Martin wrote:
Am Fri, 25 Nov 2005 22:13:38 -0500 schrieb Phil Hobbs
:

Si Ballenger wrote:

I would put a 100 watt lamp in series thereby limiting the current.
I would shave the ends down to points so they heated up rapidly. I
put them into a hollowed out fire brick and made a cheap furnace.
Of course don't look at it; it's like looking at the sun.

The current limiter I saw used a glass pie pan with pieces copper
metal on each side with salty water as the electrolyte. It would
start to steam some when in operation. The furnace was a small
clay flower pot with holes in each side with the carbon rods
sticking inside until they touched.


As a boy, I used an electric teakettle as a ballast for a two-D-cell
carbon arc lamp--worked great.

An electric arc with just 3V from two D-cells? I thought the arc needs
at lesat 20V burning voltage.


It ran off 120 V. Parse the sentence as "two D-cell-carbon arc lamp." An
earlier poster talked about building AC-powered arc lamps using the carbon
rods from dry cells.

Cheers,

Phil Hobbs