Hi all. The other week I gave the A channel of my scope a voltage spike
it didn't like and soooo I gotta fix it Among other things
there is a source follower FET in the input stage right after the
attenuator. It has written on it "304" then underneath that, "E 5M".
It is definitely dead but I can't seem to work out who makes it to get
replacement or a data sheet to choose a reasonable substitute. Can
anyone help me here?

TIA , GP :-)

"Graham" wrote in message
ups.com...
Hi all. The other week I gave the A channel of my scope a voltage spike
it didn't like and soooo I gotta fix it Among other things
there is a source follower FET in the input stage right after the
attenuator. It has written on it "304" then underneath that, "E 5M".
It is definitely dead but I can't seem to work out who makes it to get
replacement or a data sheet to choose a reasonable substitute. Can
anyone help me here?

TIA , GP :-)

Well, looking at the schematic of my OS-7040, there is a FET 2SK304E.....
sounds like it is probably your "304". That FET Googles up to many places of
data and sales.
Old Chief Lynn

Thank you very much, Lynn :-)
And Ben Clarke too.