Hello,
I have an unfortunately defective Threshold Stasis 3.
I discovered that 4 transistors in the power stage are defective. Should I replace everyone here with new MJ1502*? Or can I only replace the defective ones?
A few transistors on the front end are also defective.
MPS6571 replacement by ??
MPSA42 replacement by?
Maybe someone here who has already replaced it can help me.
Isn't there an assembly plan for the front end somewhere?
I have an unfortunately defective Threshold Stasis 3.
I discovered that 4 transistors in the power stage are defective. Should I replace everyone here with new MJ1502*? Or can I only replace the defective ones?
A few transistors on the front end are also defective.
MPS6571 replacement by ??
MPSA42 replacement by?
Maybe someone here who has already replaced it can help me.
Isn't there an assembly plan for the front end somewhere?
Attachments
There is a fairly recent thread on a Stasis 2 repair/restoration and I recall some discussions of parts placement and replacement transistors:
https://www.diyaudio.com/community/threads/help-please-with-my-poorly-stasis-2.408577/
Also Papa gave a revised FE board and design here:
https://www.diyaudio.com/community/threads/new-stasis-front-end.363701/
https://www.diyaudio.com/community/threads/help-please-with-my-poorly-stasis-2.408577/
Also Papa gave a revised FE board and design here:
https://www.diyaudio.com/community/threads/new-stasis-front-end.363701/
Does anyone have the dimensions for the front panel of the device?
Unfortunately mine was sanded down and the sides were also shortened. I would like to restore these to their original condition. Unless someone happens to have a front like that 😉
Unfortunately mine was sanded down and the sides were also shortened. I would like to restore these to their original condition. Unless someone happens to have a front like that 😉
The Gerbers should be in the first post of the new stasis FE thread.
I suppose you could try reaching out to Jon Soderberg of Vintage Amp Repair. Maybe you can send him one functioning output transistor that he can try to match to? That is a bit of a stretch though.
MPSA42 is still in production it looks like. MPS6571 are still around. I personally would try the new front end circuit.
I suppose you could try reaching out to Jon Soderberg of Vintage Amp Repair. Maybe you can send him one functioning output transistor that he can try to match to? That is a bit of a stretch though.
MPSA42 is still in production it looks like. MPS6571 are still around. I personally would try the new front end circuit.