Jensen Cap orientation

[beardy80]

Hi Guys,
A friend is giving me a couple of Jensen Capacitors and I've noticed that they have a line on one end. Are they polarised? Does it matter what way they go in something like an EM Drive?
Is there a way that I can work it out for things in the future? I think the mention that the line should go to ground
Cheers in advance!

[GoranP]

Is this the one you are talking about?

http://www.hificollective.co.uk/components/jensen_aluminium_foil.html

[dexxyy]

At roughly about £15 each those would be wasted in an EM drive, great valve amp material tho'

[beardy80]

Yeah that's the kind of thing. I'm getting them for free so I thought I'd give it a go as I've no other use for them and they're the right value

[GoranP]

Well in that case you got your answer. :)

In any case, if I were you, I'd hold on to as many of these you can get your hands on. You never know when the tube bug is gonna bite and the component you actually need costs 100x less.

[dexxyy]

Or flog them and buy 100 caps