[Amps] 1N Diodes

[Mark - N5OT]

Ameritron AL800H - two 3CX800s

Meters have always behaved badly.  Manual says when this happens, then 
D117 may be shorted.  I have the amp opened, and this diode tests shorted.

Manual says this diode "protects the overload circuit and the meters."

It's a 1N4001.  I can't find any around here.  I have about 1x10E18 
1N4003 diodes.  Can I use a 1N4003?

Thanks in advance.

73 - Mark N5OT