matherp Guru
 Joined: 11/12/2012 Location: United KingdomPosts: 9805 |
Posted: 11:02am 20 Mar 2023 |
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I would say a key problem is that you are inputting a highish voltage signal into a highish gain amplifier with a noisy power supply. You are then attenuating the input with RV1 which reduces the signal to noise ratio of the system.
I'm running an external amp with a quality power supply and I get no noise at all. There are slight clicks but they are exactly the same in the CMM2. |