[Amel Yacht Owners] M801E HF/SSB Radio power Supply
Hi Dean,toggle quoted messageShow quoted text
On Amelia we have the M802 SSB installed by Amel. They chose the DC converter route: there are two Mastervolt 20A converters in parallel.
These are located under the chart table in the little locker.
There is a breaker to power them up by the chart table porthole.
Is this a good system?
Amel decided it was the way to go. However Mastervolt do not make a 30A version to make your 60A supply.
Secondly: if the Mastervolt fails and allows 24v direct to the Icom then damage will occur to the radio. An in-line fuse would not blow because only the voltage would be up not the current.
If you use your engine starting battery, and then charge it from the 24v domestic bank with a Mastervolt Magic series 20A it will
1. be less expensive
2. Be safer for the radio from a power supply basis as even if the Mastervolt failed, and allowed 24v direct to the battery, that would protect the radio. Although there would be potential for damage from applying 24v to 12v battery.
Why am I worried about Mastervolt DC converter failure?
Because it happened to me. When I bought the boat. The surveyor powered up the SSB at the breaker. Smoke poured out or the Icom box! I checked everything and one of the converters failed and sent 25v to the radio. Burnt various capacitors etc within the radio. I had it fixed and bought a new DC to DC converter. However I have asked myself whether this is really a good system ever since. I am now paranoid.
So if I am not using the SSB much I disconnect the power supply from the radio then power up and check the voltage is 13.5v before plugging it back in.
So not sure I am helping much.
Nick Amelia (#019 Aml 54)
On 17 Dec 2018, at 04:39, trifin@... [amelyachtowners] <amelyachtowners@...> wrote:
Hi again NIck,
Where did you locate the M-802 Transceiver Unit?
If somewhere around the chart table area, do you have any RF interference issues with the long signal cable run from the chart table area to the aft lazarette? Did you have to install any suppression measures?
I suspect there is a dedicated conduit run for this cable but I've used it already for my solar cables. (I've just realised maybe that additional unused conduit was meant specifically for SSB!).
Amel 54 #154
Dean,toggle quoted messageShow quoted text
The transceiver unit is fixed outboard of the chart table seat on the shelf. The tuner is located on the starboard side of the lazarette locker. The distance between the tuner and the antenna must be kept as short as possible.
This arrangement works fine, and is common practice on sailing yachts. in terms of humidity, the tuner is in a sealed box. Mine has been there for 12 years without problem.
I also installed a solar arch with double wind generators. The cables run in the conduit, provided but it is now a tight fit.