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Old 21st September 2006, 02:38 PM   #11
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Join Date: Jun 2002
Location: Macedon NY
a 4.7 uF cap is small amd may have a high ESR, causing heating. A larger cap won't have that problem, but may increase peak current too much for 5Y3. If you remove the cap, you'll have to decrease the value of the first resistor to keep the same voltage (should be at least 2W, since it now has to carry ripple current...). The RCRC filter that's left SHOULD have have enough ripple attenuation...
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Old 21st September 2006, 05:33 PM   #12
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Join Date: Mar 2003
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exactly what I did. the frist R was reduced from a value of 1.8K to 470R to maintain 320V at the junction of the tube and first resistor.
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