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.

** 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.

MDL is used in US equipment 14"*1-1/4" slow blow.


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.


Not on 60 Hz.