DC Servo DIY Kit for DCCancellation - diyAudio
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Old 19th April 2015, 11:20 PM   #1
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Default DC Servo DIY Kit for DCCancellation

Hello friends. I would like your opinion on this correction circuit dc offset.
Worth the installation in Rotel RA-970BX. Thanks to you I have corrected an offset of + 70 to -68 mV. But I still -20mV in both channels.
* From already thank you and excuse the insistence. With you I am learning not to make mistakes and correct defects in my amp. Greetings.
2X DC Servo DIY Kit for DC Offset Cancellation Mono of Power Amplifier | eBay
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Old 20th April 2015, 01:02 AM   #2
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With 20mV offset there is no need for a DC cancellation.
20mV is not going to move the speaker much.
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Old 20th April 2015, 01:48 AM   #3
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Thank you. Is that as the Rotel is not intended to calibrate the dc offset, I would take it to zero mV. I had understood that it is desirable to less than 15 mV. But if you say no harm -20 mV, so I'll leave. Thanks again.
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Old 20th April 2015, 01:57 AM   #4
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I would accept quite a bit more than 20mV.

The offset can wander a bit as the amp warms up.
I would check that and decide from there if you need dc cancellation.
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Old 20th April 2015, 02:02 AM   #5
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It is so. Lights when the amplifier, being at room temperature, the offset is -24 mV. After arriving 30 minutes to stabilize at - 19 L and - 20 mV in R.
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Old 20th April 2015, 02:04 AM   #6
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That's sounds good.
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Old 20th April 2015, 02:41 AM   #7
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Well, thank you.
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