The second variant overcomes the need for a shield turn by placing the primary winding switching end (and its first few turns) far from the secondary winding ground lead.
Here's the QSC PL380 Schematic
Download Below Link
Hotfile.com: One click file hosting: QscPl380 Service Manual.pdf
Download Below Link
Hotfile.com: One click file hosting: QscPl380 Service Manual.pdf
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to buy for german clients
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Anyone tested PL380 under dummy load?
Let's say 4 ohms one channel loaded, 100Hz till clipping, oscilloscope parralel to dummy load?
I quit to do classD amplification and I keep concentrate mine time on TD class.
How manny watts are here on that movie?
The dummy load is 4 ohms at 25 celsius degrees, let-s say 5 ohms at incandescence.
The protection of mine SMPS with PFC, tripps at 3500-3600Watts, and it have do that at the end of the movie.
Freq is 93,7 Khz resonant mode trafo is ETD59 3F3, 55 amps warp IGBT's
I used 2 small capacitors for secondary filtrage 1000uF/200Vcc power supply was +/- 170Vcc in idle and falls down at +/- 165Vcc at full load, because of PFC .
Also a "little pumping of supply" to +/- 175Vcc pulses because of PFC stabilisation too.
No fan on any heatsink of SMPS part, no more than 50 celsius degrees in couple minutes of testings (sure I will use in finished model).
The "noise coil" is from coils of TD class (selfresonant), for next experiment I will use piloted downconverter.
So , what's the power (permenent sustained) achieved and what wiil be the burst power of that "mine experiment"?
watch the movie, please!
DSCN3495.mkv - YouTube
http://postimage.org/image/2zheuyvj8/
http://postimage.org/image/2zhjtkx0k/
And the movie before SMPS tripped:
http://www.youtube.com/watch?v=7bMcDikRjTg&feature=player_embedded
Let's say 4 ohms one channel loaded, 100Hz till clipping, oscilloscope parralel to dummy load?
I quit to do classD amplification and I keep concentrate mine time on TD class.
How manny watts are here on that movie?
The dummy load is 4 ohms at 25 celsius degrees, let-s say 5 ohms at incandescence.
The protection of mine SMPS with PFC, tripps at 3500-3600Watts, and it have do that at the end of the movie.
Freq is 93,7 Khz resonant mode trafo is ETD59 3F3, 55 amps warp IGBT's
I used 2 small capacitors for secondary filtrage 1000uF/200Vcc power supply was +/- 170Vcc in idle and falls down at +/- 165Vcc at full load, because of PFC .
Also a "little pumping of supply" to +/- 175Vcc pulses because of PFC stabilisation too.
No fan on any heatsink of SMPS part, no more than 50 celsius degrees in couple minutes of testings (sure I will use in finished model).
The "noise coil" is from coils of TD class (selfresonant), for next experiment I will use piloted downconverter.
So , what's the power (permenent sustained) achieved and what wiil be the burst power of that "mine experiment"?
watch the movie, please!
DSCN3495.mkv - YouTube
http://postimage.org/image/2zheuyvj8/
http://postimage.org/image/2zhjtkx0k/
And the movie before SMPS tripped:
http://www.youtube.com/watch?v=7bMcDikRjTg&feature=player_embedded
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