[Antennas] Extending Feedlines
Lofstead, Jerry
[email protected]
Mon, 22 Apr 2002 12:10:03 -0400
..... I do believe someone forgot the (.) dot in front of the numbers...
The answer is less than the aggravation in the answers.. 8-).. Unless
you are at > 4 GHZ
Jerry
W3CDE
-----Original Message-----
From: Reginald Mackey [ mailto:[email protected] <mailto:[email protected]>
]
Sent: Sunday, April 21, 2002 10:47 PM
To: A10382; Nathan, Kevin; [email protected]
Subject: Re: [Antennas] Extending Feedlines
could you direct me to a text on this subject that you state on the
theory
of the losses here in your statement in "every connector inserts loss
into
the transmission line? Additionally, how to do you compute those
losses?
Thanks in advance,
Reggie
----- Original Message -----
From: "A10382" <[email protected]>
To: "Nathan, Kevin" <[email protected]>; <[email protected]>
Sent: Sunday, April 21, 2002 3:40 PM
Subject: Re: [Antennas] Extending Feedlines
> Hmmm.. not start a debate? how silly...
>
> Every connector inserts some loss into the transmission line. You
already
> have:
>
> Transceiver 1
> SWR meter 2
> Tuner 2
> Antenna switch(?) 2
> Antenna 1
> ----
> 8
>
> Just how many more do you want to add? A barrel is two (2) more!
Will
the
> barrel be outside or in? I'd vote for inside, even it means
shortening
the
> existing line somewhat.
>
> The other potential problem is ending up with two SLIGHTLY different
lines -
> unless you buy EXACTLY what you already have - same manufacturer and
same
> model# line.
>
> As connector do add some loss, are you DXing a lot of weak signals or
able
> to do fine now? The higher tower and better ground plane (and change
in
> impedance and SWR from being farther from earth will probably more
than
> offset 2 more connectors.
>
> <<--- END OF MESSAGE --->>
> ----- Original Message -----
> From: "Nathan, Kevin" <[email protected]>
> To: <[email protected]>
> Sent: Friday, April 19, 2002 12:27 PM
> Subject: [Antennas] Extending Feedlines
>
>
> > Hi All,
> >
> > It's been a few years since I've thought of doing this and I just
don't
> > remember the specifics. I am moving my vhf/uhf collinear from a
rooftop
> > tripod to my tower. Right now there is one single piece of RG8
feeding
> it.
> > However, this isn't long enough to reach the top of the tower. At
these
> > frequencies, approximately how much do you all think I would lose
going
> > through a barrel to add coax, which I already have, rather than
incurring
> > the expense of purchasing one long run of new stuff? How about the
same
> > thoughts for six meters? I don't want to start a debate here but am
just
> > looking for some kind of consensus before I head to the radio store
> > tomorrow. <GRIN>
> >
> > Thanks much and 73.
> > Kevin, K7RX
> >
> > Kevin Nathan, Independent Living Coordinator
> > Dept. of Services for the Blind
> > 3411 S. Alaska
> > Seattle, Wa 98118
> > Voice: (206) 721-6450
> > Cell: (206) 604-4767
> > Toll Free: (800) 552-7103
> > Fax: (206) 721-6403
> > Email: [email protected]
> >
> > - - -
> >
> > Your moderator for this list is:
> > Larry Wilson KE1HZ [email protected]
> > _______________________________________________
> > Antennas mailing list
> > [email protected]
> > http://mailman.qth.net/mailman/listinfo/antennas
<http://mailman.qth.net/mailman/listinfo/antennas>
> >
>
> - - -
>
> Your moderator for this list is:
> Larry Wilson KE1HZ [email protected]
> _______________________________________________
> Antennas mailing list
> [email protected]
> http://mailman.qth.net/mailman/listinfo/antennas
<http://mailman.qth.net/mailman/listinfo/antennas>
>
- - -
Your moderator for this list is:
Larry Wilson KE1HZ [email protected]
_______________________________________________
Antennas mailing list
[email protected]
http://mailman.qth.net/mailman/listinfo/antennas
<http://mailman.qth.net/mailman/listinfo/antennas>
--- StripMime Report -- processed MIME parts ---
multipart/alternative
text/plain (text body -- kept)
text/html
---