Interesting use for a K20... |
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Meat
Old Croc Joined: 05 June 2009 Location: Manc Status: Offline Points: 1514 |
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Posted: 23 October 2014 at 7:15am |
Don't test the champignon sound
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Motion54
Old Croc Joined: 13 November 2010 Location: London Status: Offline Points: 1753 |
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In order to achieve the required nominal current in the magnet, two amplifiers are used per generator. The amplifier's outputs are connected in series trough two transformers (see fig.7). The transformers are not only used to connect the amplifiers in series, but also to match impedance seen by each of them. The DIGAM K20 DSP from Powersoft can deliver its maximal power of 18 kW into a 4 Ω load. Thus the turn ratio of the transformers is 4:1. To obtain as much current as possible in the RLC circuit, the amplifier are configured in "bridge mode". This means that each stereo channel of the amplifier takes the same input signal, but one of them is phase shifted by 180 degrees. Then the output of each channel is connected to the load. Doing so, the output voltage is doubled.
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Rico
Registered User Joined: 21 February 2008 Status: Offline Points: 101 |
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They work together with the NSA, wich is stealing all the dubplates wich are send over the Internet.
And building the heaviest Sound world wide. Ist truth and no conspiracy
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bitSmasher
Old Croc Joined: 23 June 2012 Location: Melbourne Status: Offline Points: 2296 |
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"beat repetition of 2 hz"
120 bpm! |
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Earplug
Old Croc Joined: 03 January 2012 Location: Europe Status: Offline Points: 7199 |
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Obviously after the brown note...
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Earplugs Are For Wimps!
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azlan
Registered User Joined: 09 January 2012 Location: W12 Status: Offline Points: 364 |
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Reminds me of a story I read a while ago (which may well be rubbish) about macro-techs being used as part of older MR I scanning systems (for the same ability to cause large voltage swings under controled conditions)
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studio45
Old Croc Joined: 16 October 2007 Location: United Kingdom Status: Offline Points: 3863 |
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That's actually true, although it wouldn't be the Macro-Techs we use for audio exactly, but rather their industrial brothers the Amcrons, also made by Crown. These use the same power supply and output topology as the audio versions but do not have the same kind of input section or protection circuits, so are able to amplify DC control signals as well as AC waveforms (ie, you give them a volt of DC on the input, and they give you a hundred volts or more steady DC on the output, quite happily, without going into protect or blowing transistors). They would be driven with ramp signals from a controller, like very slow modified square waves. The output drives large coils in the MRI machine to modulate the steady field from the main superconducting magnet and accomplish the scanning (what happens there exactly is a bit beyond me!) I also read once on here about someone using one to generate the +/-17.5v rails for a large mixing desk in an emergency, using a pair of back to back 9v batteries on the inputs. Now that's what I call a fix ;)
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Studio45 - Repairs & Building Commotion Soundsystem -Mobile PA
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Cyklist
Young Croc Joined: 14 December 2007 Location: Ireland Status: Offline Points: 707 |
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few of those giant macro tech were up on ebay a good while back, went cheap enough, they were stupidly heavy 1 ohm stable and about 8+ rack units high, would be interesting to hear them driving a big pile of scoops ha!
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purple monkey dishwasher
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bitSmasher
Old Croc Joined: 23 June 2012 Location: Melbourne Status: Offline Points: 2296 |
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Gramps
Young Croc Joined: 17 February 2006 Status: Offline Points: 1046 |
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There's a few for sale on Ebay at the moment... Edited by Gramps - 23 October 2014 at 10:53pm |
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To do a dull thing with style - now that's an art.
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Gramps
Young Croc Joined: 17 February 2006 Status: Offline Points: 1046 |
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Output at 2ohms is 'only' 2300 watts or so though...
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To do a dull thing with style - now that's an art.
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Elliot Thompson
Old Croc Joined: 02 April 2004 Location: United States Status: Offline Points: 5172 |
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That was the Crown DC 300a Best Regards, |
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Elliot Thompson
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