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Re: Will the K&K CCS work?

Posted by Dave Davenport (M) on June 6, 2005 at 06:00:39

In Reply to: Re: Will the K&K CCS work? posted by bequerel on June 5, 2005 at 23:28:19:

Hi,

Let me step in here if I may since I have experience with using a CCS.

The high voltage in the power supply is a result of a combination of voltages. Starting from ground and going toward the power supply, first there is the cathode bias voltage. Second is the plate-to-cathode voltage that is determined from the constant current level and bias point chosen on the plate curves. That voltage is a static voltage and the signal voltage will ride on top of it. So the third voltage is the peak signal voltage. The forth voltage is the voltage across the CCS: ten volts should be adequate across a single DN2540 but I would be happier with 20volts.

So, for example,

15 Volts bias
110 Volts plate-to-cathode
30 Volts peak signal
20 Volts CCS
------------
175 Volts total

This is a minimum and you might want to add a little overhead, so say 200 Volts would be a good number.

Dave

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