HI' I replace the ballast of the fluorescent lamp with capacitor the tube is 20watt '60cm worked at 220 volt I replace it's ballast with a capacitor 10uf 400 volt non polar the tube give a light but the light is flash the frequencey is 50 hz is there is any modification to overcome this problem ?
thank you for any help
There are a good number of reasons as to why a ballast is used (older transformer-like version or newer electronic version). You have tossed out the engineering by using a simple capacitor, and wonder what to do????????? My questions are: (1) are you sane? (2) are you ignorant? (3) do you not know well enough to leave something that works (and that you
*clearly* do not understand) ALONE?Yes there is a modification that will work.
Put the ballast back.
And fix the auto-repeat on your keyboard.
Yar-
This is not a new idea. I've seen capacitors used as ballasts with battery powered lamps, where AC was generated at a high frequency to drive the fluorescent lamp.
As far as your 50 Hz, isn't that your local AC power frequency? As long as you use AC with a flourescent lamp, it will flash, but probably at twice the power frequency. The lamp is not polarized, so it ignites on both positive and negative voltage peaks.
To get around that, you would need to rectify the AC power, use the D.C. to drive an oscillator at a higher frequency, and drive the lamp (using a new ballast) with that instead. Of course it will still be flashing, but at a higher frequency.
It might be possible to drive a flourescent lamp using D.C., but you would need a resistor to limit current, which would get hot and waste power.
73, Fred, K4DIIHave something to add? Share your thoughts — no account required.
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