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Old 20th December 2011, 06:39 PM   #1
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Question Audionet AMP 1 idle current

Hi friends,

i have an Audionet AMP 1 Amp and the idle current is not ok. The left channel is very hot and the other side is ok. I think the current is the problem. Can you help me to get the correct setting?

chris
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Old 20th December 2011, 07:32 PM   #2
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Have you thought of measuring what the bias is now ?

(the MOSFET types that Audionet uses operate 'best' at 150mA minimum bias each. I gathered that Audionet biases them at 200, makes 400mA in the 2-pair AMP I, 600mA in the 3-pair output device monoblocks)
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Old 20th December 2011, 08:00 PM   #3
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thanks for your info but can you say me where are the measure points? Is a picture helpful?

Chris
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Old 20th December 2011, 08:54 PM   #4
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At the source resistors, which are tricky in the Amp I, due to the stacked board SMD setup.
Bias is set at the drivers, trimpot on the top PCB (Audionet fancies a driver for each output device)

Your amp boards look pretty much like this (different model, but close to identical boards)
http://blinkhighend.com/products/com..._detail-xl.jpg
See the trimpot on the second floor ?
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Last edited by jacco vermeulen; 20th December 2011 at 08:57 PM.
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Old 20th December 2011, 09:06 PM   #5
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ok i find the trimpot´s and the measure points. One channel 200mv other channel 140mv. I set both channels to 200mv the temp is identical now. On the audionet homepage is written 0,4A. Now is my setup ok. Thanks for your help

best regards
chris
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Old 20th December 2011, 09:27 PM   #6
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200mV ?

0.4A bias is 200mA per output device.
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Old 20th December 2011, 10:13 PM   #7
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yes 200mV per channel...
here my measure points -----> with 200mV which would correspond to 200mA per channel. I hope so

chris
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Old 17th July 2013, 04:34 PM   #8
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Hi i have set the current as i wrote it two years ago. But my problem is, the temperature is to hi. More then 10 seconds to hold the hands on is not possible. Is it ok? I think thats not ok but the current is set to 200mA.

Thanks Chris
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