Soundstream SA 120

[Krapulax6]

Hello all!
I have this amplifier…the rectifier diodes are replaced,i dont know why,but i see the FED16BT…is this the original rectifire diode?
D5/D6 are same FED16?

 

[Perry Babin]

The FED16BT is used in the SA80 so it's possible it's used in the 120. Someone may have more definitive information.

FED16 isn't a complete part number.

 

[Krapulax6]

FED16BT,yess….
But this one, are good condition…
I dont know why…this rectifier diode is not avaible in Hungary,can You tell me what is the replacement part?

 

[Perry Babin]

The replacement is/was the FEP16BTD. The B is the voltage. The last letter indicates doubler. I don't see any available. With the extra rectifier locations available, you may be able to use something like the MUR820 and hard wire some of the terminals to make the equivalent. You could do the same with the MUR1620CT or MUR1620CTR.

 

[Krapulax6]

Allright…but i not understand..
D5 is FED16BT
D6 is FEP16BTD ?

.:What was the original?

 

[Perry Babin]

The nomenclature/part numbering system changed.

The originals were:
FEN: negative CT
FEP: positive CT
FED: doubler

Then all became FEP and the type moved to a suffix, where needed. The A suffix is a common anode (negative). The D suffix, the doubler.

 

[Krapulax6]

Im ready for this…MUR860x4
Better than the original😅…
Thank you Perry,another topic with InPhase maybe afternoon or tomorrow…🤝

 

[Perry Babin]

For future reference, high voltage rectifiers (and virtually other component) has a greater loss than their low-voltage versions. This isn't a problem here but just because the voltage is higher, that doesn't make it better.

That said, here, 4 TO-220 packages will better dissipate heat than the originals.