[Milsurplus] Arc Lamps for projector sets

[Bruce Gentry]

Here in Syracuse, the utility provided DC at 120 and 240 volts, as well 
as 600 for the trolleys. The trolleys were dismantled in 1941, but the 
DC  supply continued until 1953. All the downtown theaters used it for  
arc lamps and spotlights, and many other buildings used it for 
elevators.  Lighting in almost every case was AC, there were only a few 
homes and small businesses that used DC for lights and outlets. The 
utility was required to buy and install MG sets for dozens of customers 
when they ended their DC service from the downtown power station.  I 
don't know if Boston or lower Manhattan was the last district to shut 
off public DC service,  but was still on in the Canal Street district of 
Manhattan as late as 1992.
I know a lot of Navy radio gear could operate on DC, but aside from 
morale receivers, how much Army equipment used 120 or 240 volts DC ?

     Bruce Gentry, KA2IVY

Sheldon Daitch wrote:
> Way back, when I was still in high school, I worked in
> a theater which used carbon arc lamps but we had
> a motor generator which provided the DC for the arc lamps.
>
>
>
>
> 73
> Sheldon
>
> On 4/30/2012 5:57 PM, Richard Solomon wrote:
>   
>> Most of the Movie Theatres in Downtown Boston used DC for the Arc Supply on
>> their projectors. Copper coated Carbon rods were used.
>>
>>
>>
>> 73, Dick, W1KSZ
>>
>>     
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