[RFI] DFing intermittent connection

[K9MA]

Hi Frank,

That makes sense. All I ever used it for was as a shunt around the 
thrust bearing, for which the impedance probably wasn't that critical.

73,
Scott K9MA


On 8/16/2021 4:44 PM, donovanf at erols.com wrote:
> Hi Scott,
>
> Braid is always a poor choice outdoors unless its under pressure
> and protected from moisture such as inside jacketed coax cable
>
> When its no longer under pressure and protected from moisture
> the RF resistance of braid goes up dramatically because the
> crossovers in the braid no longer conduct effectively.
>
> That's why the appropriate choice for an outdoor conductor is
> stranded wire or solid wire and never braid
>
> 73
> Frank
> W3LPL
>
> ------------------------------------------------------------------------
> *From: *"K9MA" <k9ma at sdellington.us>
> *To: *donovanf at erols.com, rfi at contesting.com
> *Sent: *Monday, August 16, 2021 9:27:16 PM
> *Subject: *Re: [RFI] DFing intermittent connection
>
> Gee, it's worked for me for years. Not much salt spray in Wisconsin.
>
> 73,
> Scott K9MA
>
> On 8/16/2021 12:32 PM, donovanf at erols.com wrote:
>
>     Jim,
>
>     Please ignore Scott's advice, it will cause tower corrosion and
>     quickly fail
>
>     73
>     Frank
>     W3LPL
>
>     ------------------------------------------------------------------------
>     *From: *"K9MA" <k9ma at sdellington.us>
>     *To: *jimk8mr at aol.com
>     *Cc: *rfi at contesting.com
>     *Sent: *Monday, August 16, 2021 4:30:35 PM
>     *Subject: *Re: [RFI] DFing intermittent connection
>
>     Or just use the braid from some RG8 and a couple hose clamps.
>
>
>
>     ----------
>
>     Scott Ellington. K9MA
>
>      --- via iPhone
>
>     > On Aug 16, 2021, at 9:27 AM, jimk8mr--- via RFI
>     <rfi at contesting.com> wrote:
>     >
>     > The kit is basically a very heavy, very flexible cable, six
>     feet or so, with lugs on both ends, and clamps with a large flat
>     surface to attach to the mast and to the tower leg. I'd think that
>     the bottom lug could be attached to a tower bolt, or some other
>     low resistance connection to the tower.
>     > It would seem to also be simple to homebrew something a bit less
>     rugged, perhaps using a piece of RG-8, shield and center conductor
>     connected together.
>     >
>     > 73  -   Jim   K8MR
>     >
>     >
>     >
>     > -----Original Message-----
>     > From: EDWARDS, EDDIE J via RFI <rfi at contesting.com>
>     > To: RFI List <rfi at contesting.com>
>     > Sent: Mon, Aug 16, 2021 9:09 am
>     > Subject: Re: [RFI] DFing intermittent connection
>     >
>     > Just FYi...They told me they only have the bypass kits for
>     standard Rohn towers, but not for the BX or HDBX series towers.
>      Need to make your own for other non-rohn configurations.
>     >
>     > 73, de ed -K0iL
>     >
>     > -----Original Message-----
>     > From: RFI On Behalf Of jimk8mr--- via RFI
>     >
>     >
>     > You might look into DX Engineering's Bearing Bypass Ground Kits
>     DXE-BBGK-2-25-P.
>     > I installed one yesterday for K8AZ. I'm not sure if Tom had a
>     particular problem or it was just as a precaution. It easy to
>     install, the only issue in my case was that the tower had been
>     painted, so some paint scraping was in order. But much easier than
>     replacing a thrust bearing!
>     >
>     > 73  -  Jim   K8MR
>     >
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>
> -- 
> Scott  K9MA
>
> k9ma at sdellington.us
>

-- 
Scott  K9MA

k9ma at sdellington.us