[MRCA] [MMRCG] Shipboard Damage Control Communications

[MARK DORNEY]

Could be sound powered. The crank is attached to a magneto that in turn powers a ringer.  Idea behind a sound powered phone is to provide a means of voice communication if the ship lost all power. In the Army, they provide a nice, light weight means of voice communication.  The WW2 issue T-10 did not have a ringer - both a blessing and a curse. Both ends require an operator to constantly monitor the phone, but also eliminated any forward position from a ringer giving away a position. The Vietnam vintage TA-1 had a ringer, but was limited in that any splicing in the phone lines significantly cut down transmission signal.   

Mark D. 
WW2RDO

“In matters of style, float with the current. In matters of Principle, stand like a rock. “.   -   Thomas Jefferson 

Sent from my iPhone

> On Sep 26, 2023, at 3:10 PM, mstangelo at comcast.net wrote:
> 
> Nick,
> 
> Interesting reading.
> 
> We periodically take a trip to Delaware via the Cape May-Lewes ferry. I like to stand on the upper deck beneath the bridge. The last trip out was foggy. I noticed when the fog rolled in a crewman was stationed at the front (is it called bow on a ferry) of the boat. When he observed a buoy or a ship close by he opened a phone box, took out a handset, turned a crank and spoke into a handset. Even though the ferry has radar and GPS I've wondered if this was standard or they were testing the phone and if this was a sound powered phone. 
> 
> I've attached a jpeg of the phone. It has a bell on the top.
> 
> Mike N2MS
> 
> 
>> On 09/26/2023 2:29 PM EDT Nick K4NYW <navy.radio at gmail.com> wrote:
>> 
>> 
>> Thanks to Hue W7HUE, I have posted a document covering shipboard damage control communications (probably WW2). In case you've wondered how sound-powered phones are used, this makes interesting reading. Even if if you haven't wondered that, it makes interesting reading. 15 pages, typewritten.
>> https://www.navy-radio.com/manuals/ic-damage-control.pdf
>> 
>> Nick England K4NYW
>> www.navy-radio.com (http://www.navy-radio.com)
> <Cape-May-Lewes.jpg>
> ______________________________________________________________
> MRCA mailing list
> Home: http://mailman.qth.net/mailman/listinfo/mrca
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:MRCA at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html