AUTHENTIC NAVY ALARM SOUNDS PAGE - THE TECHNICAL SECTION
So, you wanted to learn MORE about Navy Alarm Sounds and how they're made. Welcome!
This section of the Navy Alarm Sounds pages is for additional technical detail, movie files, etc. that will provide some
educational information about how the sounds are generated, the background of the sounds, maybe some scanned documents if I get frisky. I didn't want to clog up the main page with all of this additional detail, so I thought it deserved its own section.
I don't have a definite timeline for completion of this section. I'm just going to start adding content to it, and when it's done it's done. I have a lot of reference material, unfortunately a lot of it is in heavy, bound manuals which are an absolute pain to take apart. Also, they're rather fragile as some are over 75 years old (the WW2 equipment manuals for example).
One of the projects that I've recently undertaken is the activation/restoration of a few different actual Navy alarm signal generators. In 2016 I purchased a WW2 Operadio signal generator, type NB-1340 that I was recently able to obtain the tech manual on (Thanks to Ed Z from the USS Slater crew!), so I can now commence with the restoration on this piece. Manuals on Operadio stuff are EXTREMELY hard to come by these days, it seems the RCA 1MC equipment was much more utilized then the Operadio. This particular signal generator was installed on USN destroyers older then the Fletcher class. My signal generator is dated 1944, and is actually in very good cosmetic condition. We'll get into the innards of the unit a bit later, unfortunately 75-year old electronics tend to have components shift value, which can throw off the operation of the unit. I'll have to check to make sure all the resistors and capacitors still are in their original range before I apply power to the beastie.
Another project is to reactivate several Dynalec Alarm Generator stacks (mod 61601-050), these are stand-alone 4RU modules that interface with the AN/SIA-120B series announcing systems. The ones I have, three were used and came off USN LCAC landing craft, and are for General Alarm only. Out of the three, two can be made operational, one is for parts only currently (since it's missing a necessary amplifier module!). I procured these (at considerable cost!) from Big Iron Surplus in Alabama, an EBAY seller. One more of these units in the lot I purchased was unused and had a full complement of modules for General, Chemical, and Collision alarm generation. This is the one that I've restored first, I plan on posting a few pics of how I did it up as well as the sound actualities from the modules. I own it so I can make perfect recordings for your listening pleasure and use. Eventually, I have a feeling this piece will end up at a ship museum. The BB-62 (USS New Jersey) amateur radio crew made up a wonderful alarm display for the general public in one of the compartments of the main deck. They took the old 1MC stack from the USS San Diego (AFS-6) during a strip ship trip and integrated it into a fixed display for adults, children, etc... using authentic contact makers, speakers, and the control rack from the stack which was amplified. What you have is a "pull the handle and hear the sounds" kind of interactive, authentic display. Since I first visited the New Jersey a number of years back, I've wanted very badly to put one of these together. Truth be known, I've wanted to do this since at least 1998 when I made my very first strip ship trip. So, I've taken the module, integrated it into a Middle Atlantic 8RU rack along with a Rauland-Borg 28VDC power supply (made for school PA's), a Rolls 35 watt studio-grade monitor speaker amplifier, and a Wiremold AC center that has full-strip switching. Add two speakers, some contact makers, and PRESTO! One complete 1MC alarm rack! Here's a picture of my construct...
Just a side note, I've volunteered for the USS Charles F. Adams (DDG-2) restoration crew. The Adams is slated to be permanently berthed in Jacksonville, Florida later in 2017. The effort to bring this ship back to a port it once served from for over 20 years has in itself been years in the making. The ship has been heavily demilitarized and will need extensive clean-up and some modification when it gets to JAX for tours to be given, but the work is not impossible, just a bit time-consuming and somewhat costly even with volunteer labor. The ship has been in the inactive fleet in Philadelphia, PA since roughly 1991, and has been subject to numerous strip ship trips, which removed various items of her hardware. So, if this pans out I'll probably have a hand in restoring the Adams 1MC system, including it's alarms. It just so happens I have the complete tech manual on the system, along with some plug-in control rack modules that I removed from the USS Bagley back in 2000. I'm keeping close tabs on the effort to bring the Adams to Jacksonville. First in line is a mandatory dry-docking however, this is to occur later in 2017.