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Old 7th March 2010, 07:02 PM   #1
lurchy is offline lurchy  United Kingdom
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Default Help with Cambridge A3i

Hi, I've just repaired an old A3I I got hold of and whilst it seems to be working now I have a couple of questions: -

1. what is the correct setting for bias current

2. with the amp at idle there is a noticeable buzz from the transformer, is this normal or an indication of anothe fault?

Thanks in advance for any help you can offer.

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Old 7th March 2010, 07:47 PM   #2
tiefbassuebertr is offline tiefbassuebertr  Germany
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Location: D-55629 Schwarzerden
I choice 30 mA idle current for Sanken's output power stage. The noticeable buzz from the transformer is often present. The reason therefore are only mechanical effects of the transformer itself (no electrical reason like mains DC or transient components).

ckeck out this thread:
Cambridge Audio A3i repairs and mods
you will get a wide range of additional advices there.

Last edited by tiefbassuebertr; 7th March 2010 at 07:52 PM.
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Old 8th March 2010, 07:28 AM   #3
lurchy is offline lurchy  United Kingdom
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Thank you for that, I'm off to check it this morning.

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