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    Sansui au517

    Welcome to the forum. It looks like there are a couple versions. The secondary on both are dual center tapped 35V with 4A fuses. The primary side has multiple taps for selecting input voltage. Have a look: https://www.manualslib.com/manual/890560/Sansui-Au-517.html?page=12#manual
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    Selecting a MOSFET

    We use IRLZ44N logic level MOSFET for our 3V circuits. A direct replacement is STP55NF06L.
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    Replace power MOSFET in subwoofer plate amp, Sledge STA-1000D

    What is the part #? Never mind. I see it was never identified.
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    Replace power MOSFET in subwoofer plate amp, Sledge STA-1000D

    Welcome to the forum. What country are you in? I might find something closer to you. https://www.questcomp.com/part/4/spd07n60c2/384899444?utm_term=spd07n60c2&utm_campaign=aktype0&utm_medium=industry-cpc&utm_source=findchips&utm_content=standardpricing
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    In search of data sheet for an old Sansui tape deck chip MSA806

    I found the complete service manual for the SC-3300. The PCB assembly is Sansui part # G-1265. I checked the "globe" and neither the chip or PCB assembly could be found. All I found was someone selling a complete deck in excellent condition on ebay for $300.
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    hitachi V-660 oscilloscope

    Instead of turning it off with the power switch, does it flash if you unplug it?
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    hitachi V-660 oscilloscope

    You're not giving us too much information. Does it work normally otherwise?
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    Power connector - looks like a B on its side

    Can you show a picture?
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    GE lxw18jbcrw-2 fridge leaking water

    Welcome to the forum. I had a similar problem with a GE refrigerator a long time ago. The problem I had was a "gasket" around part of the freezer was leaking causing part of the drain to freeze up and partially block the drainage. Check it out.
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    Pioneer SC-82 with dc err

    Welcome to the forum. If I understand you correctly, you are measuring DC voltage on the speaker output. This could be the reason the protection circuit is shutting the radio down. Check the audio output stages and post a schematic of this.
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    Gold tester

    Welcome to the forum. If you suspect that machine is the only one in existence, I wouldn't trust it. Do what jewelers do: Test With Nitric Acid Make a mark deep enough to scratch through the top layer of gold. Carefully apply a drop of nitric acid to the mark, and determine if the mark turns...
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    PIC16F64 - flickering rest

    You can deactivate it in the configuration bits in the programming software. Usually near the Code Protect on and off.
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    PIC16F64 - flickering rest

    Welcome to the forum. It sounds like it could be the Watchdog Timer timing out in a loop. Try disabling it.
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    Tips on how to cut a pcb

    My homemade PCB's are made with thin material. I use a regular paper cutter.
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    Amana A024SE Oven Varistor Blown

    Welcome to the forum. It looks like there is another circuit board underneath. Have you looked at it?
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    1972 Dual Trace Dumont 2100 Oscilloscope Schematic/Manual

    Hi Doug. May I suggest that you clean all switches and controls with contact cleaner before doing anything. Not just the ones on the front panel but any internal trimmer pots too. Use a pencil to mark their position, spray and turn them back and forth a few times.
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    Determining the resistance of the LC Tank

    That I don't know how to do. If your frequency was KHZ or MHZ and C + L was uF and H or uH I could tell you.
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    Determining the resistance of the LC Tank

    What are the values of the inductor and capacitor, and what is the frequency?
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    Determining the resistance of the LC Tank

    Do you want to know the DC resistance or AC impedance at the resonant frequency?
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    Audio emitter resistor

    Welcome to the forum. Sounds like a 5 Watt .22 ohm resistor. I replaced many of them when I did stereo repairs. Check for shorted output transistors. Many times they are the cause.
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