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1942 USN Type H-1 alarm

Posted: Thu May 09, 2019 4:13 pm
by Jfo137
Hello,
I picked this up at a yard sale for 5 bucks the other day. It is marked Type H-1, dated 1942 and has a USN proof mark. The big question I have is the voltage, it is marked 115 volts DC and .2 amps. Could the 115 volt DC be correct? If so any ideas hoe to power it? I don't want to burn it out. Any thoughts???

Re: 1942 USN Type H-1 alarm

Posted: Thu May 09, 2019 6:17 pm
by Jfo137
Photo of the tag

Re: 1942 USN Type H-1 alarm

Posted: Fri May 10, 2019 1:37 am
by Unit of Civil Defense
That .2 (point two) Amp is suspect....the point does not look like any of the other periods used in the nomenclature and .2 Amp would not be enough to drive that siren...2 amps on the other hand, yes.
I am not that familiar with the Navy ships of that era.....I am assuming that with the electrical power generated aboard a ship would be slightly higher with it being DC

Re: 1942 USN Type H-1 alarm

Posted: Wed May 22, 2019 12:40 pm
by Darley Champion
That would be an explosion-proof electromechanical horn,, not a siren. Hence the .2 amps rating.

Re: 1942 USN Type H-1 alarm

Posted: Mon May 27, 2019 9:37 pm
by Jfo137
Any idea how to find a 115 volt DC power supply?

Re: 1942 USN Type H-1 alarm

Posted: Mon Jun 10, 2019 4:52 am
by Jake_7367
Jfo137 wrote:
Mon May 27, 2019 9:37 pm
Any idea how to find a 115 volt DC power supply?
You could make your own, using 4 rectifier diodes and a high-voltage DC capacitor (300v 1000uF at least).

Be sure to observe correct polarity!