[Boatanchors] Heathkit TT-1 filament current regulator capacitor

[Charles Johnson]

Has anyone found a suitable replacement for C9, C10 and C11 in the TT-1? 
This is the large 3 section oil filled AC capacitor that is used as a 
current regulator for the 300, 450 and 600 ma filament current 
positions. This cap has two 3.6 and one 7.1 ufd sections and they are 
high by about 10% which raises the allowable filament current and thus 
the voltage to the tube under test, giving false test readings. Using 
other filament voltage positions is a work around in some cases, but the 
TT-1 doesn't have a 12.6 volt filament position, for instance.
Any ideas appreciated.
73, Charles, K4ZRJ