Steve (Emerald Sea) gave you good input for the specifics of your Lagoon 450....
But, please read what smac wrote again! As this is very good info!!
Originally Posted by smac999
if something was effecting the plotter it would be high power radidation from the antenna. or voltage drop issues if wired poorly and from same bus. the screen
and main box can go anywhere.
Not knowing what the exact problem your had with your plotter on the 410, caused by transmitting with your SSB radio, it's difficult to tell you what not to do on the 450!
But, smac gives you great info here...
1) Usually transmit RFI is getting into your other electronics
on-board, from them (the other electronics) picking up your actual transmitted signal (from your SSB antenna)....it is usually all the long wires running from one instrument / display / sensor, to the others, that act as a receive antenna, and picks up a good deal of your transmitted energy...
The key here is to isolate ALL of your electronics wiring
, as best you can....that means using clamp-on ferrites on ALL electronics wiring
on-board (except the SSB antenna's GTO-15 wire), preferably on both ends of each wire....
Also, keeping all this wiring as far away from the SSB antenna as you can...
And, most importantly...have a good RF ground / Antenna ground for your SSB antenna!
Secondarily....although not far behind in actual practice...is to keep common-mode RF currents off of you SSB cables/wiring...
And, this means using a "line isolator" on the SSB coaxial cable, connected right at the tuner....
And, also using ferrites on the tuner control/power wiring, as well as on other wires/cables coming into/out-of the main SSB transceiver...(although it is rare for things like the main 12vdc power wires for the SSB and/or its speaker wiring, etc. to be a cause of transmit RFI, anything can happen, and ferrites are cheap
, and you're going to be putting 'em on wires anyway, so why not do 'em all!)
2) Other possible "plotter problems" when transmitting on the SSB, could be a voltage drop on the 12vdc bus, and/or the 12vdc breaker/wiring going to the plotter....
This is common on many factory / dealer installed SSB radios on Beneteau's, Lagoon's, etc....as they typically do not wire the SSB radio directly to the batteries, rather to the breaker panel, etc., and allow the high current
draw to cause a serious voltage drop in the main 12vdc bus...
So, in addition to taking Steve's input on where to mount the radio on a Lagoon 450, please don't forget the generic rules for proper SSB installation
For all the details you could ever desire, please have a look at the "sticky" right at the top of the Marine
Electronics page...(and follow the links there)...it's not really a "discussion", but rather a reference source...
Marine SSB Stuff (how-to better use / proeprly-install SSB, & troubleshoot RFI, etc.)
Further, don't forget to have a look at the Sailmail Primer (which tells you a lot about avoiding RFI)...
Originally Posted by wojdi
I'm searching for a place on a lagoon 450F to install SSB.
On the lagoon 410 I had the problem, that sending with the
SSB affected the plotter a lot. I tried to isolate the cables
but it didn't work.
Now I would like to avoid to have this problem and install the SSB not to close to the plotter.
3) Although you did have one on your old Lagoon 410, I'm not clear how much you used it, nor how well it worked...
So, now that you got the info on where and how to properly install and wire-up your new SSB radio....perhaps you'd like some info on how to use it more optimally??
If so, please have a look at these Youtube playlists...
Maritime HF Communications
M-802 Instruction videos
4) And, finally....while "any" antenna ground / rf ground will work to some extent (even none at all), it is all a matter of degree...i.e, how well does it work....especially compared to others and at what co$t...
So, before you spend the $$$ on the KISS....please have a look here...you'll learn a LOT (not the least of which is how poor the KISS actually works....and how you can make an artificial counterpoise
that will work better than it, for < $5....)
Re: KISS-SSB Counterpoise
I do hope this helps..