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Sound powered telephone equipment provide facilities for talking and signalling with-out the use of any batteries or a power source. The telephone handset contains a sound-powered transmitter and receiver units.The field telephone set built into a metal case, the top of which can be closed without interference with the the instrument inside.It operates by batteries which are no longer available. Built in hand generator to ring the other phone.
I don't have any sound powered phones. I do have 4 German Field Telephones. I believe the Germans may have been among the last in NATO to use them. They use very common D batteries and can be useful for point to point communications if you have the cabling handy. You can also make your own cheap field phone-Lite with an old corded handset, a 9V battery and a resistor (around 300ohm). Google how to make your own intercom.
The OP was a spam poster, but apparently forgot their link. As to availability of old military field phones, I know that Sportsman's Guide carries them in their "military surplus" section.
"Guns are like shoes...a woman should have one in EVERY caliber!"
I have 2 T/A 312 and 2 T/A-1 phones. The TA-1s do not require ANY batteries and are sound powered, with a range of about 4 miles. The TA-312 take 2 D cell Batteries but many people don't realize that the TA312 can be used without batteries for a distance of around 4 miles. If you use the 2 d cells it can go about 12. Sportsman guide has been offering brand new rolls of field phone wire for $27 which is incredibly cheap. Over the years I have managed to scrounge up some spare parts (going through $1 boxes at gun shows pays off) and even found some of the "crystals" that are used in the non-powered manual switchboard. Allows you to connect multiple phone when you want to. You don't need a switchboard you can wire them in a hot loop but all the phone will ring and everyone can hear the conversation, which isn't always bad. If you get a roll of wire try to find the reel handle it makes deploying and retrieving the wire very easy.
That is good information, thank you.
Say SHTF. Could one use currently ran cable (i.e. COAX) as wire?
If the gird is down, splice into the cable company lines?
Beware of the guy with only one Cast Iron pan . . . he likely knows how to use it.
I don't think you can use "cable" wire. You need a 2 wire cable like speaker wire set up (using speaker wire would be exspensive). I believe the newer digital field phones take a 4 wire cable but I'm not 100% sure of that since I was out before such "modern" convinces. There might be a way to use the old hard wire landline phone wires. I'll have to remember to ask a guy I know who is a Verizon line tech.
Something else we used the T/A-1's for was as a makeshift "blasting machine". We would take electric flashbulbs and rig them up on commo wire around our parameter during training. A push of the generator on the TA-1 would provide enough electric to set off a string of those flash bulbs- good for disorienting and ruining the night vision of those folks attacking up.
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