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Old 09-30-2013, 04:17 PM
TinCanAlley's Avatar
TinCanAlley TinCanAlley is offline
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Join Date: Sep 2008
Location: So Cal, CA
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Okay, moved on the 240V boost section. I'm attaching three waveforms. Each are done at 50V/div and 20us/div.

The first is directly from the lead off the flyback where it connects to the boost diode. It's taller than my scope can display. I didn't realize it was 900V. Glad my scope didn't do something bad. I'm growing fond of it.

The second is on the other side of the boost diode and is now 248V. The waveform covers just over two divisions, so it's just over 100V and there's ringing in it.

The third is through a resistor and to the 10uf 300V capacitor. Again, I'm getting a really crappy waveform, but the basic form is the same as pic 2.

Now I tried scoping the other 240V boost, but I couldn't get a meaningful waveform. Where I scoped for pic two, it splits off from there to another point where it's connected to a 15ohm coil. It measures at 248V, but the waveform is pretty much non-existent. Don't know if it's the coil smoothing it out, or if my settings aren't working for it.
Attached Images
File Type: jpg B+ 240V (9) Small.jpg (32.3 KB, 4 views)
File Type: jpg B+ 240V (1) Small.jpg (37.8 KB, 5 views)
File Type: jpg B+ 240V (5) Small.jpg (39.3 KB, 3 views)
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