C
C. Jensen
- Jan 1, 1970
- 0
I am trying to determine the frequency characteristics of an 8W
fluorescent tube. For this purpose, I am driving it with a commercial
signal generator via a 12W audio amp and step up transformer.
Before the tube ignites, I get get a nice clean sinewave. After it
ignites, the waveform diminishes in amplitude by half and exhibits
distortion proportionate with the brightness of the tube (as I
increase the signal voltage).
I assume this is due to loading, but I am unsure of what approach to
take, since the amp seems suitably rated. Series resistance does
nothing.
Can anyone offer any suggestions?
Claus Jensen
fluorescent tube. For this purpose, I am driving it with a commercial
signal generator via a 12W audio amp and step up transformer.
Before the tube ignites, I get get a nice clean sinewave. After it
ignites, the waveform diminishes in amplitude by half and exhibits
distortion proportionate with the brightness of the tube (as I
increase the signal voltage).
I assume this is due to loading, but I am unsure of what approach to
take, since the amp seems suitably rated. Series resistance does
nothing.
Can anyone offer any suggestions?
Claus Jensen