On Sat, 20 Apr 2013, Phil Allison wrote:


"Michael Black"

Of course the fuse takes care of the whole thing, it's in the primary to
the power transformer. F601, it's a 6amp fast-blo 3AG fuse for 120vac
operation (3ampts if running off 240v).

** As marked on the rear of the scope - the fuse needs to be a "slow blow"
type.


It's a standard glass fuse, you should be able to get them anywhere.

I couldn't be bothered going down to the basement to check, the manual was
handy. The parts list says fast-blo. The odd thing about the manual is I
see no photo of the back panel.


** Well, anywhere that has available a good range of fuses for electronic
equipment.

Slow blow fuses are commonly stamped or marked with a "T" before the amp
rating.

So look for a " T6.3A " fuse in 3AG size ( or 32 x 6.3 mm) - though such as
high value seems wrong for a tube scope.

If you use a standard "fast " fuse, it may well blow at switch on.

Which makes sense, and I just copied what was in the manual. I turn mine
on, and the lights dim. If it was fast, you're right, that kind of inrush
would blow the fuse before the thing had a chance to take off.

Michael