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1942 USN Type H-1 alarm
https://airraidsirens.net/forums/viewtopic.php?f=6&t=24334
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Author:  Jfo137 [ Thu May 09, 2019 4:13 pm ]
Post subject:  1942 USN Type H-1 alarm

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???

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Author:  Jfo137 [ Thu May 09, 2019 6:17 pm ]
Post subject:  Re: 1942 USN Type H-1 alarm

Photo of the tag

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Author:  Unit of Civil Defense [ Fri May 10, 2019 1:37 am ]
Post subject:  Re: 1942 USN Type H-1 alarm

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

Author:  Darley Champion [ Wed May 22, 2019 12:40 pm ]
Post subject:  Re: 1942 USN Type H-1 alarm

That would be an explosion-proof electromechanical horn,, not a siren. Hence the .2 amps rating.

Author:  Jfo137 [ Mon May 27, 2019 9:37 pm ]
Post subject:  Re: 1942 USN Type H-1 alarm

Any idea how to find a 115 volt DC power supply?

Author:  Jake_7367 [ Mon Jun 10, 2019 4:52 am ]
Post subject:  Re: 1942 USN Type H-1 alarm

Jfo137 wrote: *
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!

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