Magic_Sailor
New member
I posted a couple of days ago about upgrading the service system on my boat by the addition of another battery and got some interesting and useful replies (what a creep!) I have some more info which you might (?) find interesting.
The alternator is indeed a Hitachi 35A
The blocking diode is a Lucas 4BD
The blocking diode has 3 terminals - 1 for the alternator, 1 for the service system (B2) and 1 for the engine start system (B1). Now then - interestingly, each of the terminals B1 and B2 have an ADDITIONAL cable. Both of these cables end up in the aft cabin under the bed along with a 3rd cable clearly intended as 0v (originally connected at the -ve terminal of the starter battery for no apparent reason). Now then, without any jokes about power sources for sex aids in the skippers cabin (well if you must); what else could these cables before other than an extra battery? It cannot be merely as a source of power as they are connected to 12V BEFORE the isolator.
NB - I recollect a number of months ago, someone posting that they had found an extra service battery in the aft cabin that they had not realised was there. Could this be the same thing? In which case I've just got to fit a battery box and connect up.
Further, this would make some sense as the other service battery is in the forepeak (remember?) and this additional battery would balance the boat (as pointed out by CCScott I think - 2 batteries in the forepeak would make her by the head a little). So, what are my questions? They are these:
1. Does anybody know where I can get technical info on the Lucas 4BD blocking diode?
2. Can you think of any other reason why these cables go into the aft cabin and stop?
3. Do you have any other postable comments?
Thanks in advance and with bated breath
Magic
<A target="_blank" HREF=http://hometown.aol.co.uk/geoffwestgarth/myhomepage/travelwriting.html>Click for website!</A>
The alternator is indeed a Hitachi 35A
The blocking diode is a Lucas 4BD
The blocking diode has 3 terminals - 1 for the alternator, 1 for the service system (B2) and 1 for the engine start system (B1). Now then - interestingly, each of the terminals B1 and B2 have an ADDITIONAL cable. Both of these cables end up in the aft cabin under the bed along with a 3rd cable clearly intended as 0v (originally connected at the -ve terminal of the starter battery for no apparent reason). Now then, without any jokes about power sources for sex aids in the skippers cabin (well if you must); what else could these cables before other than an extra battery? It cannot be merely as a source of power as they are connected to 12V BEFORE the isolator.
NB - I recollect a number of months ago, someone posting that they had found an extra service battery in the aft cabin that they had not realised was there. Could this be the same thing? In which case I've just got to fit a battery box and connect up.
Further, this would make some sense as the other service battery is in the forepeak (remember?) and this additional battery would balance the boat (as pointed out by CCScott I think - 2 batteries in the forepeak would make her by the head a little). So, what are my questions? They are these:
1. Does anybody know where I can get technical info on the Lucas 4BD blocking diode?
2. Can you think of any other reason why these cables go into the aft cabin and stop?
3. Do you have any other postable comments?
Thanks in advance and with bated breath
Magic
<A target="_blank" HREF=http://hometown.aol.co.uk/geoffwestgarth/myhomepage/travelwriting.html>Click for website!</A>