this list is:
>Larry Wilson KE1HZ [email protected]
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