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 Catalina/Capri 25/250 Sailor's Forums
 Catalina 250 Specific Forum
 Mast Head V.H.F Antenna		  New Topic  Topic Locked
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Bob Jack
1st Mate

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USA
58 Posts
Initially Posted - 12/09/2006 :  21:14:46  Show Profile
Ive just signed on the bottom line for a dealer demo 250 in Florida. I will be keeping her on a lift and since the mast will be up all the time,I want a permanent mast head V.H.F. antenna, for range. The dealer is supplying the coax fed through the mast but after it comes out the bottom...it's up to me.
Any ideas for feeding it down to the cabin (water tightness is a biggy) will be appreciated.
Lord knows I hate drilling a hole into a brand new cabin top...
Bob
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frog0911
Master Marine Consultant

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USA
1349 Posts
Response Posted - 12/09/2006 :  21:38:00  Show Profile
Bob, here is a thread from the archives which pretty well covers it. My mast stays up all the time so I did not cut the cable and install the pl259 or so239 connectors. The trailer sailors have to use Paul's method since they up/down the mast when they trailer to a new cruising area.

http://catalina-capri-25s.org/forum/topic.asp?TOPIC_ID=9484& SearchTerms=masthead,antenna
Edited by - frog0911 on 12/09/2006 21:43:02
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Rich G
Navigator

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226 Posts
Response Posted - 12/09/2006 :  21:58:47  Show Profile
I put one of these on:



It does seem wrong to be drilling holes in a boat, but sometimes you just got to do it. Even if you PLAN on leaving your mast up all the time, it seems like a mistake not to provide some kind of break in the electrical and antenna wires at the deck. The cable clam keeps the connections inside the cabin and away from the corrosive elements. It the winter, when I disconnect the antenna cable and unstep the mast, I replace the coax in the clam with a scrap of coax. It works great.

Oh, and by the way, no leaks.

Here's the link to the appropriate page at defender:

http://www.defender.com/product.jsp?path=-1|328|49758|112306|316467& id=28629
Edited by - Rich G on 12/09/2006 23:40:07
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Rich G
Navigator

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226 Posts
Response Posted - 12/09/2006 :  23:42:35  Show Profile
<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Rich G</i>
<br />
Here's the link to the appropriate page at defender:

http://www.defender.com/product.jsp?path=-1|328|49758|112306|316467& id=28629
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">

Not sure why the link isn't taking. you can either cut and paste the entire url above or you can go to www.defender.com and do a search for "Cable Clam."
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britinusa
Web Editor

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USA
5404 Posts
Response Posted - 12/10/2006 :  08:06:49  Show Profile  Visit britinusa's Homepage
Rich,
The URL is long and so gets a break in it hence it does not show correctly when you surround it with (url)http://www.defender.com/product.jsp?path=-1|328|49758|112306|316467&id=28629(/url) (I used braces here in place of square braces just to show the issue.

[url="http://www.defender.com/product.jsp?path=-1|328|49758|112306|316467&id=28629"]this does work though[/url]

I used the method (url="PutReallyLongURLhereBetweenDoubleQuotesToPreventTheLineBreakBeingRecognizedAsAtextBreak")put link text here(/url) again I'm using braces() in place of square braces[ ] to demonstrate.
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Nautiduck
Master Marine Consultant

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USA
3704 Posts
Response Posted - 12/10/2006 :  19:55:35  Show Profile
I use the same one as Rich. Works great. Requires 3/4 hole which I did with a hole saw. You will need a hole from the cabin and one from the deck. The area by the mast is hollow si there is a place to run your cable. Be careful though not to drill through the wiring cable that feeds your mast connector. It is in that cavity. Using this method allows you to have the VHF connections inside and out of the weather.
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britinusa
Web Editor

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USA
5404 Posts
Response Posted - 12/11/2006 :  07:14:10  Show Profile  Visit britinusa's Homepage
I was able to remove the stbd cabin light and gain access to the area where the cable came in, then I routed the coax along the transverse channel, down to the hull/top join and then aft to the electrical panel area. Finally I fished it up to the light panel above the electrical panel. I replaced the fiberglass light panel with thin marine ply and made holes with grommets for both the coax, and the power cables. Recently I added the link from the GPS so that we could use the caller id feature.

Paul
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Nautiduck
Master Marine Consultant

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USA
3704 Posts
Response Posted - 12/11/2006 :  12:50:54  Show Profile
I like the routing that Paul did better then the PO did on my C250. On mine the coax comes out of the "transverse channel" cavity near the mast support and then into the mast support through a drilled hole. It emerges at the floor and then runs across the floor to the port seat area and then down and under. I am tempted to reroute the way Paul did and to have the coax connection actually housed in the "transverse channel." The connector that Rich illustrated would allow this. I like this approach because it will move the connection inside the transverse channel and out of the weather.

Paul, have you got a photo of the coax emerging from the transverse channel and to the hull joint section?
Edited by - Nautiduck on 12/11/2006 12:52:55
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britinusa
Web Editor

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USA
5404 Posts
Response Posted - 12/11/2006 :  22:12:04  Show Profile  Visit britinusa's Homepage
Sorry Randy, can't find any pics. It was a trick getting things through that area of the cabin roof. I did fish a line through each segment however, it's still there just in case I needed to pull another wire through for some future toy, perhaps a radar antenna, or masthead TV antenna

Paul
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.