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    One more schematic clarification

    That's one of the reasons we use them. We have a recordable sound effects circuit that has 2 possible modes, latch (push button on, push again off) and momentary (push button on, release off) by cutting off the 0Ω resistor.
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    DirtDevil filter replacement

    Welcome to the forum. This google link has several videos showing how to replace the bag...
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    Relay Help!! 24v to replace 18v?

    Welcome to the forum. Keep in mind you are responding to a 5 year old thread. https://www.newark.com/potter-brumfield-te-connectivity/rp489018/rp489018/dp/45AJ7398?ost=rp489018
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    Pioneer S-W700 Subwoofer

    Personally I would give it my best shot to fix it, especially because you're getting good advice from very intelligent people. If all else fails you know where to get the part. I found the service manual on ebay...
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    Pioneer S-W700 Subwoofer

    They have the AWZ5389 board.
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    Pioneer S-W700 Subwoofer

    https://instrumentalparts.com/cart.php?suggest=d8e916b8-41b4-4655-a8c8-b42909ba28e6
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    Mig welder wire speed controller problem

    I see a couple of connections on the bottom of the PC board that look kind of "iffy." They're on the upper 1/3rd section.
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    how to make always on?

    Welcome to the forum. Try pushing the switch BEFORE applying power and hold it. Then apply power. If it turns on then all you need to do is short the switch. If not, then you need electronics to simulate a button press.
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    supplier recommendations

    https://www.digikey.com.au/
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    Rectifier IRL2703

    https://www.bristolelectronics.com/irl2703-ir-international-rectifier
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    Electronics Mortuary

    Ahh. All it needs is a little touch-up soldering.
  12. P

    Need a comparator but don't have one?

    Use an opamp without feedback resistor
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    Radar Sensor PCB repair

    Welcome to the forum. Maybe someone else can help - I can't make out what that is. This is the cheapest one I could find if it comes to that: https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2380057.m570.l1313&_nkw=6208428+&_sacat=0
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    Electrolux tumble dryer with F19 or F12 error codes.

    From the manual: F10 to F24 Failure of a component Switch off and unplug the dryer . Wait for about half an hour . Plug in the dryer and start the programme again . If the failure persists, call the After-Sales Service .
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    How would you go about testing this port without its adapter?

    18.5VDC 2A positive center. Looks like 5X2.1mm
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    Marantz 2230B with Weak FM

    I used to encounter this. It could be a blown RF or IF amplifier stage.
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    Need help sourcing a Triac

    https://www.jameco.com/z/BTA41-600B-Major-Brands-Triac-BTA41-600B-600-Volt-40-Amp-TOP-3_2299599.html?utm_medium=buyNow&CID=findchips&utm_source=supplyFrame
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    RC engine sound simulator, how to install in 3yo kids rideable toy?

    Welcome to the forum. I did something similar at work for different sound effects. It plugs into your computer headphone jack and records 20 seconds of sound from a wav file. Perhaps you can use something shown in this link and simply record race car sounds from the internet with the microphone...
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    Need help sourcing a power transformer

    https://www.worthpoint.com/worthopedia/yamaha-pa-w10-external-ac-power-244891187
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