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In the Forum: Melquiades Amplifier
In the Thread: 5 Channel Version of Melquiades

Post Subject: High-Pass Filter HelpPosted by skushino on: 10/7/2013

Romy, would you explain / help me better understand how you implemented the HP filter in Melquiades?

The schematic shows a series cap after the first tube stage (C3 and C4 in the schematic). I think these are the first-order HP filters, correct?

Question - what is the procedure used to determine the cap values?

My basic understanding is that the knee of the filter is a function of the cap value and input impedance of the following stage. I'm getting lost on determining the input impedance of the following stage. I have a hunch I'm overly complicating things.

My goal is to HP my ML2s around 60 Hz.

Thanks.

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