Author Topic: Test results and question (30 IPS "roll-off" in the highs)

March 05, 2023, 04:53:52 PM
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aktivomat

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Hello! 

First I just wanted to post my test results to confirm if these are "ok". Especially because I built two units hoping to use them in the 2-bus. At 80 Hz I see quite a "drift" from the "norm" on both units, or is this "ok"? Something i should do/change/calibrate? I did the test with two different DMMs with quite same results. Unfortunately none of them get the 10kHz :-(

 Second: Is it possible that with 30 IPS there is no "roll-off" at all in the hights?

Thank you so much for your assistance and kindest regards,
Ivo


March 15, 2023, 11:23:28 AM
Reply #1

JPK

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Your results are good.
The variation between units comes from the absolute value of the pots which are specified at +/-20%.
JPK

March 15, 2023, 11:37:41 AM
Reply #2

aktivomat

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Your results are good.
The variation between units comes from the absolute value of the pots which are specified at +/-20%.
Thank you very much for your reply! So I’m happy :-)

Please could you also answer my second question: Is it “normal” that with 30 IPS there is no "roll-off" at all in the hights?

March 15, 2023, 11:40:16 AM
Reply #3

JPK

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Yes it is normal. The high freq roll-off only happens at 7.5 and 15 ips.
« Last Edit: March 15, 2023, 11:41:53 AM by JPK »
JPK

March 15, 2023, 11:48:48 AM
Reply #4

aktivomat

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