(Topic ID: 289589)

Need feedback - CFTBL ejector issue - Odd 70V scope curve

By Ashram56

7 months ago


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  • Latest reply 7 months ago by Ashram56
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#11 7 months ago

The filter cap on that voltage is quite small.

If you have close to a zero load on the coil voltage then the cap is big enough to hold it high consistently. It is a DC voltage under light loads.

If you have a heavy load (e.g. any coil) then the cap is not big enough to hold it high and you will have a rectified AC voltage as presented by the output of the full wave bridge rectifier. With a full wave bridge rectifier - you should be seeing 120 pulses per second (assuming your mains power is 60Hz). This is what you see.

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