Elevated Heater Voltage, please help

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My heaters are running DC and the heater voltage is elevated up 40V by a voltage divider across the B+. There is a cap across the lower leg of the voltage divider. I don't understand how to calculate what the cap value needs to be in this application and why it is there.
Please help and explain this cap and its value.

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Topic - Elevated Heater Voltage, please help - asglfaw 16:36:05 01/28/07 (2)

Re: Elevated Heater Voltage, please help - sheldone@cox.net 17:14:41 01/28/07 (1)

Whut he said. - Poindexter 18:35:44 01/28/07 (0)

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