Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 15-10-2017, 13:53   #1
Registered User

Join Date: Apr 2014
Boat: Dufour 40 E, 12 m
Posts: 34
New ICM M-802 and antenna length

I have installed a new ICOM M-802 with ATU-140, Kiss ground, a separate battery, separate GPS, twisted large sized feed lines, installed chokes as advised, all according the ICOM Handbook. Antenna on my S/Y is the backstay. Receipt is good and clear. Antenna length 13 m (43 ft) between isolators on the backstay + 4,7 m (15 ft) GTO-15 cable to the ATU. Shorter is not possible. Could that be a problem?
results: @ position 34 N - 22 E (Med.) good receipt @ 13 270 KHz and 15 298 kHz (I think it was a Chinese transmitter in french language) - 5 970 kHz - 7 295 - 7 268 kHz - 7 295 kHz - 8 xxx (Monaco) - 2663 kHz. All just after sunset around 19:00 UTC. I believe not much disturbances, since I # m a new comer in SSB.
I have appr. licenses. But I could not pick-up any signals or tweets between other yachtsmen on the SSB. But I have no experience at all.
It is difficult to find out what were the transmitters. Can somebody advise me if that is good or should I install and test the antenna signals?.
What tests would you advise, because it is not easy to find other yachtmen on a unknown freuquency?
__________________

__________________
Sea Angel1 is offline   Reply With Quote
Old 15-10-2017, 14:50   #2
Marine Service Provider
 
SV THIRD DAY's Avatar

Cruisers Forum Supporter

Join Date: Aug 2006
Location: La Paz, Mexico
Boat: 1978 Hudson Force 50 Ketch
Posts: 3,694
Re: New ICM M-802 and antenna length

I would highly recommend this M802 online Webinar coming up.

https://events-na5.adobeconnect.com/...-id=1828738152
__________________

__________________
Rich Boren owner of:
Cruise RO Water High Output Water
Technautic CoolBlue Refrigeration
La Paz Cruisers Supply and Yacht Management
SV THIRD DAY is offline   Reply With Quote
Old 16-10-2017, 22:24   #3
Registered User

Join Date: Nov 2013
Location: Presently Seattle
Boat: Krogen39
Posts: 26
Re: New ICM M-802 and antenna length

This book is worth its weight in gold for both installing, troubleshooting, and programming the M802:
Buy Books

Terry's Website is great, the ICOM M802 section has some nice stuff:
IC M802


Quote:
Originally Posted by Sea Angel1 View Post
I have installed a new ICOM M-802 with ATU-140, Kiss ground, a separate battery, separate GPS, twisted large sized feed lines, installed chokes as advised, all according the ICOM Handbook. Antenna on my S/Y is the backstay................What tests would you advise, because it is not easy to find other yachtmen on a unknown freuquency?
__________________
Caribdis is offline   Reply With Quote
Old 16-10-2017, 22:49   #4
Senior Cruiser

Cruisers Forum Supporter

Join Date: Mar 2007
Location: Santa Cruz
Boat: Boatless Again
Posts: 4,478
Re: New ICM M-802 and antenna length

Not many SSB nets in the Med at this time of year, but see
Mediterranean - List of Radio Nets —

If you have ham license, you could try listening to yourself on the internet through a software defined radio receiver.
websdr.org

Finally, maybe one of the SSB equipped CF members in the Med could set up a schedule.
__________________
donradcliffe is offline   Reply With Quote
Old 26-10-2017, 03:56   #5
Registered User
 
Auspicious's Avatar

Join Date: Jun 2003
Location: Chesapeake Bay
Boat: HR 40
Posts: 1,847
Send a message via Skype™ to Auspicious
Re: New ICM M-802 and antenna length

Not clear on why a separate battery for the HF/SSB. My preference is a single house bank as large as you can manage and a really good DC-DC converter to keep the voltage supply to the radio stable.

The Icom manual is dated and does not reflect current best practice. It isn't wrong, just not the best.

Your antenna (GTO-15 to backstay at 58 feet) will have a very high impendance on the 8 MHz marine band. Your AT-140 may struggle to get a good match.

Grayline performance is best - mornings & evenings.

You might want to dig through the Sailamail website for frequencies and times where you can find someone to test with.
__________________
S/V Auspicious
AuspiciousWorks
Beware cut and paste sailors
Auspicious is offline   Reply With Quote
Old 26-10-2017, 06:01   #6
Registered User

Join Date: Aug 2017
Posts: 121
Re: New ICM M-802 and antenna length

Go here and check out which location applies to you.
You can check in for a radio check.

East Coast Cruising Nets

Choose the correct frequency for your license.
__________________

__________________
Nicor is offline   Reply With Quote
Reply

Tags
antenna

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
Proper Length of Antenna and Other SSB Questions - Part II gchabs Marine Electronics 4 31-05-2012 10:48
Proper Length of Antenna and Other SSB Questions gchabs Marine Electronics 25 09-03-2012 13:51
For Sale: Icom 802 Marine SSB Radio with AT 140 Antenna Tuner loved cruising Classifieds Archive 3 13-01-2011 06:54
Optimum Insulated Backstay Antenna Length LuvToSail Marine Electronics 1 24-02-2010 15:12
Wanted ICM 802 and tuner Sunspot Baby Classifieds Archive 0 15-04-2009 14:41



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 02:10.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.