Hifonics Zeus Z440

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An MUR1620CT would work.

Do you have ANY junk amps?

I don't see how you could have gotten 0.5v on diode check if the rectifier is open. That's not a mistake that you can make. Are you sure that your meter leads are OK. If you hold the probes together on diode check, do you get a constant tone and 0.00v reading no matter how you pull on the leads?


Perry Is this a good replacement of what you were saying to use?
MUR1620CTG ON Semiconductor | Mouser

Also the Mosfet is a FQP 50N06 would this be a good replacement?

FQP50N06 ON Semiconductor / Fairchild | Mouser

Iam going to replace all 8 like suggested but just wondering why? Iam ok just replacing on of the rectifiers?
 
For reliability, parallel components must be relatively closely matched. You have 1 FET of a parallel group of 4 that must be replaced. Replacing it alone could make the amp unreliable.

4 is the absolute minimum. Since all of the FETs were stressed when the rectifier shorted and they're inexpensive, it's good practice to replace all of them.

Check all 8 of the 47 ohm gate resistors to make sure that all are within tolerance.

The parts that you listed are OK.
 
They aren't that expensive so I don't mind replacing them. I just wanted to know for my knowledge why its best to replace them all.

The gate resistors the left side they are all 46.5 ohm and the right are all 46.3 ohm. Do they need to be replaced?

Are to parts I listed good or is there something else that I should be looking at?
 
It's likely due to a tiny bit of residual voltage, or maybe there's a diode somewhere in the circuit affecting the readings.

If you do this again but place the red probe on the FET side of the resistor for all resistors, it may make a difference.

The difference is absolutely insignificant. You'll sometimes have all resistors reading slightly different.
 
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