Cruisers Forum

Join CruisersForum Today

Thread Tools Rate Thread Display Modes
Old 14-02-2012, 04:52   #31
Certifiable Refitter/Senior Wannbe
Wotname's Avatar

Cruisers Forum Supporter

Join Date: Jan 2008
Location: South of 43 S, Australia
Boat: Van DeStat Super Dogger 31'
Posts: 6,324
Re: Virgin at Tuning Masthead VHF Antenna . . .

Hang in there and good luck

All men dream: but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find it was vanity: but the dreamers of the day are dangereous men, for they may act their dreams with open eyes, to make it possible. T.E. Lawrence
Wotname is offline   Reply With Quote
Old 14-02-2012, 04:54   #32
Senior Cruiser

Cruisers Forum Supporter

Join Date: Jul 2006
Location: Chesapeake Region and Maine
Boat: 42' Bob Perry sloop
Posts: 3,928
Images: 4
Re: Virgin at Tuning Masthead VHF Antenna . . .

(Caution: Rant Ahead)

It's designed that way. The WR20/RS87 is a sophisticated network-dependent system which, IMHO, is a very dangerous way to design a VHF intended for use on small boats.

Despite all the hype in Simrad's advertising, I think it's just plain courting disaster to design a VHF radio which is dependent on network operation -- 0183, 2000, SimRad, or whatever.

This is not a step forward. Yeah, it's cute. Imagine...a handheld device which can integrate with all the other (Simrad) electronics on board. And a wireless remote which can do the same. Neat, huh? Definitely. But sensible for use on a small boat? I don't think so. It's a big step backwards in terms of reliability, and since IMHO the VHF transceiver is one of the most important safety devices on a boat ANYTHING which compromises its basic functionality is undesirable.

A standalone VHF with its own wired in microphone and connected directly to good quality coax and a well-situated VHF antenna has been the standard for many years. It's incredibly reliable, even under adverse conditions. Why do ANYTHING to compromise that reliability (including, e.g., installing a "splitter" so you can hook up an AIS receiver)????

Sometimes it's important to strongly resist the siren call to "integrate everything".

(End Rant)

That said, sorry for your problems Akio. In your stead, I'd rip it out straight away and stop fooling with it.


btrayfors is offline   Reply With Quote
Old 15-02-2012, 20:26   #33
Registered User

Join Date: Aug 2011
Location: Rockford WA
Posts: 5
Re: Virgin at Tuning Masthead VHF Antenna . . .

There is probably an Amateur radio club (one or more) near you. If Sydney has an Amateur Radio store(s) ask there. Most store employees are hams

Ask if someone with VHF (2m) knowledge would help you in checking your new unstallation.

To seal the connectors once everything is working, I've always used plastic electrical tape spiral wrapped at least 6 inches followed by two coats of liquid electrical tape. The electrical tape provides some re inforcement at the cable /coax junction and the liquid tape gives a watertight seal.

When I am checking out a new VHF installation for someone, I use a 1 foot jumper from radio to one side of a Bird Wattmeter ( fancy SWR that reads in watts forward and reflected) then the coax from antenna to the 2nd Bird connector. SWR meter hooks up exactly same way. The Bird, set for forward watts, measures the watts from radio to antenna (less cable losses) as well as the SWR.

If you have questions, email me Phil WA7JCE
PhilE is offline   Reply With Quote
Old 22-11-2013, 12:05   #34
Registered User
typhoon's Avatar

Join Date: Feb 2007
Location: Toronto Canada
Boat: Bristol 45.5
Posts: 871
Images: 1
Re: Virgin at Tuning Masthead VHF Antenna . . .

Seems like the WR20 is nothing but a nusance, I was thinking of getting one, I like the Idea of steering from the bow occasionaly, may come in handy .

Anybody get one working properly ??

I have a NSS7 controlling an AC42 autopilot.

typhoon is online now   Reply With Quote
Old 22-11-2013, 14:04   #35
Registered User

Join Date: Jul 2013
Posts: 126
Originally Posted by akio.kanemoto View Post

What about my external cellphone/3G antenna cable?
Describe your external 3G antenna/ cable setup. The length of the type of cable you have is a non issue on VHF, but very important at cellular frequencies. Your cellphone operates on frequencies as high as 2.1GHz. That RG213 has 2.5dB loss per 100' at VHF freq's, fizzles to nearly 12dB at 2.1GHz! LMR400 is about 1/2 that at 6.6dB, but that's a vast improvement.

People get on here all the time and I argue with them because they focus on insignificant cable losses, connector losses, etc at VHF frequencies. All of that can quickly become significant at cellular frequencies.

Basically, you want as short of a run of coax as is practical. You don't want a bunch of inline connectors, but sometimes a thin jumper is necessary. The antenna itself should be as high as you can get it with appropriate cable. The masthead would be awesome, but not if you're feeding it with RG58. Use quality connectors designed to operate at the highest frequencies, not UHF (pl259) connectors.

If you can describe the installation, i'd be happy to offer any suggestions that i feel might help you.
El Rubio is offline   Reply With Quote
Old 22-11-2013, 14:25   #36
Senior Cruiser
DeepFrz's Avatar

Cruisers Forum Supporter

Join Date: Mar 2006
Location: Winnipeg
Boat: None at this time
Posts: 7,060
Re: Virgin at Tuning Masthead VHF Antenna . . .

El Rubio, this is an old thread that someone has opened up again.
The Blue Dot Campaign. This Changes Everything.
DeepFrz is online now   Reply With Quote
Old 22-11-2013, 15:22   #37
Registered User

Join Date: Jul 2013
Posts: 126
Re: Virgin at Tuning Masthead VHF Antenna . . .

I posted from my iphone earlier and didn't notice it was last year - ha...move along, nothing to see here

El Rubio is offline   Reply With Quote

antenna, vhf

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
AIS and VHF Performance ibexx Marine Electronics 59 01-07-2016 14:41
Catamarans - Current Market Situation Dragon Lady Multihull Sailboats 505 08-07-2012 17:06
FM Antenna Setup silverp40 Marine Electronics 16 26-09-2011 13:55
For Sale or Trade: Columbia 8.3 Meter (27.3') Masthead Sloop offline Classifieds Archive 4 11-08-2011 06:04

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 12:16.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.