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The Poor Serbian Man's Optical Attenuator
The Poor Serbian Man's Optical Attenuator
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Old 29th November 2010, 02:12 AM   #21
wabun is offline wabun  United States
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Sorry as I still have another doubt, the split power supply which use LM317 for +ve and LM337 for -ve rails constant current source has different current output, although I constructed them with 22Ohms current limit resistor, but I got ~ 46mA at +ve rail and ONLY ~ 16 mA at -ve rail. By calculation I shud get ~ 56mA from each rail.. why this happen ? :-( tot LM337 faulty, but still the same even replaced with new IC.. I measure the current by connecting 100 Ohms resistor ( serial to ammeter)
and shorted the output ( LM 337 / LM317 ) reference to ground.. thanks
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Old 29th November 2010, 07:44 AM   #22
Zen Mod is offline Zen Mod  Serbia
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The Poor Serbian Man's Optical Attenuator
lets continue talk about issues in proper place ;

http://www.diyaudio.com/forums/analo...e-control.html

this article interface isn't so convenient as we are used to - in threads , where we can post images easily
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Old 29th November 2010, 06:06 PM   #23
spavleski is offline spavleski  Serbia
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The Poor Serbian Man's Optical Attenuator The Poor Serbian Man's Optical Attenuator
continue here http://www.diyaudio.com/forums/analo...ml#post2381190
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Old 18th June 2012, 11:26 AM   #24
precision1 is offline precision1
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Optical Attenuators

Thanks for another wonderful article. Where else could anyone get that kind of information in such a perfect way of writing? Iíve a presentation next week, and Iím on the look for such info.
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