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Old 6th November 2003, 04:43 PM   #1
nbcd is offline nbcd  Romania
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Question can be MJE2955 be replaced??!

i want to build this amp but first i want to ask if it is possible to replace MJE2955 and MJE3055 with KT818 and KT819?
i attached the url to the schematic i 'm reffering
:http://sound.westhost.com/project03.htm
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Old 6th November 2003, 07:06 PM   #2
Netlist is offline Netlist  Belgium
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You could.
Keep in mind that the KT818 has different letters after his number.
KT818A, KT818B and so on.
My database fonts are a bit corrupt for the moment so it doesn't give me the correct letters.
Anyway, different letters stand for different voltage.
KT818: NF/S-L, 40..90V, 10A, 60W
A=40, B=70, =50, =90V

As you can see, only the A and the B are useful. To be safe I would take the 90V version.
Same applies to the KT819.
This is a pure electrical interpretation. I can't guarantee that the amp will behave the same way as with the original transistors.
You will need Mr. Elliott to tell you more about that.

/Hugo
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