60-70v unregulated power supply recommendations

[JoeHarris]

Hi Lee

Clive is correct , when a fuse blows the diode will only conduct
while the motor is generating a higher voltage than the power supplies output

just because its what I have in my spares box I would use
a 1N5408 - 1000V PIV 3A diode
( I think I used them to rectify the 250V mains )

with a 70 to 80V DC power supply a 1N5401 - PIV 100V 3A diode would be OK

John

How would you implement this in practice? Solder the diode across the ferrules on the cartridge (I think it would fit back into the holder)?