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Build help and troubleshooting => TS500 Tape Simulator => Topic started by: aktivomat on March 05, 2023, 04:53:52 PM

Title: Test results and question (30 IPS "roll-off" in the highs)
Post by: aktivomat on March 05, 2023, 04:53:52 PM

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

(https://i.imgur.com/k9AifSH.png)

Title: Re: Test results and question (30 IPS "roll-off" in the highs)
Post by: JPK on March 15, 2023, 11:23:28 AM

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

Title: Re: Test results and question (30 IPS "roll-off" in the highs)
Post by: aktivomat on March 15, 2023, 11:37:41 AM

Quote from: JPK on March 15, 2023, 11:23:28 AM

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?

Title: Re: Test results and question (30 IPS "roll-off" in the highs)
Post by: JPK on March 15, 2023, 11:40:16 AM

Yes it is normal. The high freq roll-off only happens at 7.5 and 15 ips.

Title: Re: Test results and question (30 IPS "roll-off" in the highs)
Post by: aktivomat on March 15, 2023, 11:48:48 AM

Thank you!