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Old 23rd October 2010, 07:00 AM  
Zen Mod and Spavleski is offline Zen Mod and Spavleski
diyAudio Member
Join Date: Oct 2010
Default The Poor Serbian Man's Optical Attenuator

A gadget made by Spavleski & Zen Mod
Article scribed by Zen Mod

Click here to read the entire article

Last edited by Variac; 2nd April 2011 at 12:15 AM.
29th November 2010
diyAudio Member
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
29th November 2010
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Zen Mod
diyAudio Member
lets continue talk about issues in proper place ;


this article interface isn't so convenient as we are used to - in threads , where we can post images easily
my Papa is smarter than your Nelson !
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18th June 2012
diyAudio Member
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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