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Type: Posts; User: Theremingenieur

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    Either LT-Spice's default parameters for the...

    Either LT-Spice's default parameters for the 2N3819 are atrociously wrong or I have a wrong memory. But with what I see in your graph, the 10k potentiometer for adjusting the ribbon current might be...
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    The 2N3819 FET (or every other NJFET as constant...

    The 2N3819 FET (or every other NJFET as constant current source) needs at least 6V above the max pitch CV to work stable (Ugs ~ -3V, Uds ~ 3V). With a max pitch CV of 5V you really can't get away...
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    In my design I didn't have a floating wiper. I...

    In my design I didn't have a floating wiper. I fed the ribbon from an adjustable constant current source and thus the wiper and one end of the pot were grounded (see schematic below) which already...
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    It’s not that a soft pot generally needs this or...

    It’s not that a soft pot generally needs this or that. It’s all about careful circuit design to obtain the desired result I an specific use case. But as long as Kirazvora does not publish fully...
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    The proof that it can be done in the video below....

    The proof that it can be done in the video below. That’s an electronic cello which I developed in 2013. It has even a 1000mm soft pot and 5 octaves with linear tone spacing. As you can hear, that...
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    First of all: These soft pot ribbons have...

    First of all: These soft pot ribbons have basically very good linearity, so I suspect that you did not connect it in an ideal way. The ribbon pot has 3 connectors. Let's call them A,B, and C. A must...
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