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Old 24th August 2009, 01:10 AM   #1
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Default Simple compressor

Hi Guys, a long shot, but does anyone remember a simple 'passive' compressor from Elector, early 80s I think, which consisted of a FET, diode, cap and a couple of resistors? I remember it working well with guitar & want to build another, but of course I lost the schematic decades ago....
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Impedance varies with frequency, use impedance plots of your drivers and make crossover calculations using the actual impedance of the driver at the crossover frequency
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Old 24th August 2009, 12:47 PM   #2
Kay is offline Kay  Germany
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try
http://sound.westhost.com/projects.htm
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Old 24th August 2009, 10:13 PM   #3
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Hi Kay, I'm aware of Rod's circuit, which uses optical compression, but I want to use the FET circuit. Actually, I could nearly draw it out it was so simple... I'll give it a go later and see if anyone has suggestions for component values.
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Impedance varies with frequency, use impedance plots of your drivers and make crossover calculations using the actual impedance of the driver at the crossover frequency
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Old 24th August 2009, 10:32 PM   #4
Kay is offline Kay  Germany
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If you need additional input, look at www.thatcorp.com
or another solution, Silonex
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Old 25th August 2009, 01:30 AM   #5
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Interesting Site Kay, Thanks, I'm going to read some of their app notes.
The compressors there are much more complex than what I'm thinking of though, posted what I think is the schematic here:
Simple compressor
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Impedance varies with frequency, use impedance plots of your drivers and make crossover calculations using the actual impedance of the driver at the crossover frequency
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