[Antennas] Extending Feedlines
A10382
[email protected]
2002年4月21日 18:40:07 -0400
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
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> Email: [email protected]
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