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RE: BAT's tend to have cap problems

Electrolytic caps have temperature ratings.
Most standard caps are rated at 85 C. There are newer ones rated at 105 C and some even higher.

HEAT is the enemy here. The 6C33 tubes run damn hot, drawing huge filament current (8 amps, IIRC) I was asked to bring the amps in but one step into their demo room ended any possibility.

Cap life drops by a factor of 2 if the rated temperatures are reached. And the life is couple of thousand hours.

To be honest BAT is not the only manufacturer to ignore temperature ratings. The old Rappaport amps ran hot, hot, hot. Sounded good but never made it through a year ( early 80's). Mark Levinson ML-2's likewise: generated 400 watts of heat simply idling. Heat killed them. Working at a ML dealer in the early 80's not a single ML-2 made it through the warranty period.




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