Why Connect SSB Direct to House Battery?

[Paul Elliott]

Directly connecting the SSB to the batteries (with appropriate overcurrent protection) will bypass a lot of potential problems. However, it may not be necessary. On VALIS we have very short, heavy connections between the battery bank and the main breaker panel. The SSB is connected to it's own breaker on the panel. We have very little additional voltage drop at the radio. and no ground-loop or interference problems.

Our radio performance has been exemplary, as was demonstrated during the previous three Pacific Cup races, where we were the communications vessel.

I've seen plenty of power-distribution systems on other boats where a connection at the breaker panel would have resulted in horrible radio problems. If you have any question about your wiring, definitely go for the direct connection.

[richardhula]

Bottom line the average control panel won't take the necessary 30 amps or so required by a fully modulated 150 watt rig.

Connect therefore fused lead direct to batteries or adjacent high current distribution point (it won't make much difference). If have a panel switch operating a (70 amp) relay in this hook-up you have the means of isolating power to the radio easily.

[carlab3]

Thanks for all the great information! This has been a very helpful session.
Cheers! Carla