Quick and Dirty
SP-600 by Chuck Rippel, WA4HHG Change C141 and C142 to 100 pF, polystyrene. Change C143 to a 0.01 uF, polystyrene. Change C148 to a 0.01 uF, polyester. Change C149 to a 10 uF, electrolytic. Change C151 to a 20-30 uF, electrolytic. Add a 0.01 uF, 630 V off the bottom of the primary of the output transformer to ground. Change R62, R63, R64, R65, R81, R82, R83, R98, R99 to metal film types.
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