Peavey CS1200X

[Techknowman]

I have a Peavey CS1200X thats blown one of the channels.
I have all the parts but the 7205 transistors.
Peavey #70407205.
Several cross sheets show the following as crosses.
MPS-U60
SDS-7205
BF-463

All of these are near impossible to get.
Is there a better cross?
Thanks

[Jazz P Bass]

I am in the middle of a SLM Audio Centron 1600 that has these goofy bastards in it.
In this case they are MPSU07.
Found one on EBay.
The kicker was the 2N3584 that popped.
$25.00.
I guess you could twist the leads on a MJE xxxx & insert it backwards, as the MPS are EBC.

[Techknowman]

I have 2 Audio centron 1200s. 1 is labeled as a crate 1200 which is no surprise.
The mosfets are the pricey hard to find parts in those.
I don't mind swapping EBC pinouts in a cross. I just want to get one that is safe to sub with.
The 7205 is the main driver and if it goes, it takes out 8 MJ15024's at $4.00 each

[Jazz P Bass]

Do you have ANY Audio Centron schematics?

[Techknowman]

Yep MP1200 http://ftp://techknowman.com/Electronics/Schematics/Audio%20Centron/MP-1200.pdf
techknowman@techknowman.com is my email

TechnicalSupport@loudtechinc.com
(crate) its where i got it

[Steve Conner]

MPSU60, I'd be very tempted to swap it for a MJE350. Or if that is too slow and you get parasitic oscillations, maybe a MJE15035. Both are commonly used as drivers in high powered audio amps.

But beware, the pinout is ECB as opposed to EBC on the original part.

I'd like to think that the 2N3584 could also be replaced with the MJE15034, if you don't mind bodging the TO-220 package into the TO66 mounting holes.

[Techknowman]

I just found the 2N3584's at a little hole in the wall electronics parts shop i frequent north of Dallas.
he had a lot of them. I bought 5 for $1.00 each. these are the smaller transistors shaped like TO3 right?

[Steve Conner]

Yes, TO66s are like mini TO3s. Haven't seen one in years.