Cruisers Forum
 


Join CruisersForum Today

Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 28-02-2017, 15:18   #1
Registered User

Join Date: Jun 2015
Location: Juneau, AK
Boat: Fraser 41
Posts: 71
Where to install SSB unit in my boat?

Hey guys, Travis here again.

I'm looking for some advice on placement of an SSB unit on our boat and would like to pick the brains of those who are far more knowledgeable than myself. We have picked up a Icom 710RT with the control head at the nav station, the tuner under the backstay, and now the placement of where to put the main radio body has us (wife and I) scratching our heads. The best spot we've found is abeam our mast in a large cabinet, but having it there, we would have to run the cable to the tuner and the power cables side by side for about 15' before they go separate ways. Should we rethink this?
__________________

tdalke is offline   Reply With Quote
Old 28-02-2017, 16:03   #2
F10
Registered User

Join Date: Feb 2016
Location: Hawaii
Boat: S&S 34
Posts: 109
Re: Where to install SSB unit in my boat?

15 foot is far, greater the distance the greater the power loss, not a big deal on transmit, but it will mean a weaker receive signal. You can use a low loss coax, RG8U I think it is called. Also, you want to keep the 12v DC power cable to the transmitter very short, look at the icom manual for you radio as they have good instructions.Manual Downloads | Icom Inc
__________________

F10 is offline   Reply With Quote
Old 01-03-2017, 10:25   #3
Registered User
 
leftbrainstuff's Avatar

Join Date: May 2011
Location: San Francisco and Australia
Boat: Liberty 458
Posts: 2,180
Re: Where to install SSB unit in my boat?

Place the main unit as close to the power source as possible. Follow the manual rrcommendations.

Only use good coax and connectors. RG8 and N type connectors. Add ferrites as needed.

Most important is your ground plane and power supply.
leftbrainstuff is offline   Reply With Quote
Old 01-03-2017, 11:40   #4
Moderator
 
roverhi's Avatar

Join Date: Aug 2005
Location: Kona, Hawaii, Carlsbad, CA
Boat: 1969 Pearson 35 #108 & 1976 Sabre 28
Posts: 6,752
Send a message via Yahoo to roverhi
Re: Where to install SSB unit in my boat?

If you plan on switching frequencies or using it on the Ham bands, you'll want the radio where you can easily work the controls. If you have a chart table with or without a seat, that's the obvious place to mount the radio.
__________________
Peter O.
'Ae'a, Pearson 35
'Ms American Pie', Sabre 28 Mark II
roverhi is offline   Reply With Quote
Old 01-03-2017, 11:49   #5
Now on the Dark Side: Stink Potter.
 
CSY Man's Avatar

Cruisers Forum Supporter

Join Date: Aug 2003
Location: Ft. Lauderdale
Boat: 2001 Albin 28TE.
Posts: 3,750
Images: 120
Re: Where to install SSB unit in my boat?

I had the same setup and bolted the radio to the underside of the chart table with the control head next to other radios just below the 12 v panel behind the chart table.
Worked great, lasted a long time.
Click around on my pics and you may see the nav station
__________________
Life is sexually transmitted
CSY Man is offline   Reply With Quote
Old 01-03-2017, 12:07   #6
Moderator
 
Jim Cate's Avatar

Join Date: May 2008
Location: cruising SW Pacific
Boat: Jon Sayer 1-off 46 ft fract rig sloop strip plank in W Red Cedar
Posts: 14,841
Re: Where to install SSB unit in my boat?

I think you will find that at HF (3-30 MHz), co-ax losses and connector losses are negligible. Voltage drop in the power cables can be significant and will affect performance. The length of the ground lead from tuner to whatever ground system you choose is also important and should be minimized.

Thus, one should minimize power lead length and find a place for the tuner that minimizes the below deck length of the output wire to the antenna AND minimizes the length of the ground connection. The co-ax length is far less important

Jim
__________________
Jim and Ann s/v Insatiable II now northbound, lying in Moreton Bay pending medico appointments.
Jim Cate is online now   Reply With Quote
Old 01-03-2017, 12:28   #7
Registered User

Join Date: Sep 2012
Posts: 5,553
Re: Where to install SSB unit in my boat?

Jim points are all good. ICOM supplies a cable for their SSB's that is 6 feet long and you can buy an optional one up to 9 feet I believe, they don't recommend anything longer between the radio head and the radio chassis however we used a 12 foot extention and still get very good performance from ours.
robert sailor is offline   Reply With Quote
Old 01-03-2017, 20:27   #8
Registered User

Join Date: Jun 2015
Location: Juneau, AK
Boat: Fraser 41
Posts: 71
Re: Where to install SSB unit in my boat?

Thanks guys for all the input. I'll be looking to put it closer to the batteries. Now for the real adventure of making a spot!
tdalke is offline   Reply With Quote
Old 01-03-2017, 20:49   #9
Registered User

Join Date: Jun 2015
Location: Juneau, AK
Boat: Fraser 41
Posts: 71
Re: Where to install SSB unit in my boat?

Does it matter if the transceiver is mounted horizontally or vertically? The manual says nothing about the mounting it in any particular way besides the distance from the batteries shouldn't extend beyond 20'.
tdalke is offline   Reply With Quote
Old 09-03-2017, 18:30   #10
Registered User

Join Date: Jan 2005
Location: Seattle area (Bremerton)
Boat: C&C Landfall 39 center cockpit "Anahita"
Posts: 1,076
Images: 6
Re: Where to install SSB unit in my boat?

Place the transceiver wherever it is convenient the cable length is irrelevant to the tuner only from the tuner to the drive point of the antenna is important of course the tuner ground length and connection point is important
__________________
"I don't think there'll be a return journey Mr. Frodo". Samwise Gamgee
Rick is offline   Reply With Quote
Old 09-03-2017, 18:31   #11
Registered User

Join Date: Jan 2005
Location: Seattle area (Bremerton)
Boat: C&C Landfall 39 center cockpit "Anahita"
Posts: 1,076
Images: 6
Re: Where to install SSB unit in my boat?

Do not power the transceiver from your electrical panel go directly from the battery through a fuse with an appropriate size cable for the length of the Run to be unit
__________________
"I don't think there'll be a return journey Mr. Frodo". Samwise Gamgee
Rick is offline   Reply With Quote
Old 09-03-2017, 18:32   #12
Registered User

Join Date: Jan 2005
Location: Seattle area (Bremerton)
Boat: C&C Landfall 39 center cockpit "Anahita"
Posts: 1,076
Images: 6
Re: Where to install SSB unit in my boat?

Orientation of the transceiver is irrelevant upside down is just fine or otherwise
__________________
"I don't think there'll be a return journey Mr. Frodo". Samwise Gamgee
Rick is offline   Reply With Quote
Old 09-03-2017, 18:34   #13
Registered User

Join Date: Jan 2005
Location: Seattle area (Bremerton)
Boat: C&C Landfall 39 center cockpit "Anahita"
Posts: 1,076
Images: 6
Re: Where to install SSB unit in my boat?

If you use an SWR meter on the transceiver you might want to make the coax connection to the tuner a half of wavelength at the most critical frequency of use for the SWR to be valid even if the cable becomes much longer to do so
__________________
"I don't think there'll be a return journey Mr. Frodo". Samwise Gamgee
Rick is offline   Reply With Quote
Old 09-03-2017, 18:36   #14
Registered User

Join Date: Jan 2005
Location: Seattle area (Bremerton)
Boat: C&C Landfall 39 center cockpit "Anahita"
Posts: 1,076
Images: 6
Re: Where to install SSB unit in my boat?

Obviously if the critical frequency is at 40 meters a half wavelength there will work just fine at 20 meters at least in the ham bands
__________________
"I don't think there'll be a return journey Mr. Frodo". Samwise Gamgee
Rick is offline   Reply With Quote
Old 09-03-2017, 19:45   #15
Registered User

Join Date: Dec 2016
Posts: 738
Re: Where to install SSB unit in my boat?

I found the perfect spot for the main unit was in a corner of the under-settee locker.

But then... I found I had a moral objection to putting a piece of potentially critical electronic safety equipment below the water line. So I screwed it to the underside of the chart table. This required moving the fluxgate compass a safe distance away.
__________________

toddster8 is offline   Reply With Quote
Reply

Tags
boat, ssb

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Marine SSB Stuff (how-to better use / proeprly-install SSB, & troubleshoot RFI, etc.) ka4wja Marine Electronics 90 Today 06:53
For Sale: Benmar Power unit, course keeper 210 binnacle and raytheon Radar unit Bryan Hendrix Classifieds Archive 5 21-12-2013 14:53
autopilot linear drive unit install cal 39 guy Electrical: Batteries, Generators & Solar 4 19-05-2013 15:03
For Sale: Harken MK3 unit ONE roller furling unit megayachtec Classifieds Archive 3 23-06-2012 21:45



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 15:06.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.