Jim,
Yes, using quality connectors and barrels, especially the Amphenol
(W3L)PL-259, 83-1SP only is another W3LPL-ism!
Jack, W3KX
On Mon, Sep 25, 2023 at 5:53 AM Jim Brown <jim@audiosystemsgroup.com> wrote:
> On 9/25/2023 2:10 AM, Jack Ference wrote:
> > You must always “Frank” all PL-259 connectors using a small wrench to
> complete the physical and electrical connection.
>
> And Frank emphasizes, as do I, that all connectors, including barrels
> and adapters, must be first quality. For me, that means Amphenol 83-!SP
> for cable-mount males, and comparable adapters; in the case of adapters,
> stamped MIL-spec used/surplus parts that I buy at ham flea markets. I'm
> not familiar with qualifications of components in parts of the world
> other than North America.
>
> While there may be decent parts by other vendors sold as OEM parts to
> mfrs, some of which have the capabilities to QC them, I have learned not
> to trust anything but Amphenol and MIL stuff. If it isn't that
> top-quality Amphenol or MIL, I consider it JUNK.
>
> When getting back on the air in 2003, I built a parts stash of various
> adapters from hamfest vendors, including those who advertise in QST.
> Over 5-10 years, those parts caused me all sorts of grief. Tees and
> elbows had tiny wire springs rather than the solid centers of real
> adapters; I had one melt during a contest. Others generated
> intermittents that were a pain to troubleshoot. A three-way female tee,
> supplied by a mfr of a VHF antenna, fell apart mechanically!
>
> And don't get me going on the glorified zip-cord sold for power and
> speakers, which has super-thick insulation but with copper that's much
> smaller than the advertised gauge. AND the zip cord is LOUSY for RFI;
> ALL power and audio cables should be TWISTED PAIR, which strongly
> resists RFI, HUM, and NOISE, while zip cord does NOT! Cables for ALL
> such installations should be twisted pair, including those when they
> carry PULSED DC for applications like solar systems, where the charge
> current PULSE-MODULATED DC rectangular waves; that content is DC plus a
> VERY strong broadband RF component. The same is true of what goes into
> and comes out of CD-AC inverters. BTW -- the ARRL book on alternative
> power is a train wreck about this stuff!
>
> This reflector is about RFI, so I'm going into the weeds, which is where
> the bodies are buried!
>
> 73, Jim K9YC
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--
*Jack J. Ference*
jackference@gmail.com
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