[C38] Symetrical Spinnakers
les
hlhowell at pacbell.net
Mon Aug 6 14:29:13 EDT 2012
Hi, guys and gals,
Just wanted to add an old Navy guy's input...
The PL259 connectors are two parts, the screw down shell, and the
casing with the insulator and center conductor. Remove the shell and
slide it down the coax. I sometimes use a bit of tape or tie a string
around the coax to make sure it keeps out of the way of my soldering.
Measure the coax back about 3/4" and cut away the insulation and braid
and then remove the insulation from the center conductor. Remove about
1/2" of the outer insulation, leaving the braid intact. Carefully
thread the braid into the connector and make sure the center conductor
protrudes from the center pin of the connector. Check to see that you
can see the braid inside the holes of the outer portion of the
connector. Solder the center conductor. Carefully solder the shield
(the braid) in each of the holes. They are spaced so that all the wires
in the braid will be held by solder.
Make sure the joint is shiny. A dull look to the solder means it is
not well done and will probably have flux still embedded in the solder.
But be careful not to overheat the coax, as the neoprene will swell and
change dimension if too hot. Buy a couple of extra connectors and a
foot or two of coax and practice first before tackling the good stuff if
this is your first attempt. Use a soldering iron on the center cable,
about 25 or 30 watts. You can use a soldering gun if you are careful on
the insulation.
After soldering, clean the connector very well. In the past you could
use alcohol, but some fluxes today will not dissolve in alcohol, so read
the solder and check the manufacturers spec for cleaning.
If you do not use the connection right away, clean it again before
installation. This second cleaning can be alcohol.
Install the connector. If using a barrel connector, install both
cables, Use a bit of silicon to seal the area where the insulation meets
the connector. Using self sealing tape, start about 1-2" up the cable
from the connector, and wrap smoothly stretching the wrap as you go.
The stretch breaks microcapsuls in the tape and causes the self healing
attachment of the sealing tape. Wrap to 1-2" beyond the second
connector on the second coax. A connection made this way will last up
to 5 years in tropical conditions. Longer in the US.
Sealing the cable is mandatory if it is to work well at radar
frequencies. The cable is typically air insulated, using a sort of
neoprene tube with a spiral of neoprene around the wire to support it in
the tube to improve its characteristics. If it is not sealed moisture
will get in and reduce the range of the radar to next to nothing.
This is not rocket science, but attention to detail will provide the
best results.
Regards,
Les H
On Fri, 2012-08-03 at 16:05 -0400, tdtron at earthlink.net wrote:
> Hello Joe,
>
> You don't have to spice the coax. Depending on the type of coax,
> there are couplers and barrel connectors to match. For instance, on
> RG58 or similar coax cables, you put a PL259 on each side of the cut
> and then connect both connectors to a female barrel connector which
> may be a SO238. I am working on memory here but any ham radio store
> should be able to help you if you identify the coax.
>
> Installing solder type PL259 connectors is a pain but don't be tempted
> to use the solderless type, they invite trouble on boats.
>
> They should also offer sealing putty also to wrap the connection for a
> water tight connection. Even a well wrapped connection using quality
> electrical tape will work. I often use WD40 on the actual connectors
> before I connect them and then clean the outsides for a good bond with
> either the putty or tape.
>
> This is more difficult than a conventional splice but using these
> connectors allows easy removal in the future if needed and also keeps
> the inductance of the cable uniform for best conductivity and minimum
> loss at the high frequencies of radar.
>
> Tom Troncalli
>
>
>
> ----- Original Message -----
> From: Joseph Launie
> To: listserve at catalina38.org
> Sent: 8/3/2012 3:23:01 PM
> Subject: Re: [C38] Symetrical Spinnakers
>
>
> Tom,
> Thank you - I like the idea of shimming to a smaller
> diameter aluminium post since mine is stainless. It would be
> very difficult to unthread the co-ax so I wonder if I can cut
> and splice it - voids waranty but that is long gone anyway.
> Joe
> On 8/3/2012 7:18 AM, tdtron at earthlink.net wrote:
>
> > Hello Joe,
> >
> > What is the Inside diameter 6' post? If you can find out
> > that dimension and locate a piece of similar material but
> > smaller with an outside diameter of the inside diameter of
> > the standing 6' post, you could easily telescope the two
> > pieces together making the post mount any height you want.
> >
> > As you know, the strains are less higher up the post vs. the
> > lower section so you will not lose any strength by using a
> > smaller diameter post extension and your wind resistance
> > will be less also than a uniform diameter post to the new
> > height.
> >
> > I have made similar projects and finding exact size tubes
> > that have telescoping dimension properties is often
> > difficult but the radio industry has sources for telescoping
> > materials. If your existing post does not have a
> > corresponding smaller post material that is compatible, you
> > can shim the smaller post with something like plastic tape
> > (not duct tape) to take out the dimensional differences if
> > they are small. I have also used the shim method to
> > transition from steel to aluminum with good results since
> > the materials are isolated by the dielectric qualities of
> > the plastic tape. Any ham radio outlet should be able
> > to give you resources to find the materials you need to make
> > a post extension. This is a regular problem with building
> > radio antennas and towers.
> >
> > If this procedure of using an inside post to modify the
> > height of your existing post will work for you, you may be
> > able to leave the existing post mounted to your boat which
> > will save a lot of time.
> >
> > I wish you were closer to me so I could help you with this
> > project. I have a fairly complete weld shop and machine
> > shop so that I can still practice my abilities of being a
> > technical blue collar nerd wannabe.
> >
> > Good luck,
> > Tom Troncalli
> >
> >
> >
> >
> >
> > ----- Original Message -----
> > From: Joseph Launie
> > To: listserve at catalina38.org
> > Sent: 8/3/2012 3:01:36 AM
> > Subject: Re: [C38] Symetrical Spinnakers
> >
> >
> > Steve,
> > Thanks - now how do I go from a 6 foot post to a
> > 10 foot one? I have lots of xtra cable. I guess I
> > have to discard this one and build the ten foot out
> > of aluminum. It would be way easier if I could cut
> > the co-ax. Joe
> > On 8/2/2012 10:22 PM, Steve Smolinske wrote:
> >
> > > Joe,
> > >
> > > When I did my post I did the calculations so that
> > > the bowman assuming he is six feet tall would be
> > > missed by the beam, our post is 10 tall and
> > > mounted so the base is where the fuel line vent
> > > use to be. If I remember correctly the angle off
> > > the the radome for the beam is 2-2.5 degrees
> > >
> > > Steve
> > >
> > > From: listserve-bounces at catalina38.org
> > > [mailto:listserve-bounces at catalina38.org] On
> > > Behalf Of Joseph Launie
> > > Sent: Tuesday, July 31, 2012 10:14 AM
> > > To: listserve at catalina38.org
> > > Subject: Re: [C38] Symetrical Spinnakers
> > >
> > >
> > > we have another rigging issue.We let the idiot
> > > "rigger" for the local J boat dealer install our
> > > radar. He put it on a post 6 feet above the deck.
> > > We are afraid to use it for fear of radiation
> > > damage. Any thoughts? Joe
> > >
> > > On 7/31/2012 9:39 AM, William Knowles wrote:
> > >
> > >
> > > Jay are you using the external spin block
> > > or an internal one say your spare jib
> > > haylard, that could be a problem.
> > >
> > >
> > > Bill
> > >
> > > On Tue, Jul 31, 2012 at 11:24 AM, Donald
> > > Strong <drstrong at ucdavis.edu> wrote:
> > >
> > >
> > > Jay: I feel for you man. We have had lots
> > > of spinny drama. We always roller furl the
> > > jib when flying
> > > spinnaker. The rest of your questions are
> > > beyond my experience.
> > > Don
> > >
> > > >
> > > > ------_=_NextPart_002_01CD6EB3.1776DEB4
> > > > Content-Type: text/plain;
> > > > charset="us-ascii"
> > > > Content-Transfer-Encoding:
> > > quoted-printable
> > > >
> > > > Hello All,
> > > >
> > > >
> > > >
> > > > We flew our 0.75 oz spinnaker for the
> > > first time yesterday during a
> > > > family sail and have a couple of
> > > questions for the group.
> > > >
> > > >
> > > >
> > > > 1. During the douse
> > > the spin halyard got stuck and
> > > > appeared to be caught on the roller
> > > furling gear near the masthead. Is
> > > > this common? Also, is it normal to
> > > roller furl the jib when using a
> > > > symmetrical chute or do you really need
> > > to drop it on deck? I race on a
> > > > Serendipity 43 and Swan 51 with a deck
> > > sweeper jibs that are dropped
> > > > when flying a chute, and on a J-105 that
> > > rolls the jib while flying an
> > > > asymmetrical, so having a roller furler
> > > and a symmetrical chute is new
> > > > to us.
> > > >
> > > > 2. While working to
> > > get the chute down we added a few
> > > > new tears to the many that were there
> > > previously so was going to put out
> > > > a call to anyone who might have a used
> > > symmetrical spinnaker(s)
> > > > (0.5-0.75oz) laying around that they are
> > > not using. Will pay a
> > > > reasonable price plus shipping!
> > > >
> > > > 3. And lastly, does
> > > anyone who uses very light
> > > > spinnaker sheets in light air have a
> > > preference for light weight
> > > > shackles. The plastic Lewmar ones we
> > > use on the Serendipity tend to
> > > > open up under load and I thought one of
> > > you may have a preferable
> > > > option?? &n! bsp;Or maybe we'll just tie
> > > on light line!
> > > >
> > > >
> > > >
> > > > Thanks much!
> > > >
> > > >
> > > >
> > > > Jay & Dorothy Sorensen
> > > >
> > > > C-38 #311 Broad Reach
> > > >
> > > > San Diego, CA
> > > >
> > > >
> > > >
> > > >
> > > > ------_=_NextPart_002_01CD6EB3.1776DEB4
> > > > Content-Type: text/html;
> > > > charset="us-ascii"
> > > > Content-Transfer-Encoding:
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> > > > <div class=Section1>
> > > >
> > > > <p class=MsoNormal><font size=2
> > > face=Arial><span
> > > > style='font-size:10.0pt;
> > > > font-family:Arial'>Hello
> > > All,<o:p></o:p></span></font></p>
> > > >
> > > > <p class=MsoNormal><font size=2
> > > face=Arial><span
> > > > style='font-size:10.0pt;
> > > >
> > > font-family:Arial'><o:p> </o:p></span></font></p>
> > > >
> > > > <p class=MsoNormal><font size=2
> > > face=Arial><span
> > > > style='font-size:10.0pt;
> > > > font-family:Arial'>We flew our 0.75 oz
> > > spinnaker for the first time
> > > > yesterday
> > > > during a family sail and have a couple
> > > of questions for the
> > > > group.<o:p></o:p></span></font></p>
> > > >
> > > > <p c! lass=MsoNormal><font size=2
> > > face=Arial><span
> > > > style='font-size:10.0pt;
> > > >
> > > font-family:Arial'><o:p> </o:p></span></font></p>
> > > >
> > > > <p class=MsoNormal
> > > >
> > > style='margin-left:.75in;text-indent:-.5in;mso-list:l0 level1
> > > > lfo1'><![if !supportLists]><font
> > > > size=2 face=Arial><span
> > > >
> > > style='font-size:10.0pt;font-family:Arial'><span
> > > > style='mso-list:Ignore'>1.<font size=1
> > > face="Times New Roman"><span
> > > > style='font:7.0pt "Times New
> > > > Roman"'>
> > > >
> > > </span></font></span></span></font><![endif]><font
> > > > size=2 face=Arial><span
> > > >
> > > style='font-size:10.0pt;font-family:Arial'>During the douse the spin
> > > > halyard
> > > > got stuck and appeared to be caught on
> > > the roller furling gear near the
> > > > masthead. Is this common? Also, is it
> > > normal to roller furl
> > > > the jib
> > > > when using a symmetrical chute or do you
> > > really need to drop it on deck?
> > > > I
> > > > race on a Serendipity 43 and Swan 51
> > > with a deck sweeper jibs that are
> > > > dropped
> > > > when flying a chute, and on a J-105 that
> > > rolls the jib while flying an
> > > > asymmetrical, so having a roller furler
> > > and a symmetrical chute is new to
> > > > us.<o:p></o:p></span></font></p>
> > > >
> > > > <p class=MsoNormal
> > > >
> > > style='margin-left:.75in;text-indent:-.5in;mso-list:l0 level1
> > > > lfo1'><![if !supportLists]><font
> > > > size=2 face=Arial><span
> > > >
> > > style='font-size:10.0pt;font-family:Arial'><span
> > > > style='mso-list:Ignore'>2.<font size=1
> > > face="Times New Roman"><span
> > > > style='font:7.0pt "Times New
> > > > Roman"'> !
> > > >
> > > </span></font></span></span></font><![endif]><font
> > > > size=2 face=Arial><span
> > > >
> > > style='font-size:10.0pt;font-family:Arial'>While working to get the chute
> > > > down
> > > > we added a few new tears to the many
> > > that were there previously so was
> > > > going to
> > > > put out a call to anyone who might have
> > > a used symmetrical spinnaker(s)
> > > > (0.5-0.75oz) laying around that they are
> > > not using. Will pay a
> > > > reasonable
> > > > price plus
> > > shipping!<o:p></o:p></span></font></p>
> > > >
> > > > <p class=MsoNormal
> > > >
> > > style='margin-left:.75in;text-indent:-.5in;mso-list:l0 level1
> > > > lfo1'><![if !supportLists]><font
> > > > size=2 face=Arial><span
> > > >
> > > style='font-size:10.0pt;font-family:Arial'><span
> > > > style='mso-list:Ignore'>3.<font size=1
> > > face="Times New Roman"><span
> > > > style='font:7.0pt "Times New
> > > > Roman"'>
> > > >
> > > </span></font></span></span></font><![endif]><font
> > > > size=2 face=Arial><span
> > > >
> > > style='font-size:10.0pt;font-family:Arial'>And lastly, does anyone who
> > > > uses
> > > > very light spinnaker sheets in light air
> > > have a preference for light
> > > > weight
> > > > shackles. The plastic Lewmar ones we
> > > use on the Serendipity tend to
> > > > open
> > > > up under load and I thought one of you
> > > may have a preferable
> > > > option?? Or
> > > > maybe well just tie on light
> > > > line!<o:p></o:p></span></font></p>
> > > >
> > > > <p class=MsoNormal><font size=2
> > > face=Arial><span
> > > > style='font-size:10.0pt;
> > > >
> > > font-family:Arial'><o:p> </o:p></span></font></p>
> > > >
> > > > <p class=MsoNormal><font size=2
> > > face=Arial><span
> > > > style='font-size! :10.0pt;
> > > > font-family:Arial'>Thanks
> > > > much!<o:p></o:p></span></font></p>
> > > >
> > > > <p class=MsoNormal><font size=2
> > > face=Arial><span
> > > > style='font-size:10.0pt;
> > > >
> > > font-family:Arial'><o:p> </o:p></span></font></p>
> > > >
> > > > <p class=MsoNormal><font size=2
> > > face=Arial><span
> > > > style='font-size:10.0pt;
> > > > font-family:Arial'>Jay & Dorothy
> > > > Sorensen<o:p></o:p></span></font></p>
> > > >
> > > > <p class=MsoNormal><font size=2
> > > face=Arial><span
> > > > style='font-size:10.0pt;
> > > > font-family:Arial'>C-38 #311 Broad
> > > > Reach<o:p></o:p></span></font></p>
> > > >
> > > > <p class=MsoNormal><st1:place
> > > w:st="on"><st1:City
> > > > w:st="on"><font size=2
> > > > face=Arial><span
> > > style='font-size:10.0pt;font-family:Arial'>San
> > > > Diego</span></font></st1:City><font
> > > > size=2 face=Arial><span
> > > style='font-size:10.0pt;font-family:Arial'>,
> > > > <st1:State
> > > >
> > > >
> > > w:st="on">CA</st1:State></span></font></st1:place><o:p></o:p></p>
> > > >
> > > > <p class=MsoNormal><font size=3
> > > face="Times New Roman"><span
> > > > style='font-size:
> > > > 12.0pt'><o:p> </o:p></span></font></p>
> > > >
> > > > </div>
> > > >
> > > > </body>
> > > >
> > > > </html>
> > > >
> > > >
> > > ------_=_NextPart_002_01CD6EB3.1776DEB4--
> > > >
> > >
> > >
> > > _______________________________________________
> > > Listserve mailing list
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> > >
> > >
> > >
> > >
> > > --
> > > W H Knowles
> > >
> > >
> > >
> > >
> > >
> > > _______________________________________________
> > > Listserve mailing list
> > > Listserve at catalina38.org
> > > http://catalina38.org/mailman/listinfo/listserve_catalina38.org
> > >
> > >
> > >
> > > _______________________________________________
> > > Listserve mailing list
> > > Listserve at catalina38.org
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> >
> >
> >
> >
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>
>
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