"A db here and a db there and pretty soon you lose 3db" to paraphrase
Everett Dirksen for those old enough to remember. I built a spread
sheet of cable loss by band, amp out to antenna terminals, every foot of
every cable. It seemed to me that good coax db's were cheap vs amp +
tower + antenna db's. One size doesn't fit all, I use LDF5, LDF4,
Buryflex, and RG400. Most every band has 3 of these 4. Depends on band
and lengths and purpose. My result < 1db loss every band for the
monobanders 80 > 10. Connectors (good ones) hardly matter except for
weather proofing and mechanical strength. I use DINs for hardline for
several reasons other than lower loss.
Grant KZ1W
On 10/30/2018 7:21 AM, Wayne Kline wrote:
My old gray matter is not 100% recall on an article in QST or CQ regarding
connector loss. The tester uses a spectrum analyzer and a TDR with other lab
equptement.
He had up to 20 barrels ,T. and Pl259’s with short lengths of coax .
And the findings were that @ HF and insertion loss was minimal and the BIGEST
issue was lossy CABLE
Wayne W3EA
Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10
________________________________
From: TowerTalk <towertalk-bounces@contesting.com> on behalf of john@kk9a.com
<john@kk9a.com>
Sent: Tuesday, October 30, 2018 7:34:09 AM
To: towertalk@contesting.com
Cc: wa6ibu@earthlink.net
Subject: Re: [TowerTalk] How many connectors?
I have a lot more connectors than that and my station is quite loud. Use
a quality connector such as Amphenol or Andrew/Commscope and don't believe
the old wives tale of PL-259 loss. Also use the best feedline that you can
afford.
John KK9A
To: <towertalk@contesting.com>
From: "Paul Booth" wa6ibu
Date: Mon, 29 Oct 2018 22:43:16 -0700
This may have been asked before, but I am cleaning up my system from
temporary to permanent installation and I was thinking about putting in a
patch panel. My question is what is a reasonable number of connectors and
barrel connectors to have between antenna and amplifier. For now the
antennas go directly to the amp but I'm adding antennas and was going to
neaten things up with a patch panel so that I would have;
1. Connector at antenna
2. In/out connectors through lightning protection in junction box
outside the house
3. Patch panel inside house on other side of wall which would have
1-barrel through panel, connect on backside and on frontside
4. Then a connector to the amp or possible a switch (which would add
two additional connectors)
Is there a rule of thumb for any of this? Thanks.
73s, Paul, W6IBU
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