Using a fluro ballast as a Filter choke?

[Pedro]

Can a common fluro ballast eg for 20 or 40watt tubes be used as a
filter choke in a tube type power supply? Any idea what typically the
inductance is?

thanks
Pedro

 

[jhill]

It might work, but ballast are not designed for the current thru them to
have a DC component. It would probably saturate the metal core, and the
inductance would then become near zero.
My question is why bother, when the correct ones are available?