K, so I located these caps...They are the radial electrolytic type, correct?

There were 2 on the same board as the tubes, and one more on a board above...

2 on the tube board read:

8/50 A36 20
50/50 A29 20

The one on the board above read:

40/50 E2 A 30

I'm assume the 50 is voltage? Is the prefix uF? If so, I'm familiar with 10uF and 47uF but have never seen 8 or 50, or 40 for that matter...

Thanks