[PhilG57]

These two units are in the electronics closet on my sailboat. At one time, they may have been used for electronic noise suppression, but now I have no idea if they are needed. Can anyone confirm their function??? Thanks.

[Marmot]

Originally Posted by PhilG57

Can anyone confirm their function??? Thanks.

Remove one and read the label.

[PropBet]

^that^
It looks like a power inverter possible, but a couple of screws and a look on the back will tell you everything you need to know.

What mfg of boat? What / where do wires go to and from? They don't appear to be connected now? (or at least from the limited view in your image posted.)

[Fireman431]

Single wire in with a 12v + & -? An alarm possibly? Is that a peizo alarm on the top of each?

[Marmot]

Originally Posted by Fireman431

Is that a peizo alarm on the top of each?

It is a power transistor and that points toward the item being a power supply or regulator of some sort.

[PhilG57]

All good ideas - thanks. I'll try to take a closer look at the units this weekend, as my desire is to remove them if no longer needed. Boat is a Swan 57 sloop. Thanks again.

[PhilG57]

The units have labels which read something like this:
Blaupunkt
Elektronischar
Sbgunugstailer

If I Google that last word, it suggests "Spannungsteiler" which turns out to be some sort of voltage divider.

I also discovered that if I pull off the ground wire from the units, the (new) VHF radio will not power on so I assume these units are in the electrical return path for some reason.

Think this is going to wind up being another electrical mystery to me.

Thanks.

[Capt Bill11]

Could they have been amps for an old stereo system?

[Marmot]

Do you have a 24V boat? Or a 12V boat with a 24V radio?

[PhilG57]

She is a 24v boat, with a couple or 12v circuits for electronics. I believe this is a 12v circuit as the old Sailor VHF radio had it own, dedicated, 24v to 12v converter.

[Marmot]

There you go then. Disconnect them and all the 12V electronics will probably go dark.