Hi Pete,
The "Ideal" blue-banded connectors for RG6 are part number #89-055, and the
black-banded ones for quad shield are #89-056. They both use compression
tool #30-603.
73,
Jim W8ZR
> -----Original Message-----
> From: Topband [mailto:topband-bounces@contesting.com] On Behalf Of Pete
Smith N4ZR
> Sent: Sunday, May 05, 2013 1:39 PM
> To: Topband@contesting.com
> Subject: Re: Topband: Problem with compression F connectors on Quad RG-6
>
> Very interesting, Jim - I have been using Ideal connectors from Home
> Depot, and they have no color band at all (nor do they have decent
> instructions for installing). I will try to find some of the
> black-banded ones (I have red-banded ones for RG-59).
>
> 73, Pete N4ZR
> Check out the Reverse Beacon Network at
> http://reversebeacon.net,
> blog at reversebeacon.blogspot.com.
> For spots, please go to your favorite
> ARC V6 or VE7CC DX cluster node.
>
> On 5/4/2013 11:13 PM, Jim Garland wrote:
> > I'm sure most of you know this already, but there are different
compression
> > F-connectors for ordinary RG6 and for quad-shield RG6. I use "Ideal"
brand
> > connectors with matching compression tool, and there is a color-coded
band
> > for the two types of cables (blue for RG6 and black for quad-shield). It
is
> > not always easy to find the installation instructions, but for quad
shield
> > especially, it is very important to follow the directions so as to make
sure
> > the multiple aluminum foil and braided shields make appropriate contact
at
> > the connector, just as Tom cautions.
> > 73,
> > Jim W8ZR
> >
> >> -----Original Message-----
> >> From: Topband [mailto:topband-bounces@contesting.com] On Behalf Of Tom
> > W8JI
> >> Sent: Saturday, May 04, 2013 6:08 PM
> >> To: Topband@contesting.com
> >> Subject: Re: Topband: Problem with compression F connectors on Quad
RG-6
> >>
> >>> I'm having a repeated weird problem with compression F connectors on
> >>> quad-shield RG6. When I connect a short length (say 4 feet) of cable
to
> >>> my MFJ-259B, I would expect R>650. Instead, when I wiggle the coax,
> >>> occasionally I see the display change to R=0 and X= several hundred
ohms
> >>> at 1.8 MHz. This makes no sense to me - the R implies ashort, but
> > where's
> >>> all the X coming from?
> >> R doesn't come from a short, it comes from no loss resistance, or more
> >> correctly very low loss resistance.
> >>
> >> It sounds like the connector you have is not contacting all the
shields.
> >> This is typical for mismatched connectors and cable, or improperly
> >> manufactured cables. It could be somewhere else also, but I've seen
this
> >> before with quad shield. That's why I avoid it.
> >>
> >>
> >> The problem seems to vary with the same
> >>> connector and different PL-259 to F adapters, which makes me wonder
what
> >>> might be happening inside the adapters, but I can't imagine anything
> >>> producing this result. I have also been unsuccessful in detecting a
> > short
> >>> using a simple DC multimeter.
> >>>
> >> Remember how RF current flows. It flows on the outside of cables,
unless
> > it
> >> has a connection path to the inner shield. If you have cable with Mylar
on
> >> the inside of one or more shield layers, and a connector that only
> > contacts
> >> the outside of the outer shield, the inner shields that carry nearly
all
> > of
> >> the desired transmission line currents will be insulated and isolated
from
> >> the shield at the connector. Every shield has to be contacted at the
> >> connector, or at least the inner shield does.
> >>
> >> This might not be it, but it is a common issue with quad shield. Dual
> > shield
> >> is much more forgiving of connectors. You'll never detect the leakage
in
> >> dual shield in outside runs. If you have nasty common mode problems, a
> >> thicker shield will help. It is also just as simple to add a few dozen
or
> >> few hundred ohms of common mode choking to regular dual shield cables
and
> >> knock down CM ingress to levels that cannot be noticed.
> >>
> >>> I;'m wondering if I should go through my RX antennas and replace all
the
> > F
> >>> connectors and particularly the F to 259 adapters with something else,
> > but
> >>> what? BNCs?
> >> BNC's are worse yet, as a general rule. They rely on spring pressure
for
> > the
> >> shield path. Look into a type match error between the cable you have
and
> > the
> >> connectors, or a connector installation error.
> >>
> >> 73 Tom
> >>
> >> All good topband ops know fine whiskey is a daylight beverage.
> >> _________________
> >> Topband Reflector
> > All good topband ops know fine whiskey is a daylight beverage.
> > _________________
> > Topband Reflector
> >
>
> All good topband ops know fine whiskey is a daylight beverage.
> _________________
> Topband Reflector
All good topband ops know fine whiskey is a daylight beverage.
_________________
Topband Reflector
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