Good day all,

I've been developing a damped sine generator to perform the DO-160 lightning
test, and have had some reasonable success. However ( there is always a gotcha
), the leading edge of the 1 MHz ring wave has a very short ( around 10 nS )
spike on it. I have tried a number of things to kill the spike, but to no
avail. Does anyone have suggestions on what causes this, and ways to eliminate
it?

I have strived to keep stray inductance small, very small, maybe too small.....

The switch is a high voltage vaccuum relay.

-- 
Derek N. Walton
L F Research
Poplar Grove, IL 61065, USA 
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