Ugh, this is killing me.
2560 but no P rank on octoparts
1647 still no P rank on octoparts
Waiting weeks to have them be in at Encompass for 5 times the price or using no rank?
There is one possibly on eBay, right font and font size. Also, Digikey sent me "Y".
How much does this spec matter?
2560 but no P rank on octoparts
1647 still no P rank on octoparts
Waiting weeks to have them be in at Encompass for 5 times the price or using no rank?
There is one possibly on eBay, right font and font size. Also, Digikey sent me "Y".
How much does this spec matter?
It will slightly affect distortion figures. A higher open loop gain of any amp (which higher gain transistors will give) means there is more scope for distortion reduction when the feedback loop is closed. We are talking very tiny amounts.
I would not expect different hFE ranks to affect the basic operation of the amp at all.
I would not expect different hFE ranks to affect the basic operation of the amp at all.
Are there stages to these transistors? Like does it go NPN to PNP to emitter? I could have sworn I saw something like that when I was looking with a flashlight under the board.
I believe the schematic might say the same;
Current goes from NPN to circuitry back to PNP and then seemed to go outbound from there
Current goes from NPN to circuitry back to PNP and then seemed to go outbound from there
Gotcha.
I have to wait till Wednesday day to finish this project, the PNP rank P (found some in the USA) will be here, might as well learn more in the meantime
I have to wait till Wednesday day to finish this project, the PNP rank P (found some in the USA) will be here, might as well learn more in the meantime
Denon (Encompass) moved to Y and P for these transistors. Makes me feel a little better.
I'm going to commence this project tomorrow, got all the parts now
I'm going to commence this project tomorrow, got all the parts now
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Well, got everything mounted and soldered, put it back in and the main fuse blows, not the two ceramic transistors on the power supply board.
I guess I'm going component hunting for something overvolting or not having proper capacitance.
Any other ideas, please let me know
I guess I'm going component hunting for something overvolting or not having proper capacitance.
Any other ideas, please let me know
Ok, the center channel keeps popping transistors. It doesn't blow the fuse though..
Since I'm out of transistors again, would enjoy your feedback.
Since I'm out of transistors again, would enjoy your feedback.
The honest answer is that I think this is outside your abilities. It is a very complex amp and it is difficult to work on. It uses an SPS power supply which limits your ability to power it up in a safe state such as by using DBT.
You have done your best with it 🙂 but it needs more involved diagnostics.
If you short the vbe generator out then the output transistors can not draw current together and so they should not fail. That is the first basic step to take.
You have done your best with it 🙂 but it needs more involved diagnostics.
If you short the vbe generator out then the output transistors can not draw current together and so they should not fail. That is the first basic step to take.
Why not? I've dumped $400 in this amp and it's still worth around $850+
I don't care if I want to resell, at least I know how much it is.
I don't care if I want to resell, at least I know how much it is.