[GreenKeys] Secret DC Basement in NYC - Great History

[David Christ]

Someone else on the list should be able to confirm this, but ships during and prior to WW II and even more recently ran on DC (220 V?).  The high voltage for the tubes was provided by motor generator sets.  And of course many of us recall the dynamotors used in many mobile two-way radios used by police and taxis.

David K0LUM


On May 12, 2015, at 2:31 PM, Jim Haynes <jhhaynes at earthlink.net> wrote:

> If you lived in a DC powered area of a city it was hard to build a ham
> transmitter of any power because you needed a motor-generator set to
> develop the high voltage DC for the amplifier tubes.