Posted by Tnuctipun [ 172.147.165.137 ] on January 21, 2005 at 20:27:47:

In Reply to: Re: also...more L options posted by Damir on January 21, 2005 at 13:54:55:

Hey-Hey!!!,
On the resistor to force a critical curent load. I went in playing with PSUDii and a resistive load. 250 volts in, 20 Hy and fiddled with resistor values. I got up to 45kOhm and did not cross 300 volts on a long term basis, and figured it was plenty to keep things in check, and from behaving like a cap input supply.

V-squared over R at 300 volts shows dissipated power to be 2 watts on a 45k resistor. A 5W ought to run cool enough. 5 9k1 1/2 watt will also work if you feel like experimenting. Since B+ is ~200, continious dissipation will be less than a watt for a 45k resistor.
regards,
Douglas

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