Kenwood Kac-1023

Does this mean D23,24,25,26 are all the same diode ?

And if so do you happen to know of a good replacement for the EH1 I can’t seem to find them at digikey or mouser
 

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I think that will work. This is the rectifier for the driver voltage for the output transistor drivers. I don't know how much current they need to handle. I initially looked at 1 amp diodes but saw the 4 amp of the same size so I picked that one.

I also thought about the BYV-28-150s that were used in the old Rockford amps. The BYV-27 would also likely work. Many people who work on vintage Rockfords have those in stock.