On Wed, 18 Mar 2009 19:25:35 +1100, "Phil Allison"
wrote:



** Two pics of scope screens for SED

Same 23 watt CFL used in each case for current trace.

Normal AC supply versus pure sine wave supply.

Voltage trace = 100 V per div

Current trace =120 mA per div



..... Phil






Pretty nice if all that is needed to excite the gas are the peaks.

You mention units per division, but no divisions are visible.

Looks like the cut-off source makes light with less power.

What brands of lamp?