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Quad 306 buzz in right channel
Quad 306 buzz in right channel
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Old Today, 01:51 PM   #81
Mooly is offline Mooly  United Kingdom
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Quad 306 buzz in right channel
Sounds like a plan

Here is the sim with a simple PSU added. You can see the ripple on the rails and the rails are modulated by the amps output which is delivering around 55 watts into 8 ohms.
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Old Today, 01:53 PM   #82
Mooly is offline Mooly  United Kingdom
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Quad 306 buzz in right channel
And the current in one of the caps.
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Old Today, 06:47 PM   #83
RaggaMuffin is offline RaggaMuffin  United Kingdom
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Quote:
Originally Posted by Mooly View Post
Sounds like a plan

Here is the sim with a simple PSU added. You can see the ripple on the rails and the rails are modulated by the amps output which is delivering around 55 watts into 8 ohms.
Thanks. I've just watched a few youtube vids on PS ripple and noise because some of this is a bit over my head! But I'm getting to grips with it
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Old Today, 07:18 PM   #84
Mooly is offline Mooly  United Kingdom
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Quad 306 buzz in right channel
I know using LTspice is a lot to grasp in one go When looking at ripple currents such things as wiring resistance and transformer output resistance make massive differences. Also the caps are modelled as ideal in my sim but we can add more realistic parts. For example the 4700uF cap is just that, 4700uF theoretical cap whereas the real one has lots more going on beside.

It all depends on what you are wanting to look at. For frequency response and so on it doesn't matter, for power supply issues it does.

You can right click a part and try and find something suitable from the database or you can simply add typical values yourself.
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