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Registered Member #1940
Joined: Tue Jan 27 2009, 02:34PM
Location: Netherlands
Posts: 34
Hi
I have a question about my new flyback. The flyback contains a capacitor in the HV section. Is it possible to remove this capacitor? It is ruining the spark of my plasma speaker :( Here is a picture of the flyback. I got the flyback from a philips IDTV.
Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
Really? That transformer looks to me like it does not have any capacitor. The rectangular thing is the focus/screen divider for the CRT, and the cylinder under the HV lead is probably the rectifier stack; it looks too slim to be a HV cap.
Registered Member #834
Joined: Tue Jun 12 2007, 10:57PM
Location: Brazil
Posts: 644
Practically all flyback transformers used in monitors have an internal capacitor and a rectifier. You can disconnect it insulating (with hot glue) its ground pin, that is one of the pins under the square box. You can cut the pin too, leaving less to be insulated. I prefer to keep the pin. I don't see the capacitor ground pin in the picture. Maybe is the same visible under the potentiometers, or really there is no capacitor.
Registered Member #1940
Joined: Tue Jan 27 2009, 02:34PM
Location: Netherlands
Posts: 34
Antonio wrote ...
Practically all flyback transformers used in monitors have an internal capacitor and a rectifier. You can disconnect it insulating (with hot glue) its ground pin, that is one of the pins under the square box. You can cut the pin too, leaving less to be insulated. I prefer to keep the pin. I don't see the capacitor ground pin in the picture. Maybe is the same visible under the potentiometers, or really there is no capacitor.
The following thing happens. When I cut off the power, you can hear the flyback leaking power. When you wait 30 sec (after cutting the power) and bring the two HV connection close to each other, you can see and here a spark (0.5cm).
I tried to use this flyback for my plasma speaker. The sound is horrible, unless I make the spark less the 1cm. I think that some of the sparks are stored in the capacitor.
Here is a picture of my flyback Edit: Another picture
Registered Member #639
Joined: Wed Apr 11 2007, 09:09PM
Location: The Netherlands, Herkenbosch
Posts: 512
For a audio modulated flyback I would take the core out of a modern flyback and then wind your own secondary on a piece of yellow PVC, just one layer of wire. This will give a way shorter arc but a nice and stable AC output perfect for audio modulation.
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Removing capacitor from flyback
and thats where Franky got his one.
