diodes

  1. How to set up my 220V to 9Vx2 transformer?(What is wrong?)

    So I tried to make an adaptor that can give me voltage around 9-10 Volts. There are total 5 wires as you can see in the attached image. I am using a 1000 uF(25V) capacitor parallely after the bridge diodes as said. But the capacitor is heating up and I think the lid/head of the capacitor is...
  2. P

    Identifying diodes

    I need help identifying diodes in a 1980 Marantz Amplifier. There are two diodes in series. They are connected at the cathodes. One is marked A27 and the other simply has an H as the only marking. These were added to the amplifier after production because they are not on the schematic. They are...
  3. C

    Not sure how this analogue circuit works... exactly

    I need to add the following level control circuit to an existing device and am wondering how it works... **broken link removed** Here we have audio in two places, one going through Q1301, the other above on a buss called signal as well. The issue here is how to control the level of that...
  4. Diode with low voltage drop?

    Hello I need a diode with less voltage drop like 10SQ050 that is 50V 10A... But i need something that is rated at least 30A or 40A with 50V or more... Is there such a diode available? Also do any of you know what kind of diode is that in image below (in red circle)? **broken link removed**...
  5. J

    H-Bridge Amp for 8Ω Speaker (PWM)

    I am using fairly robust D882 and B772 transistors in my design, so I am wondering if I still need 4 damper diodes to protect the transistors as shown below? (Leaving them out saves a little on space and cost.)
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