Date: Mon, 25 Jun 2018 22:35:21 -0700
From: Avery Davis <wb4rtp@mindspring.com>
To: "Charlie@thegallos.com" <charlie@thegallos.com>
Cc: towertalk@contesting.com
Subject: [TowerTalk] N connector, Re: UHF (PL259) soldered center
with braid crimp or, crimp-crimp, supply?
<Charlie,
<Would you please share a link to a source that discusses the limits of N
<connectors?? Everything I have seen so far suggests they have as good or
<better power handling at low frequencies than the PL-259, and are much
<better at UHF as they are constant impedance (lower loss, higher power,
<lower SWR).? For example, Amphenol rates their SO-239 at 500 V, while
<their Type N is rated at 1500 Volts.? That sounds like better power
<handling, to me.? The current rating wasn't listed, but I would think
<that they would be about the same as the wire gauge in the coax cable
<center conductor, since both connectors have center contact outer
<diameter about the same as RG-8 or RG-213 coax, especially if skin-depth
<effects are taken into account.?
<I would appreciate a link to a better source of information on this.
<73,
<Avery, WB4RTP
## Forget what amphenol states. A teflon PL-259 will hi pot test a heck of
a lot higher
than a Type N. Type N uses a puny center pin, identical to a BNC. The center
pin
on any PL-259 is huge by comparison. There is no RF on the center pin any way.
The
RF travels down the outside of the mating female of the SO-239. You can
stuff 10+ kw
through a quality teflon silver, correctly installed PL-259 + SO-239 pair.
Avoid high swr, which can
easily be fixed, right at the feed point. 10 kw = 707 volts RMS... = 1000
volts peak. 10 kw = 14 A RMS.
5kw = 10A RMS and 500 Vrms.... = 707 Volts peak..which is dick. You wont
blow anything up with 1.5 kw.
## The next step above the silver teflon PL-259 and SO-239 setup is the
teflon silver 7-16 DIN connector.
The 7-16 is the real deal. Nobody uses Type N anymore, the telcos all dumped
the type N years ago..and swapped
to 7-16 din. What really looks silly is huge heliax, like .875 and bigger
variety... with a type N connector installed,
complete with the puny BNC sized center pin.
Jim VE7RF
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