Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 17-09-2013, 06:03   #91
Moderator
 
Pete7's Avatar

Cruisers Forum Supporter

Join Date: Aug 2009
Location: Solent, England
Boat: Moody 31
Posts: 8,560
Images: 14
Re: Amazing Power of Good Antennas

I have to admit I did wonder what Dockhead was doing calling up Solent Coastguard 60+ miles away when France was still clearly in sight. I didn't want to say anything, but I think "you have no chance of getting a reply"

When Solent Coastguard replied it was an OMG moment and have a slice of humble pie.

Looks like I have a trip up the mast this winter and need to locate some high quality coax plus plugs in the UK rather than the normal junk that comes with cheap antennas.

Pete
__________________

__________________
Moody 31 - April Lass
Pete7 is offline   Reply With Quote
Old 24-09-2013, 02:31   #92
Registered User
 
Capt'n Ricko's Avatar

Join Date: Mar 2011
Location: SoCal - Until Oct 2016 - Then Headed South!
Boat: 1984 Cal 35 Mk II - - Hull #85
Posts: 71
Re: Amazing Power of Good Antennas

I am pulling my mast early next year and getting prepared to install for VHF at the masthead. There is no antenna there now. I like the idea of installing the Shakespeare 5400 XP antenna and the heavier cable etc. My question is - since i have purchased a VHF/AIS radio - will I need to have 2 separate antennas for it?

Thanks in advance!

https://www.facebook.com/CaptainRickoAndTheSvSecondWind
__________________

__________________
Capt'n Ricko is offline   Reply With Quote
Old 24-09-2013, 07:58   #93
Senior Cruiser
 
colemj's Avatar

Cruisers Forum Supporter

Join Date: Oct 2005
Location: Presently on US East Coast
Boat: Manta 40 "Reach"
Posts: 10,049
Images: 12
Re: Amazing Power of Good Antennas

If you have the Standard Horizon GX2150, it only needs one antenna.

Mark
__________________
www.svreach.com

You do not need a parachute to skydive. You only need a parachute to skydive twice.
colemj is offline   Reply With Quote
Old 24-09-2013, 12:21   #94
Registered User
 
zboss's Avatar

Join Date: Sep 2011
Location: On a boat
Boat: Cabo Rico 38
Posts: 3,426
Re: Amazing Power of Good Antennas

Quote:
Originally Posted by colemj View Post
If you have the Standard Horizon GX2150, it only needs one antenna.

Mark
Does the GX2150 have the ability to work as a transceiver or just a receiver?
__________________
zboss is offline   Reply With Quote
Old 24-09-2013, 12:26   #95
Senior Cruiser
 
colemj's Avatar

Cruisers Forum Supporter

Join Date: Oct 2005
Location: Presently on US East Coast
Boat: Manta 40 "Reach"
Posts: 10,049
Images: 12
Re: Amazing Power of Good Antennas

Just a receiver. If you add a transceiver, you will need another antenna.

Mark
__________________
www.svreach.com

You do not need a parachute to skydive. You only need a parachute to skydive twice.
colemj is offline   Reply With Quote
Old 24-09-2013, 16:19   #96
Registered User
 
Capt'n Ricko's Avatar

Join Date: Mar 2011
Location: SoCal - Until Oct 2016 - Then Headed South!
Boat: 1984 Cal 35 Mk II - - Hull #85
Posts: 71
Yes, thanks... I have the Standard Horizon GX2150 - ready to install...

And, yes it does not Transmit - only receives...

@DOCKHEAD: What type of mount did you use for the 5400? Do you by chance have a picture of it?

Thanks in advance!

Ricko
__________________
Capt'n Ricko - S/V Tiki Notion (formerly S/V Second Wind) - Getting Ready to Leave!

http://svtikinotion.jimdo.com/
Capt'n Ricko is offline   Reply With Quote
Old 24-09-2013, 16:48   #97
֍֎֍֎֍֎֍֎֍֎

Cruisers Forum Supporter

Join Date: Apr 2006
Posts: 13,042
Re: Amazing Power of Good Antennas

Something that hasn't been mentioned wrt power losses, is that most radios will be optimized for 13.8 volts. So, yes, 25W output when running off engine power, but how much power loss will there be when the radio is only operating off a half-used battery at 12.1 volts? Or less, if the problem is "Who forgot to shut the stereo?"
__________________
hellosailor is offline   Reply With Quote
Old 24-09-2013, 17:31   #98
Registered User
 
transmitterdan's Avatar

Join Date: Oct 2011
Boat: Valiant 42
Posts: 4,023
Quote:
Originally Posted by hellosailor View Post
Something that hasn't been mentioned wrt power losses, is that most radios will be optimized for 13.8 volts. So, yes, 25W output when running off engine power, but how much power loss will there be when the radio is only operating off a half-used battery at 12.1 volts? Or less, if the problem is "Who forgot to shut the stereo?"
It depends on the design of the radio. Practical Sailor reviews radios and reports the power out at lower voltage. Worst case would be about 1dB which is not that significant. But I see some radios installed with too small wire and/or corroded connections making a much worse problem.
__________________
transmitterdan is offline   Reply With Quote
Old 25-09-2013, 14:38   #99
Moderator
 
Dockhead's Avatar

Cruisers Forum Supporter

Join Date: Mar 2009
Location: Cowes (Winter), Baltic (Summer) (the boat!); somewhere in the air (me!)
Boat: Cutter-Rigged Moody 54
Posts: 19,748
Quote:
Originally Posted by hellosailor
Something that hasn't been mentioned wrt power losses, is that most radios will be optimized for 13.8 volts. So, yes, 25W output when running off engine power, but how much power loss will there be when the radio is only operating off a half-used battery at 12.1 volts? Or less, if the problem is "Who forgot to shut the stereo?"
Another advantage of a 24 volt system. My radios work off a dropper which provides constant 13.6 volts when supplied with anything from 20 to 32 volts.
__________________
"Parce que je suis heureux en mer, et peut-Ítre pour sauver mon ame. . . "
Dockhead is offline   Reply With Quote
Old 25-09-2013, 14:39   #100
Moderator
 
Dockhead's Avatar

Cruisers Forum Supporter

Join Date: Mar 2009
Location: Cowes (Winter), Baltic (Summer) (the boat!); somewhere in the air (me!)
Boat: Cutter-Rigged Moody 54
Posts: 19,748
Quote:
Originally Posted by rickusc
Yes, thanks... I have the Standard Horizon GX2150 - ready to install...

And, yes it does not Transmit - only receives...

@DOCKHEAD: What type of mount did you use for the 5400? Do you by chance have a picture of it?

Thanks in advance!

Ricko
Custom made. I'll post when I am near a real computer.
__________________
"Parce que je suis heureux en mer, et peut-Ítre pour sauver mon ame. . . "
Dockhead is offline   Reply With Quote
Old 25-09-2013, 19:21   #101
Registered User
 
zboss's Avatar

Join Date: Sep 2011
Location: On a boat
Boat: Cabo Rico 38
Posts: 3,426
Re: Amazing Power of Good Antennas

Quote:
Originally Posted by Dockhead View Post
Custom made. I'll post when I am near a real computer.
I would be interested in this also.
__________________
zboss is offline   Reply With Quote
Old 25-09-2013, 20:19   #102
Registered User
 
Capt'n Ricko's Avatar

Join Date: Mar 2011
Location: SoCal - Until Oct 2016 - Then Headed South!
Boat: 1984 Cal 35 Mk II - - Hull #85
Posts: 71
Re: Amazing Power of Good Antennas

I also went back and reviewed Practical Sailors article comparing VHF Antennas, and they gave High Marks to Digital Antennas - being very well made:

Marine VHF Antenna Test - Practical Sailor Article

They have a 4 foot - 4.5dB

4 ft AIS Marine Antennas - 4.5dB Gain

Does anyone have any knowledge or experience with Digital?
__________________
Capt'n Ricko is offline   Reply With Quote
Old 25-09-2013, 22:17   #103
֍֎֍֎֍֎֍֎֍֎

Cruisers Forum Supporter

Join Date: Apr 2006
Posts: 13,042
Re: Amazing Power of Good Antennas

dan, I don't have a PS subscription. Was anything rated as 100% at 12 real volts? Or any particular standouts in the crowd?
__________________
hellosailor is offline   Reply With Quote
Old 25-09-2013, 23:37   #104
Marine Service Provider

Join Date: Oct 2011
Posts: 1,205
Re: Amazing Power of Good Antennas

The one thing that I have noticed on this thread, is that nobody mentions noise.

An improperly wired boat full of electrical noise can never be overcome by, everything discussed here.

The old transistor am radio is still one of my best and favorite tools. Those are as rare as hens teeth, so a wand listener from a toning tool is next up.

Lloyd
__________________
FlyingCloud1937 is offline   Reply With Quote
Old 26-09-2013, 01:29   #105
Moderator
 
Dockhead's Avatar

Cruisers Forum Supporter

Join Date: Mar 2009
Location: Cowes (Winter), Baltic (Summer) (the boat!); somewhere in the air (me!)
Boat: Cutter-Rigged Moody 54
Posts: 19,748
Quote:
Originally Posted by FlyingCloud1937
The one thing that I have noticed on this thread, is that nobody mentions noise.

An improperly wired boat full of electrical noise can never be overcome by, everything discussed here.

The old transistor am radio is still one of my best and favorite tools. Those are as rare as hens teeth, so a wand listener from a toning tool is next up.

Lloyd
I've never had any problem with noise on a marine VHF radio. FM modulation is much less subject to noise then AM or SSB, so we'll see when I get the HF radio working whether there is a problem or not, but my VHF is totally free of on board noise, and in general, with the new antenna installation, there is a dramatic reduction of QRM.
__________________

__________________
"Parce que je suis heureux en mer, et peut-Ítre pour sauver mon ame. . . "
Dockhead is offline   Reply With Quote
Reply

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




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 20:30.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.