Tube mania skrev:Så prøv lige at måle DC fra stel til en af de modstande...ligegyldig hvilken...jeg tror der er DC på dem. Prøv begge kanaler...
Tube mania skrev:Så prøv lige at måle DC fra stel til en af de modstande...ligegyldig hvilken...jeg tror der er DC på dem. Prøv begge kanaler...
Fra Audiokarma skrev: Two things here:
1. The leads on the resistors are oxidized so clean them and make sure you're making good contact with your meter connections. You can also try other alternative connection points that are common such as directly at the emitters of the output transistor pair if possible.
2. Make sure you're actually measuring across the emitter resistor pairs and not the ends of the resistors that share a connection point. Meaning one end of R760 connects to the emitter of the NPN output transistor and one end of R761 connects to the emitter of the PNP output. These are the two points you're interested in measuring the voltage drop across. The other ends of both resistors will share a common node (this might be where you are trying to measure). Try measuring the voltage drop of each resistor separately and see if you're getting a measurement.
It's obvious to me that you don't have real experience or full understanding of the what, why, how etc. or you would have been able to suss the above out yourself along with other possible alternative connection points etc. I say this because what you're trying to measure and ultimately adjust can lead to smoke EXTREMELY quick and easy. This is a very nice integrated amp and I'm assuming this is an otherwise functioning amp at the moment so I'd just like for you to keep it that way.
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MDA skrev:Den skal til en kyndig som har styr på sagerne, dette er ud over mine evner.
Er igang med at rengøre en af de Marantz 2385 som jeg overtog af kbekke, mere om det senere idag.
MDA skrev:Nogle af pærerne har brændt så meget at der er begyndende sort misfarvning på glasset (på selve lampen), har derfor valgt at skifte alle lamper på den.
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