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Old 16th June 2005, 11:55 PM   #1
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Default voltage-tripler diode values??

Hello, I am building a power supply for David Royer's modified MXL 2001. I do not know what type or value of diode I should purchase for the voltage-tripler circuit? the schematic resides on prosoundweb.com at http://www.prosoundweb.com/recording...mic_25_3.shtml.
I imagine they are rectifier diodes. What value of diode should I purchase? Does the rating have to be similar to the output of the transformer or above?
I would really appreciate help! I think everyone of you are awesome people! I look forward to the day when I can answer questions like this.
Thanks!
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Old 17th June 2005, 12:08 AM   #2
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1N4007 diodes should work well. Good for 1 amp at 1000 volts.
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Old 17th June 2005, 12:10 AM   #3
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I have no experience with voltage trippler but I guess you should use diodes rated several times higher current than transformer is rated because of high capacity loading.(maybe 1n400x series)
regards
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Old 17th June 2005, 02:24 AM   #4
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Any low cost 1A diodes from 1N4004 up should do since the large C values you are using means sizeable peak currents.

But the impedances and leakage for these mics are such that you could make a small oscillator running at 50KHz up, small fast diodes and C's of the order 1nF and still achieve the desired results - this approach is taken by at least one Hi End mic I have been involved with -all built into the mic body and running from the phantom.
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Old 17th June 2005, 06:58 AM   #5
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Thank you all! I can't wait to get on with this project.


AMPLIFIERGURU , please explain your idea to me in noob terms! Are you saying that instead of a voltage-tripler I could add an oscillator?
I am a total noob!
Anthony
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