wrote:
Hi,

I need to ID a diode. It is in the regulation circuit of an old 28v
Power Supply.

http://wallyheider.com/wordpress/201...udio-recorder/

Markings are Z104 (twice) and CDC.

There are other diodes on the board in the 1N4001 case style/size,
but this one is slightly longer and thinner and has a black shiny coating,
not matt.

the Z in the marking might indicate a zener diode. Is the original part
dead? If so, your best bet is to reverse-engineer the schematic so to
guess better what is the right substitution.
A power supply shouldn't be that hard to fix.

HTH
Frank